Verilink APS 2000-T1 User Manual

Verilink APS 2000 User Manual

August 1999 P/N 880-502411-001-D

Copyright Notice

about its products or services. Verilink’s sole warranty is contained in its product warranty. The end-user documentation is shipped with Verilink’s products and constitutes the sole specifications referred to in the product warranty. Verilink has made reasonable efforts to verify that the information contain ed h erein is accurate, but Verilink assumes no responsibility for its use or for any infringement of patents or other rights of third parties that may result. The customer is solely responsible for verifying the suitability of Verilink’s pro ducts for its use. Specifications are subject to change without notice.

Trademarks

FCC Requirements

Verilink is a registered trademark of Verilink Corporation. Access System 2000, WANscope, VeriStats, and FrameStart are trademarks of Verilink Corporation.

Any named prod ucts herein are trademarks of their respective companies.

This equipment has been tested and found to comply within the limits for a Class A digital device pursuant to Par t 15 of the Federa l Communic ations C ommissio n (FCC) rules. These limits are designed to pro vide protection against harmful interference in a commercial environment.

This equipment generates, uses, an d can radiate radio frequency energy and, if not installed and used in accord ance with the user manual, can cause harmful interference t o radio communications.

There is no guarantee that interference will not occur in a particular installation. If this equipment causes harmful interference to radio or television reception—which can be determined by turning the equipment off and on—try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna.

•

Increase the separation between the equipment and receiver.

•

Connect the equipment into an outlet on a circuit different from that to whi c h

•

the receiver is connected. Consult the dealer or an experienced radio/TV technician for help.

•

This equipment complies with Part 68 of the FCC Rules. On the rear, side or bottom of the unit is a label that contains the FCC registration number and other information. If requested, provide this information to the telephone company.

All direct connecti ons to the ne twork lines m ust be made usi ng standard plugs

•

and jacks (compliant with Part 68). The following tables list the applicable registration jack universal order codes (USOCs), facility interface codes (FICs), and service order codes (SOC s). These are required to order service from the telco.

For T1 interfaces:

Port ID REN/SO C FIC USOC

1.544 Mbit/s SF

1.544 Mbit/s SF, B8ZS

1.544 Mbit/s ANSI ESF

1.544 Mbit/s ANSI ESF, B8ZS

For DDS interfaces:

Port ID REN/SO C FIC USOC

56 kbit/s 64 kbit/s

If the unit appears to be malfunctioning, inform the telco and disconnect it

•

from the network lines until the source of trouble is determined to be your equipment or the telephone line . If your equipment needs repair, it should not be reconnected until it is repaired.

ii Verilink APS 2000 User Ma nual

6.0N 04DU9 -BN

6.0N 04DU5 -56

04DU9 -DN 04DU9 -1KN 04DU9 -1SN

04DU5 - 64

RJ-48C jack

RJ-48S jack

The unit has been designed to prevent harm to the network. If the telephone

•

company finds that the equipment is exceeding tolerable parameters, it can temporarily disconnect service. In this case, the telephone company will provide you advance notice if possible.

If the telephone company alters its equipment in a manner that can affect the

•

use of this device, it must give you warning so that you have the opportunity to maintain uninterrupted service. You will be advised of your right to file a complaint with the FCC.

No customer is authorized to repair this equipment, regardless of warranty

•

status. All repairs must be performed by Verilink or an authorized agent. It is the responsibility of users requiring service to report the nee d for service to Verilink or to one of our authorized agents.

Lithium Battery

English

Français

The lithium battery referred to in the following notices is contained inside the clock chip.

DANGER!

The battery can explode if incorrectly replaced! Replace only with the same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the manufacturer’s instructions.

DANGER!

To avoid electrical shock in case of failure, the power supply must be installed by a professional installer. The terminal labeled with the ground symbo l ( ) on the power supply must be connected to a permanent earth ground.

CAUTION!

Interconnecting circuits must comply with the requirements of EN60950:1992/A2:1933 Section 6.2 for telecommunications network voltages (TNV) circuits.

ATTENTION!

Une explosion peut se produire si la batterie est remplacée d’ une façon incorrecte! Remplacez-la seulement avec le même modêle de batterie ou un modèle équivalent selon les recommendations de manufacture. Disposez de les batteries usées selon les instructions de manufacture.

ATTENTION!

Pour éviter choc électrique en cas de insuccès, la provision de pouvoir doit êtré installé par un installeur professionnel. Le terminal de la provision de pouvoir, marqué du symbol de terre, ( ) doit connecté à un circuit de terre permanent.

ATTENTION!

Les circuits doivent êtré interconnectés de manière à ce que l’ équipement continue a êtré en agrément avec “EN60950:1992/A2:1933, Section 6.2, pour les circuits de voltage de liaisons d’ échanges (réseau) par les télécommunications (TNV),” après les connections de circuits.

Españole

PELIGRO!

La bateria puede exp lotar si s e reempla za incorr ectamente. Reemp lace la bateri a con el mismo tipo de bateria ó una equivalente recomendada por el manufacturero. Disponga de las baterias de acuerdo con las instrucciones del manufacturero.

PELIGRO!

Para evitar contacto con circuitos que electrocutan, la fuente de alimentación debe ser instalada por un técnico profesional. La terminal de la fuente de alimentación marcada con el símbolo de tierra ( ) debe ser con ectada a un cir-

Verilink APS 2000 User Manual iii

cuito de vuelta por tierra permanente.

CIRCUITOS A INTERCONECTARSE

Circuitos que se int erc on ecta n a la re d de telecomunicaciones deben h acer se d e tal manera que cumplan con los requisitos estipulados en las especificaciones “EN60950:1992/A2:1933, Sección 6.2, para los voltages de circuitos interconnectados a la Red de Telecomunicaciones (TNV),” despues de terminar las connecciones entre los circuitos.

Deutsch

Canadian

Requirements

VORSICHT!

Explosionsgefahr bei unsachgemäßem Ersetzen der Batterie! Batterie gleichen Typs und gleicher Qua lität ben utzen, wie v om Hersteller empfohlen. Entsor gung der Batterie nach Anweisung des Herstellers!

VORSICHT, GEFAHR!

Um keinen Schlag zu erhalten beim Versagen der electrischen Anlage, muss der Stromanschluss von einem Elektriker vorgenommen werden. Der elektrische Pol, versehen mit dem Erdsymbol ( ) muss am Stromanschluss permanent geerdet sein.

VORSICHT!

Schaltungen, die in den Geräten zusammengeschaltet sind, müssen weiterhin den Vorschriften EN60950:1992/A2:1933, Absatz 6.2 für Telecommun ications Netz Spannung (TNV) Schaltkreize entsprechen.

This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications.

Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux appareils numé riques (de la cl ass A) prescrit es dans le Règlement sur le brouillage radioélectrique édicté par le ministère des Communications du Canada.

The Industry Canada label indentifies CS-03 certified equipment. This certification means that the equipment meets certain telecommunications network protective, operational and safety requirements. Industry Canada does not guarantee the equipment will operate to the user’s satisfaction.

Before installing this equipment, users should ensure that it is permissible to be connected to the facilities of the local telecommunications company. The equipment must also be instal led usin g an acce ptab le method of conn ecti on. In some cas es, the company’s inside wiring associated with a single line individual service may be extended by means of a certified connector assembly (telephone extension cord). The customer should be aware that compliance with the above conditions may not prevent degradation of service in some situations.

Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated by the supplier. Any repairs or alterations made by the user to this equipment, or equipment malfunctions, may give the telecommunications company cause to request the user to disconnect the equipment.

Users should ensure for their own protection that the electrical ground connections of the power utility, telephone lines and internal metallic water pipe system, if present, are connected together. This precaution may be particularly important in rural areas.

Caution:

should contact the appropriate electric inspection authority, or electrician, as appropriate.

Users should not attempt to make such connections themselves, but

Safety Precautions

This equipment is intended to be insta ll ed o nly in a Restricted Access Location that meets the following criteria:

Access can only be gained by service personnel or users who have been

•

instructed about the reasons for the restri ctions applied to the location and about any precautions that must be taken.

iv Verilink APS 2000 User Manual

Access can only be gai ned th rough th e use of a lock a nd ke y or ot her mea ns of

•

security, and is controlled by the authority responsible for the location.

When handling this equipment, follow these basic safety precautions to reduce the risk of electric shock and injury:

Follow all wa rnings and ins tructions marked on the pr oduct and in the

•

manual. Unplug the hardware from the w all outlet before cleaning. Do not use liquid

•

cleaners or aerosol cleaners. Use a cloth slightly dampened with water. Do not place this product on an u nstable cart, stand, or table. It may fall,

•

causing serious damage to the product. Slots and openings in the shelves are prov ide d for ve nti latio n to prote c t them

•

from overheating. These openings must not be blocked or covered. Never place this product near a radiator o r heat register.

This product should be op erated onl y from the t ype of power sou rce indicate d

•

on the marking label and manual. If you are unsure of the type of power supply you are using, consult your dealer or local power company.

Do not allow anything to rest on the power cord. Do not locate this product

•

where the cord will interfere with the free moveme nt of people. Do not overload wall outlets and extension cords, as this can result in fire or

•

electric shock. Never push objects of any kind into the shelves. They may touch dangerous

•

voltage points or short out parts that could result in fire or electric shock. Never spil l liquid of any kind on this equipment.

Unplug the equipment from the wall outlet and refer servicing to qualified

•

service personnel under the following conditions:

a. When the power supply cord or plug is damaged or frayed. b. If liquid has been spilled into the product. c. If the product has been exposed to rain or water. d.If the product has been dropped or if the cabinet has been damaged.

Product Warranty

Customer Service

Publications Staff

Verilink’s product warranty covers re pair or replacement of all equipment under normal use for a five-year period from date of shipment. Our in-house Repair Center services returns within ten working days.

Verilink offers the following services:

• System Engineers at regional sales offices for network design and planning assistance (800) 837-4546

• Technical Assistance Center for free 24x7 telephone support during install ation, maintenance, and troubleshooting (800) 285-2755 and support@verilink.com)

• To return a product, it must be assigned a Return Materials Authorization (RMA) number before sending it to Veril i nk for repa ir (800) 92 6- 0085 , ext. 228 2

• Maintenance contracts and leasing plans (800) 837-4546

• Technical Training on network concepts and Verilink products (800) 282-2755

and training@verilink.com

• Web site (www.verilink.com)

This manual was written and illustrated by Steve Rider. Contributing writers include: Marie Metivier, Theresa Lau, and Barbara Termaat.

Verilink APS 2000 User Ma nual v

vi Verilink APS 2000 User Manual

Overview

This manual describes the Verilink Automatic Protection Switch (APS 2000), a fully automatic, 1 for n, T1 protection switch component of the Verilink Access System 2000 (AS2000) product family.

The APS 2000 system automatically senses degrading or failed T1 lines and restores service to a protection line.

When the trouble clears, the system returns service to th e original working line, either automatically or manually. The protection line can carry low priority traffic which will be bumped if another T1 fails.

Alarms and control are provided both locally and remotely via SNMP or Telnet. APS 2000 consists of a software addition to Verilink’s T1 Access Cards (TACs) and software enhancements to the Verilink SNMP MIB.

Scope

•

This chapter presents an overview with theory of operation and illustrations of front and rear modules.

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Chapter 2, "Quick Setup" presents a sample configuration

procedure, as a guide to configuring the APS2000.

•

Chapter 3, "Configuration" presents a detailed listing of all

configuration options.

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Chapter 4, "Performance Monitoring" describes the

Performance Menu functions.

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Chapter 5, "Diagnostics" details the Diagnostics Menu

functions.

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Appendix A, "Specifications" lists technical details of the APS

2000 products.

Verilink APS 2000 User Manual

1

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Overview

Theory of Operation

Protection Groups

T1 Prioritization

An APS Protection Group is comprised of a T1 protection line and n working T1 lines.

To eliminate the possibility of cross switches, switching priority is built into the APS 2000 system.

Prioritization ensures that, during multiple line failures, both ends of the same line switch to the protection line. That line will be the failed line with the highest priority, as determined at the time of installation.

If a lower priority line has switched to the protection line and, subsequently, a higher priority line fails, the lower priority line is “bumped” back onto its original line, which is forced to carry service as best it can. By definition, the protection line has the lowest priority and cannot be switched if it has failed.

Figure 1-1 Prioritized sequence of CPEs = 1, 2, 3, 4

APS 2000

Switch Circuit

CPE 4

CPE 3

#4

in

#3

in

out

CSU 4

CSU 3

T1 #4

T1 #3

Switching Criteria

CPE 2

CPE 1

Low Priority

CPE

#2

in

#1

in

Protection

Circuit

out

CSU 2

CSU 1

Protection

CSU

T1 #2

T1 #1

T1 Protection Line

The priority system may also be overridden for maintenance purposes by placing higher priority lines in the

Inhibit

control

mode. Then lower priority lines can access the protection line.

There are four types of abnormalities which may cause a working line to switch to the protection line. These criteria are:

•

Errors and alarms

•

Abnormal network codes

•

Switch code

•

Removal of the CSU module

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Overview

Errors and Alarms

Abnormal Network

Codes

Switch Code

The errors and alarms which activate switching are loss of frame (LOF), Loss of Signal (LOS), high Bit Error Rate (BER), and high Bipolar Violations (BPV)s.

In addition to errors or degraded/failed T1 signals, APS 2000 specifically recognizes other service-affecting conditions which appear as clean T1 signals. These include loopbacks and injected test signals.

A loopback condition in the middle or far end of a circuit would appear to the near end as a clean si gn al . However, service is interrupted when loopbacks are present. Similarly, if a clean signal (from a test set, for example) was inje cted into one or both directions of transmission from the middle of a circuit, no alarms would be generated.

APS 2000 transparently sends a unique “network code” from each end of the system. The near-end and far-end codes are different and are automatically selected when the APS is in operation. If either end receives its own network code (indicating a loopback is present) or no network code (indicating “foreign signal” injection), the system will switch as if errors had been received.

All 1-for-n automatic protection switching systems must switch both ends of a circuit when a failure occurs in one or both directions of transmission. If the failure is in one direction only, the failed end must commu ni cate with the remote end to tell it to switch.

The APS 2000 system provides for two different selectable methods of communicating this “switch code” (and the unique Network Codes discussed above) to the far end to ensure end-to-end operability. This end-to-end operability is assured regardless of network topology or carrier-based transmission equipment. The methods are ESF Facility Data Link (FDL) and density bit. ESF FDL is the default and density bit is an option.

ESF Facility Data Link (FDL)

ESF FDL signalling is the normal (default) method of communicating switch code.

It sends a priority bit-oriented protocol (BOP) message (as defined in ANSI T1.403) to inform the far end when to switch and when to restore.

Using the FDL offers a number of advantages:

•

The messages are reserved for APS usage so the detection time may be kept short.

•

Payload loopback may be asserted without risk of single-ended restoration (“half switch”) due to a switched unit receiving its own clean signal.

Verilink APS 2000 User Manual

1

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Overview

APS uses a standards-based (non-proprietary) method of controlling switching events.

The potential disadvantage is that some network-based DACS systems do not provide end-to-end connectivity of the FDL. If the carrier’s network includes a DACS, the DACS must either be optioned for “through” FDL usage or the T1 must be routed around the DACS. If these options are not available, another method must be selected to communicate switch code.

56kb Density Bit signalling

This method relies on the fact that if one or more of the DS0 channels in a T1 system contain data at 56kbs, the eighth bit of the DS0 byte may be used as a communications channel. Normally, the eighth bit is forced to a “1” to ensure proper ones-density on the T1 signal, but this requirement may be waived under either of the following scenarios:

• If the network T1 is optioned for B8ZS, density is assured.

• If the network cannot be B8ZS for some reason, and only a single DS0 is used for the 56kbs + signalling bit, density can still be maintained by using the bit during frames where the frame bit is a “1.” The extra “1” in the frame bit allows one DS0 to be all zeros without violating the density rules as defined by ATT PUB 62411 and ECSA T1.403.

CSU Removal

The ESF FDL signalling method is the preferred method of communicating “switch code” and is se t by default. Density bit signalling may be selected if the system either does not use ESF lines, or if an older DACS system prevents ESF FDL continuity.

APS 2000 does not use, nor require , any form of “ common cont rol.” Each APS/CSU module is independent of other modules and its actions are independent of the actions of other modules (wit hin the scope of the priority system discussed above).

Even physical removal of a module does not affect the switching and restoral process. In the unlikely event of a failed module, the module may be removed and replaced without disrupting service to the effected DTE. If the module to be removed is associated with a working line, a normal switch to the protection line will occur at both ends. Once the module is reinstalled, a normal reset is allowed.

NOTE:

The far end module should not be in the

INHIBIT

control mode when removing a near-end module. When a module is removed at either end, the empty slot appears to the priority system as a failed line requesting to switch to the spare and is still part of the priority system. Make sure the spare is not being used by a higher priority line (or

INHIBIT

higher

priority lines) before removing a module.

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Overview

V.54 Channel Loopback and Test

T1 CSUs and APS systems normally process an entire T1 bitstream. Drop-and-insert DSU/CS Us however, are channelized and capable of loopback testing on just a portion of the T1 signal (one or more DS0 channels). Drop and insert devices contain multiplex logic and dataport interfaces and are, therefore, more costly than T1 CSUs.

Many systems utilize both T1 CSUs and drop and insert CSUs in the same circuit. For example, when physical access to a DS0 data signal is not required be tween two intermediate locati ons, the signal may still be dropped and inserted at the ends. Standar d CSUs may then be deployed at the intermediate locations, effect ing a cost savings. The drop-and-insert CSUs or routers at the circuit end-points usually provide for DS0 loopback testing (built into the port circuitry) to test a specific portion of the signal without disrupting the rest of the signal (other DS0s). However, without special circuitry, DS0 testing could not be initiated from an intermediate location where there was no drop and insert CSU .

The V.54 loopback option (V54LB) adds this special circuitry to an APS CSU. V54LB provides the required V.54 loop-up, loop-down, and channel test signal capabilities to initiate loopback and test of a user-selected DS0 channel or FT1 bundle, using drop-and-insert without requiring physical data port access. The V54LB option bridges the gap between a full drop-and-insert DSU/CSU and a standard T1 CSU by providing both T1 loopback/test and DS0 loopback/test.

User Interfaces

Craft / Telnet

APS 2000 includes standard T1 CSU functionality as well as protection switching functionality. A connection to one end of a system provides status and control of both ends of the circuit via the ESF FDL or density bit as discussed above.

APS 2000 provides both local and remote status indications and control capability. Front panel LEDs indicate status.

The SCC 2120 front panel port lab e l led driven ASCII interface (called the Craft interface).

Detailed status, alarm information and control, requires access to either the Craft interface or the embedded SNMP agent via the node’s SNMP Controlle r and Channel Service Unit (SCC 21 20).

The Craft interface is accessible by direct connection of a terminal emulator to th e session over a SLIP or Ethernet interface.

An automatic log-off function logs the operator off the node if no input command is entered within 15 minutes. The Craft inter f ace data rate is 19.2 Kbit/s.

RAFT

port on the SCC front panel or via a Telnet

C

RAFT

provides a menu

C

Verilink APS 2000 User Manual

1

-5

Overview

SNMP

System Hardware

Alternatively, the operator can use an SNMP manager (such as SunNet Manager or HP OpenView) via either a SLIP or Ethernet connection. Verilink’ s prop riet ary MIB augmen ts the stan dar d MIBs to provide the same management capabilities as Verilink’s Craft interface.

The SLIP and Ethernet connec tors are located on the CIM 2022 APS, which mounts to the back of the SCC 212 0, against the shelf midplane.

The SLIP connection runs at 9600Kbit/s and the Ethernet connection at 10 Mbit/s .

Every APS 2000 system node with full T1 protection switching consists of at least a shelf, a power supply, and modules with the appropriate cabling.

The APS 2000 Line Protection System works with either Multi-line or Dual-line shelves.

MLS 2200 Shelf

The MLS 2200 has 13 plug-in module slots. The two redundant power supplies provide power to all of the plug-in modules.

Figure 1-2 Multi-line Shelf (front view)

SCC 2120

With cabling, the control bus can be expanded to additional shelves for increased node capacity.

TAC 2110

(12 slots)

Power Supplies

Mounting Ear (each side of shelf)

More Information

For more information on power supplies and shelves, see the manual AS2000: The Basics.

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Overview

Channel Service Units

Node Controller Functions

Verilink offers two Channel Service Units (CSUs) for use with the T1 protection line application — the SCC 2120 and t he TAC 2110. The SCC 2120 provides node controller functionality in addition to all of the CSU functionality of the TAC 2110. Each node must have only one SCC 2120 module.

Connector Interface Modules (CIMs) provide network and DSX-1 equipment (EQUIP) connectivity to the SCC and TAC. The SCC 2120 uses the CIM 2022 APS, and the TAC 2110 uses the CIM 2010 APS.

NOTE:

Although the CSUs have additional functions related to channel distribution, use, and management, only those functions which are applicable to ful l T1 line protection switching will be discussed.

Each APS 2000 node consists of an SCC 2120 and all the associated circuit elements it controls. In the case of T1 line protection switching, all of these circuit elements are CSUs.

The SCC 2120 is typically located in the first slot of the first shelf of each node, and is also known as the “node controller.” The node controller provides the operator interface for each node. Using either the ASCII terminal or SNMP Manager, an operator can acc e ss the modules in the APS 2000 node for T1 network administratio n and maintenance. This is illustrated in Figure 1-3.

Figure 1-3 SCC Node Controller with Operator Interfaces

SNMP

Network Manager

(MOM)

CSU Functions

Local ASCII

Terminal

SLIP

Ethernet

LAN

IP over T1

The CSU provides T1 circuit termination at the customer premises

RS-232D

Node

Controller

circuits

CSU

circuits

SCC 2120

and connects the customer’s DS X-1 equipment to the network, regenerating the data received from the line.

Operator Interface

RS-485 Controller Bus

TAC

2110

Other units in nod

TAC 2110

RS-485 bus expansion to other shelves in node

Verilink APS 2000 User Manual

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Overview

Each CSU can be configured for the desired mode of operation. The configuration data is stored in each module and can be retrieved or edited.

Network

Management

The Access System 2000 performs the fol l owing network management-related functi o ns:

Performance Data

Generates and stores T1 circu it perf ormanc e data. An oper ator ca n retrieve this data for circuit analysis and maintenance.

•

Generates non-service-affectin g T1 performan ce data requi red by AT&T TR-54016 and ANSI T1M1 .3 .

•

Generates non-service-affecting performance report messages consistent with ANSI T1.403-1989.

Network Transmission Functions

The CSU performs network transmission functions such as:

• T1 signal framing and encoding

• Line coding conversion

• Network density enforcement

• Performanc e data processing and storage

Circuit

Maintenance

• CSU status and alarm rep orting

• T1 test signals and loopbacks for circuit diagnostics and maintenance

Access System 2000 equipment provides several built-in features that make circuit maintenance, diagnostics, and testing possib l e:

Loopbacks

Four different signal loopbacks are av ailable for rapid T1 circuit trouble isolation. Each of these loopbacks can be activated or deactivated by an operator.

Test signa ls

Each CSU is capable of applying one of four test signals to the circuit through operator-issued commands.

•

Service-affecting diagnostics, testing, and maintenance in accordance with AT&T Publication 54016.

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Overview

Connector Interface Module

Controls and indicators

The SCC 2120 uses a CIM 2 022 APS to make its connections to the network, equipment, netwo rk management, timing, and alarm signalling cables.

The CIM 2022 APS modules is mounted from the back of the shelf. The CIM 2022 APS provides the following major functions for its SCC:

•

CSU to Network connection (RJ-48C connecto r)

•

CSU to Equipment connection (RJ-48C connector)

•

APS IN

•

APS OUT

•

ASCII, SLIP, and Ethernet Interfaces

connection

The SCC has three LEDs, three pairs of bantam jacks, a 6-pin modular jack, two thumb whee l switch es, and a push- but ton swi tch.

NOTE:

The 6-pin modular jack on the TAC 2110 is not used. This jack is only functional for an ASCII terminal interface on the SCC 2120.

Figure 1-4 SCC 2120 and TAC 2110 Controls and Indicators

SCC 2120

EXE

0 2

FUNCTION

EQPT

STAT

NET

CRAFT

IN

OUT

IN

OUT

NET

EQPT

NET

MON

Thumbwheel Switches and Command Execution

Push button

Equipment, CSU

Status and

Network LEDs

Modular Jack for ASCII Terminal Connection

Signal Access

Jacks (Bantam)

NOT

USED

OUT

NET

EQPT

TAC 2110

EQPT STAT NET

IN

EQPT

NET

MON

Verilink APS 2000 User Manual

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Overview

System Cabling Requirements

This section describes the various cables used to connect all the components of the Automatic Protection Switch application. These are shown in Figure 1-5.

Required Cables

The tables and figures below describe types of cables, indicate cable connections and give pinou t infor m ation f or re q uire d ca ble s.

Table 1-1 Cables Used with APS 2000

Cable Description

T1 network interface cable

Priority cable

Controller bus expansion cable

Customer Premises Equipment cable

Craft interface cable

SLIP cable

These T1-grade transmission cables connect the SCC 2120 (via the CIM 2022 APS ) or TAC 2110 (via the CIM 2010 APS) to the T1 network.

This cable goes from the APS OUT po rt of one CIM to the APS I N port of the next lower priority CIM. Additionally, for the CIM 2022 APS in the first shelf’s slot, it connects the EQPT port and the APS IN port on that CIM.

The controller bus expansion cable has a 6-pin, mini-modular male connector (RJ-11) on each end. This cable extends network management from Shelf 1 (the SC C 2120 CSU/Contro ller) to other shelves in the node.

This cable connects the DSX-1 equipment to the CIM 2010 APS connector.

This cable connects an ASCII terminal or a PC to the Craft interface port on the SCC 2120.

This cable connects from the CIM 2022 APS terminal server or modem, providing a SLIP interface.

connector to the

SLIP

EQPT

Ethernet transceiver

Ethernet cable

Cable Type Part Number Description

T1 Network Interface 458-501767-xxx RJ-48C (male) to Open Wire

458-501768-xxx RJ-48C (male) to DA-15 (male) 458-501769-xxx RJ-48C (male) to RJ-48C (m ale)

Controller Bus Expansion

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458-501761-002 RS-485, 20-inch, RJ-11 male connectors

458-501761-004 RS-485, 40-inch, RJ-11 male connectors 458-501761-006 RS-485, 60-inch, RJ-11 male connectors

This adapter connects the CIM 2022 APS cable via 10BaseT or 10Base2.

This cable connects the Ethernet transceiver to the LAN.

Table 1-2 Cables Available from Verilink

THERNET

E

port to the Ethernet

Cable Type Part Number Description

APS Priority 458-502572-001 RJ-48C (male) to RJ-48C (male), 18 inches

Overview

Ethernet Transceiver 591-502386-001 Ethernet transceiver, in cl ud ed with eac h SCC

2120. Identical to those used with Apple Macintosh® computers.

Craft Interface 458-501788-008 Craft MiniMod to DB-25 (Female), 8 foot

458-102119-008 Craft MiniMod to DB-9 (Female), 8 foot

Figure 1-5 APS 2000 Cable Connections

This figure shows the cables required to set up this application in a hypothetical two-shelf node. Numbered cables are identified and detailed in Figure 1-6.

Customer Premise

Equipment (CPE)

T1 Service

Provider

Protection Line

Customer Premise

Equipment (CPE)

Low Priority

3

1

CIM

TAC 2110

MLS 2200 #1

3

1

CIM

SCC 2120

Shelf 1, Slot 1

Operator interface options

LAN

Router

7

5

6

2

Ethernet

10 Mbps

SLIP

19.2 kbps

4

19.2 kbps

Terminal

Server

ASCII Terminal

SNMP

Manager

Customer P r emise

Equipment (CPE)

KEY:

Cable Distance Limitations

TAC 2110

CIM

MLS 2200 #2

1

3

Pinouts for these connectors are detailed in this chapter Indicates connection for the T1 protection line

P

Each number indicates a specific cable type

1

All shelves in the same Access System 2000 node must be within 12 cabling feet of each other.

Verilink APS 2000 User Manual

1

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Overview

Each CSU must be within the following cable distances from the connected equipment at the customer premises:

CSU attached to: Distance from CSU

DSX-1 equip ment 655 feet, maximum First network repeater 3000 feet, maximum ASCII terminal

(RS-232D)

These distances are critical for accurate system operation.

Cable Schematics

The following cable schematics will provide you with the information to assemble any of the shelf interconnection cables.

T1 network

interface cable

Figure 1-6 Network Interface Cable Schematics

RJ-48C to RJ-48C

(PN: 458-501769-xxx)

The network interface cables are used to connect the SCC 2120 via the CIM 2022 APS to the T1 network.

To/From

CSU

50 feet, nominal

RJ-48C

Male

4 5 7

1

2

8

Ring Tip

Ring 1 Tip 1

Twisted

Pairs

RJ-48C

Male

4 5 7

1 2

8

To/From Networ

RJ-48

Male

4

RJ-48C to DA-15 (15-Pin

(PN: 458-501768-xxx)

RJ-48C to Open Wires

(PN: 458-501767-xxx)

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-12 Verilink APS 2000 User Manual

To/From

CSU

To/From

CSU

5 7

1 2

8

RJ-48C

Male

4 5 7

1 2

8

Twisted Ring Tip

Ring 1 Tip 1

Pairs

Blue (R) Wht/Blue (T

Orn (R1) Wht/Orn (T1)

DA-1

Male

Twisted

Pairs

9 1

To/From Networ

11

3

To Networ

From Networ

Overview

Controller Bus

Expansion Cable

Craft Interface

Cable

The Controller Bus Expansion Cabl e extends network management from shelf to shelf. Figure 1-7 illustrates where the cable leads attach to the 6-pin mi ni-modular (RJ-11) connectors.

Figure 1-7 Controller Bus Expansion Cable Schematic

RJ-11 Male RJ-11 Male

From the current shelf in the node

2 5 6

5

To the next shelf in the

2

node

1

The Craft interface cable is used to connect the ASCII terminal or emulator to the 6-pin modular connector, labelled

C

RAFT

, on the

front of the SCC 2120.

Figure 1-8 Craft Interface Cable (DB-25) Schematic

6-Pin

Mini-Mod

Male

3 4 5

To Craft port on SCC 2120 front panel

To ASCII terminal

DB-25

Female or Male

2 3 7

Figure 1-9 Craft Interface Cable (DB-9) Schematic

DB-9

Female or Male

To PC COM portl

3 2 5

6-Pin

Mini-Mod

Male

3 4 5

To Craft port on SCC 2120 front panel

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1

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Overview

DSX-1 Equipment

Cable

This cable connects the DSX-1 equipment to th e connector labelled,

EQPT.

Figure 1-10 DSX-1 Equipment Cable Schematics

RJ-48C to RJ-48C

(PN: 458-501766-xxx)

RJ-48C to DA-15 (15-Pin

(PN: 458-501765-xxx)

RJ-48C to Open Wires

(PN: 458-501767-xxx)

To/From

CSU

To/From

CSU

To/From

CSU

RJ-48C

Male

4 5 7

1

2 8

RJ-48

Male

4 5

7 1 2

8

RJ-48C

Male

4 5 7

1 2

8

Twisted

Pairs

Ring Tip

Ring 1 Tip 1

Twisted Ring Tip

Ring 1 Tip 1

Pairs

Blue (R) Wht/Blue (T

Orn (R1) Wht/Orn (T1)

RJ-48C

Male

DB-15

Male

Twisted

Pairs

1 2 8

4 5

7

11

3 2

9 1

To/From Equipment

To Equipment

From Equipment

1

-14 Verilink APS 2000 User Manual

Overview

NMS Cable

The Network Management System (NMS) cable connects a terminal server or modem to the Management Port (IN) connector on the CIM 2022 APS to provide a SLIP interface.

Figure 1-11 Network Management Interface (for SLIP) Cable Schematic

P1, DB-25

Female RD TD

CTS RTS DTR SG DSR DCD

PC

3 2

5

20

7 6 8

1

Chassis Ground

To

PN: 458-501772-008

P2, DB-9

Female

3 TD

2RD 7RTS 8CTS 6DSR 5SG

1DGD 4DTR

(Case)

APS Priority Cable

CSU Configuration Options

The APS priority cables connect the APS OUT port on a CIM to the APS in port of the next lower priority line’s CIM. All APS CIMs are daisy-chained in this manner.

Figure 1-12

APS Priority Cable Schematic

RJ-48C

Male

1

To/From

CIM

2 7

4 5

8

RJ-48C to RJ-48C

(PN: 458-502572-001)

Ring Tip

Ring 1 Tip 1

Twisted

Pairs

RJ-48C

Male

1 2 8

4 5

7

To/From CIM

The SCC and TAC contain numerous software-programmable CSU configuration options. These options are set by an ASCII terminal operator or using SNMP.

The most recent CSU configuration option settings of an SCC or TAC are saved in nonvolatile storage. If the SCC or TAC is stored off-line (not powered up), option storage is maintained by a RAM backup battery for at le ast 3 months.

Verilink APS 2000 User Manual

1

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Overview

1

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Chapter

2

Quick Setup

This chapter provides a step-by-step procedure for installing the minimum configuratio n required to begin using the APS 2000. Complete details on all configuration options are provided in

Chapter 3, "Configuration".

Installation Procedure

For each node, follow the procedure below.

Step by Step

1. Make sure you have completed all the physical installation

2. If the node has more than one shelf, extend the TABS

procedures described in the manual AS2000: The Ba sics.

controller bus. See the manual AS2000: The Basics.

3. Make the connections for each CSU. (See Connecting the CIM s). a. Connect the T1 lines to the CIM

b. Connect the customer equipment to the CIM EQPT port. c. Connect the APS priority cable(s).

4. Connect the SLIP and /o r Ethern et net work mana gement ca bl es

to the CIM 2022 APS in Shelf 1 Slot 1 of the node. (See

Figure 2-2, “Rear view of CIM interconnections”.)

5. Apply system power.

6. Connect a terminal or PC to the port labelled

of the SCC 2120 module. Use one of the two types of Craft cable:

a. P/N 458-102119-008, DB-9 to RJ-11—(Figure 1-9) used with

notebook or other computers which present a DB-9 COM port.

b. P/N 458- 501788- 001, D B-25 to RJ-1 1—(Figure 1-8) used with

terminals or computers which present a DB-25 RS-232 connector.

7. Configure your terminal or terminal program for: a. A data rate of 19.2Kbit/s

NETWORK

port.

RAFT

C

on the front

b. N o parity c. One stop bit

Verilink APS 2000 User Manual

2

-1

Quick Setu p

d. No flow control (both hardware flow control and X-on/X-off

flow control must be di sabled).

NTER

8. Press the

key. The prompt

E

9. Log on to the ASCII inter face by typing "craft" at th e

prompt and pressing

NTER

E

to get the

pSH+>

is displayed.

YOUR PASSWORD?

pSH+>

prompt. If you’re accessing the node for the first time, press

NTER

(initially there is no passwo rd). The SCC 2120

E

Menu

is displayed.

10. Use the "O" command to access the

11. Use the "E" command to access the

Administration Menu

Ethernet Configuration

Main

.

submenu.

12. Set the node’s Ethernet IP address, and subnet mask as required for your local LAN segment. Use Ethernet type. Return to the

Administr a tion Menu

Ethernet/DIX

using the

for the

"X" command.

13. Reboot the SCC 2120 using the "B" command. Then repeat steps 8 and 9 to return to the

14. Use the "C" command to access the

Main Menu

.

Configuration Menu

.

15. Use the "W" command to set the correct framing type for your DSX-1 equipment (first of two choices) and T1 facility (second choice). For this example we will assume you wish to connect a D4/AMI PBX port to an ESF/B8ZS line. Select

3(SF,ESF)

.

16. Use the "F" command to select the format (line coding), for this example select

2(AMI,B8ZS)

.

17. Document your installation, you may use th e worksheet in

Figure 2-1.

18. Perform the initialization procedure described in Initializing

the APS 2000 in Chapter 3.

2

-2 Verilink APS 2000 User Manual

Figure 2-1 Multi-Line Shelf Worksheet

T1 Line Protection Switch: Multi-Line Shelf Worksheet

Node ID ______________ Shelf Number ____of ____ Operator interface (circle): SLIP / Ethernet / ASCII terminal

Quick Setu p

Slot

1 2 3 4 5 6 7 8

9 10 11

Module

Type

SCC NA P 2022 APS TAC W 2010 APS

Priority

(1-N)

Line

Type

CIM/DIM

Type

Circuit Name/

Number

Cables required

Type Length

APS

Control

Mode

12 13

14 Power Supply

15 Power Supply

AC slot B breaker#_____________

AC slot A breaker#_____________

DC slot B fuse #_________

DC slot A fuse #__________

Verilink APS 2000 User Manual

2

-3

Quick Setu p

Connecting the CIMs

After installing the CSUs into the shelves, connect each module to the external customer premise equipment. These connections are made at the associated CIM 2022 A PS or CIM 2010 APS in back of the shelf.

Figure 2-2 Rear view of CIM interconnections

CIM 2010 APS

CIM

2022

APS

To

Ethernet

Installing the Protection Line (Slot 1):

1.

Plug the T1 protection line (P1) into the Network Port of the CIM 2022 APS in Slot

1.

2.

Run an RJ-48 cable from the

EQPT

Port of

the CIM 2022 APS to its APS IN port.

3.

Connect the APS CIMs in your shelf by cabling the APS OUT port on the Slot 1 CIM to the APS IN port on the next APS CIM. Continue daisy-chaining APS OUT ports to APS IN ports for all the TACs on your shelf. Leave the APS OUT port on the lowest priority CIM empty.

NOTE: Both ends of the T1 protection group must have the same priority cabling sequence.

Making the network management connections

Use

1.

Management Port (IN)

for SLIP con-

nection.

Use the

2.

Management Extension

port for

Ethernet connection.

3.

Use the Craft interface to configure IP addresses.

T1 Line (L2)

REV *

APS OUT

APS IN

EQPT EXT TIMING NETWORK

REV *

T1 Protection Line (P1)

NETWORK

APS OUT

To Low Priority CPE

EQPT ETHERNETEXT TIMING

SLIP connection

SLIP

9-pin connector

Ethernet adapter

(10BaseT and 10Base2 connections)

APS priority cables

part numbe

458-502572-001

To

SLIP peer

2

-4 Verilink APS 2000 User Manual

Slot 1Slot 2

Chapter

3

Configuration

You can configure the node using either SNMP or the Craft interface. You can access the Craft interface by telnettin g over a SLIP or Ethernet interface. You can also access the Craft interface locally by direct connection to a terminal or a PC running a terminal program.

Configuring the system

Configure the SCC 2120 using the Craft interface. This interface presents identical menus via direct connection or a Telnet session.

Important notes

When you first install the card, you must configure certain IP address and related param e ters via the Craft port on the SCC 2120 front panel. These steps are listed in the section "Logging on" below.

Logging on

Once you configure the IP address, you can access the Craft interface to make subsequent configuration changes, using either a direct connection or a Telnet session.

1. Ensure that your entries are spelled correctly and that the options you choose are consistent with the application you are setting up.

2. The screens do not refresh automatically after you enter a command. To view the revised screen, you must press refresh. Once you enter a command, the word appears at the end of the prompt time to remind you to refresh the screen for updated feedback.

To access the APS 2000 node from the follows:

1. Configure your terminal or terminal program f or:

a. A data rate of 19.2 Kbit/s b. N o parity c. One stop bit

RAFT

port, proceed as

C

(UPDATE)

NTER

E

to

d. No flow control (both hardware flow control and X-on/X-off

flow control must be disabled)

Verilink APS 2000 User Manual

3

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Configuration

RAFT

2. Connect the terminal or PC to the port labe l le d

C

on the front of the SCC 2120 module. Use one of the two types of Craft cable:

a. P/N 458-102119-008, DB-9 t o RJ-11—used with notebook or

other computers which present a DB-9 COM port.

b. P/N 458-501788-001, DB- 25 to RJ-11—used with terminals

or computers which present a DB- 25 R S-232 connector.

3. Press the

NTER

key. The prompt

E

4. Log on to the Craft interface by typing "craft" at the prompt and pressing

NTER

E

to get the

prompt. If you’re accessing the node for the first time, press

Initially there is no password.

5. If you have set a password, then type the correct password (up to 6 characters, including spaces). The screen will display placeholders (

Main Menu

The

Table 3-1 SCC 2120 Main Menu

-- VERILINK SCC NODE CONTROLLER at[1,1]: FW Rev 3.05, May 26, 1999. --

-- VERILINK SCC NODE CONTROLLER at[1,1]: FW Rev 3.05, May 26, 1999. -- -- VERILINK SCC NODE CONTROLLER at[1,1]: FW Rev 3.05, May 26, 1999. -FLASH BANK: A Serial Number: 00520710

FLASH BANK: A Serial Number: 00520710

FLASH BANK: A Serial Number: 00520710FLASH BANK: A Serial Number: 00520710 Ethernet Address: A0:6A:00:07:F2:06:

Ethernet Address: A0:6A:00:07:F2:06:

Ethernet Address: A0:6A:00:07:F2:06:Ethernet Address: A0:6A:00:07:F2:06: Slip Local IP Address: 0.0.0.0, Subnet Mask: 0.0.0.0

Slip Local IP Address: 0.0.0.0, Subnet Mask: 0.0.0.0

Slip Local IP Address: 0.0.0.0, Subnet Mask: 0.0.0.0Slip Local IP Address: 0.0.0.0, Subnet Mask: 0.0.0.0 Ethernet Local IP Address: 192.94.45.242, Subnet Mask: 255.255.255.0

Ethernet Local IP Address: 192.94.45.242, Subnet Mask: 255.255.255.0

Ethernet Local IP Address: 192.94.45.242, Subnet Mask: 255.255.255.0Ethernet Local IP Address: 192.94.45.242, Subnet Mask: 255.255.255.0 SITE NAME: SCC NODE ID: 372

SITE NAME: SCC NODE ID: 372

SITE NAME: SCC NODE ID: 372SITE NAME: SCC NODE ID: 372 <- SLOT ->

<- SLOT ->

<- SLOT -> <- SLOT -> SHELF 1 2 3 4 5 6 7 8 9 10 11 12 13

SHELF 1 2 3 4 5 6 7 8 9 10 11 12 13

SHELF 1 2 3 4 5 6 7 8 9 10 11 12 13 SHELF 1 2 3 4 5 6 7 8 9 10 11 12 13 1 DL [A] A

1 DL [A] A

1 DL [A] A 1 DL [A] A 2

2

2 2 3

3

3 3 4

4

4 4 KEY: C = CSU, D = DIU, F = DIU/DDS, R = SRD, I = IDCSU, T = TU, A = APS,

KEY: C = CSU, D = DIU, F = DIU/DDS, R = SRD, I = IDCSU, T = TU, A = APS,

KEY: C = CSU, D = DIU, F = DIU/DDS, R = SRD, I = IDCSU, T = TU, A = APS, KEY: C = CSU, D = DIU, F = DIU/DDS, R = SRD, I = IDCSU, T = TU, A = APS, B = DIU/DBU, S = SMDS, L = HLM

B = DIU/DBU, S = SMDS, L = HLM

B = DIU/DBU, S = SMDS, L = HLM B = DIU/DBU, S = SMDS, L = HLM

will appear.

******

) as you type the password. Press

pSH+>

is displayed.

YOUR PASSWORD?

pSH+>

NTER

E

NTER

.

S) shelf/slot D) diagnostics

S) shelf/slot D) diagnosticsS) shelf/slot D) diagnostics N) near element O) node administration

N) near element O) node administration

N) near element O) node administrationN) near element O) node administration F) far element M) monitor alarms (OFF)

F) far element M) monitor alarms (OFF)

F) far element M) monitor alarms (OFF)F) far element M) monitor alarms (OFF) C) configuration A) view alarm buffer

C) configuration A) view alarm buffer

C) configuration A) view alarm bufferC) configuration A) view alarm buffer P) performance X) log off

P) performance X) log off

P) performance X) log offP) performance X) log off [1,1] NEAR TAC 2110 >

[1,1] NEAR TAC 2110 >

[1,1] NEAR TAC 2110 >[1,1] NEAR TAC 2110 >

3

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Table 3-2 SCC 2120 Main Menu Commands

Menu Option Description Instructions

Configuration

S) shelf/slot Used to navigate from module

N) near element Selects the local node. Used to return from a far element session. F) far element Selects the node at the remote

C) configuration Selects the

P) performance Selects the D) diagnostics Selects the O) node

administration M) monitor alarms

(OFF)

A) view alarm buffer Displays alarm buffer. A history of recent alarms is displayed. X) log off Exits the

to module within a node.

end of the T1 circuit connected to the current module, functions only if ESF FDL has continuity.

Configuration

Menu

.

Performance Menu Diagnostics Menu

Selects the

Administration Menu

Toggles on/off the monitor alarms function.

Node

Main Menu

.

. Returns to

Enter the shelf number and slot number of the desired module, use a comma delimiter (1,2).

With version 3.02 or higher SCC firmware, you can navigate from module to module in the remote node, earlier firmware versions only allowed access to the remote CSU module. The password required for this access is "800far".

See Figure 3-7 and Table 3-5 below.

.See Chapter 4 of this manual.

.See Chapter 5 of this manual.

See Figure 3-1 and Table 3-3 below.

If monitor alarms is ON, alarm messages are displayed on the Craft interface as they occur.

No alarm messages are displayed if monitor alarms is OFF.

pSH+>

pSH+>pSH+>

prompt, the TCP/IP shell.

Node Administration

In addition to the T1 CSU and Automatic Protection Switch functions, the SCC 2120 i s also an SNMP nod e con troll er. T he

Administration Menu

configure site, Ethernet and SLIP address information. Some functions on the

firmware upgrade procedures.

Node Administration Menu

The SCC 2120

Most of the commands on the documented in Table 3-3 below.

Some of the menu options on the produce submenus with detailed selections, for instance the

Modem Configuration Menu

, and submenus beneath it, are used to

Node Administration Menu

Main Menu

. Figure 3-1 shows the options presented.

Node Administration Menu

is detailed in Table 3-4.

Node

support

is accessed by selecting O on the

are

Node Administration Menu

will

Verilink APS 2000 User Manual

3

-3

Configuration

Figure 3-1 Node Administration Menu

--- NODE CONTROLLER MENU ---

--- NODE CONTROLLER MENU --- --- NODE CONTROLLER MENU ---

T) time

T) time T) time D) date

D) date

D) date D) date I) node id

I) node id

I) node id I) node id N) site name

N) site name

N) site name N) site name A) Slip Configuration

A) Slip Configuration

A) Slip Configuration A) Slip Configuration E) Ethernet Configuration

E) Ethernet Configuration

E) Ethernet Configuration E) Ethernet Configuration M) Modem Configuration

M) Modem Configuration

M) Modem Configuration M) Modem Configuration O) IP Gateway

O) IP Gateway

O) IP Gateway O) IP Gateway H) trap host ip address

H) trap host ip address

H) trap host ip address H) trap host ip address C) community string (read)

C) community string (read)

C) community string (read) C) community string (read) W) community string (write)

W) community string (write)

W) community string (write) W) community string (write) F) flash download

F) flash download

F) flash download F) flash download B) boot

B) boot

B) boot B) boot R) reset com ports

R) reset com ports

R) reset com ports R) reset com ports S) node controller status

S) node controller status

S) node controller status S) node controller status P) set privileged password

P) set privileged password

P) set privileged password P) set privileged password U) set unprivileged password

U) set unprivileged password

U) set unprivileged password U) set unprivileged password Y) element download

Y) element download

Y) element download Y) element download X) exit menu

X) exit menu

X) exit menu X) exit menu

[1,1] NEAR TAC 2110 >

[1,1] NEAR TAC 2110 >[1,1] NEAR TAC 2110 >

If any changes are made to the Ethernet or SLIP configurations, those changes do not take effect until the module is rebooted.

Rebooting an SCC 2120 by using the boot command has no effect on user data passing through the SCC 2120 module.

NOTE:

The SLIP IP address and the Ethernet IP address

must

different network segments in terms of the subnet masks in use. If the SLIP and Eth ernet addresses are set to reflect the same network segment an error message “Sendto: new socket failed” will repeat constantly until the error is corrected and the SCC 2120 is rebooted.

Table 3-3 Node Administration Commands

Menu Option Description Instructions

T) time Sets the time of

day. D) date Sets the date. Enter new date (mm-dd-yy): — use format shown. I) node id Sets a numeric

identifier.

Enter new time (hh:mm:ss): — use the format shown.

Maximum field length = ten digits, distinguishes one node from another, each node in a network must have a unique node id.

reflect

3

-4 Verilink APS 2000 User Manual

Menu Option Description Instructions

Site Name: Tech Pubs SCC 2120 Change (Y/N)?

N) site name Sets an alpha-

numeric identifier

used to tell one

node from another.

A) Slip Configuration Calls a submenu

which is used to

configure the RS-

232 electrical, DB-9

physical, Serial Line

Internet Protocol

port on the rear

connector module.

Site Name: Tech Pubs SCC 2120 Change (Y/N)?

Site Name: Tech Pubs SCC 2120 Change (Y/N)?Site Name: Tech Pubs SCC 2120 Change (Y/N)?

selected, a second prompt appears:

New Site Name (40)

New Site Name (40)New Site Name (40)

alpha-nume ri c characters.

---- host configuration for sli p ----

---- host configuration for sli p ---- ---- host configuration for sli p ----

L) Slip Local ip address : 192.94.46.222

L) Slip Local ip address : 192.94.46.222 L) Slip Local ip address : 192.94.46.222 P) Slip Peer ip address : 192.94. 46.101

P) Slip Peer ip address : 192.94. 46.101

P) Slip Peer ip address : 192.94. 46.101 P) Slip Peer ip address : 192.94.46.101 S) Slip Subnet Mask : 255.255.255.0

S) Slip Subnet Mask : 255.255.255.0

S) Slip Subnet Mask : 255.255.255.0 S) Slip Subnet Mask : 255.255.255.0 X) exit

X) exit

X) exit X) exit

: — enter a site name using up to 40

Configuration

— if yes is

E) Ethernet Configuration

M) Modem Configuration

SLIP may be used in

lieu of or along with

the Ethernet

connectivity

described below.

If SLIP will not be

used, leave the SLIP

Local IP address set

to 0.0.0.0.

Calls a short

submenu which is

used to configure

the AAUI-14

Ethernet connector

on the rear

connector module.

An Ethernet

transceiver which

supports both

10BaseT and

10Base2 is pro vided

with each SCC

2120.

Calls the Modem

Configuration

Menu.

— the SLIP Local I P ad d ress is for this SCC 2120. — the SLIP Peer address must be set for the trap host IP

address in curr ent SCC firmware . — the SLIP Subnet mask shown is for a TCP/IP class C

address, use the normal subnet mask conventions.

---- host configur ation for Ethernet ----

---- host configur ation for Ethernet -------- host configur ation for Ethernet ----

L) Ethernet Local ip address : 192.94.45.242

L) Ethernet Local ip address : 192.94.45.242 L) Ethernet Local ip address : 192.94.45.242 S) Ethernet Subnet Mask : 255.255.255.0

S) Ethernet Subnet Mask : 255.255.255.0

S) Ethernet Subnet Mask : 255.255.255.0 S) Ethernet Subnet Mask : 255.255.255. 0 T) Ethernet Type : Ethernet/DIX

T) Ethernet Type : Ethernet/DIX

T) Ethernet Type : Ethernet/DIX T) Ethernet Type : Ethernet/DIX X) exit

X) exit

X) exit X) exit

— the Ethernet local IP address is for this SCC 2120. — the Ethernet subnet mask shown is for a TCP/IP class C

address, use normal subnet mask conve nti ons. — the Ethernet type must be set to Ethernet/DIX.

Required only if SLIP will be used over a dial-up modem connection, see the table below.

O) IP Gateway Sets the address for

a device, usually a

router, used to

reach IP addresses

on a different

network segment.

Verilink APS 2000 User Manual

---- Internet Gateway Configuration ----

---- Internet Gateway Configuration ---- ---- Internet Gateway Configuration ----

G) Internet Gateway IP address : 128.0.0.0

G) Internet Gateway IP address : 128.0.0.0 G) Internet Gateway IP address : 128.0.0.0

— if no IP gateway is used, leave the default value as shown, if a gateway device is used, type “G” and enter the IP address of the gateway.

3

-5

Configuration

Menu Option Description Instructions

H) trap host ip address

C) community string (read)

W) community string (write)

F) flash download Used to upgrade

B) boot Reboots (resets) the

Used to configure IP

addresses fo r up to

four SNMP

managers to which

alarm information

(trap messages) will

be sent.

Set number of trap

hosts equal to the

number of IP

addresse s us e d .

SNMP community

string, a

rudimentary

password.

SNMP community

string, a

rudimentary

password.

SCC firmware.

SCC 2120.

---- host configuration for traps ----

---- host configuration for traps ---- ---- host configuration for traps ----

N) Number of trap hosts : 1

N) Number of trap hosts : 1 N) Number of trap hosts : 1

1) host 1 ip address : 192.94.45.111

1) host 1 ip address : 192.94.45.111 1) host 1 ip address : 192.94.45.11 1

2) host 2 ip address : 0.0.0.0

2) host 2 ip address : 0.0.0.0 2) host 2 ip address : 0.0.0.0

3) host 3 ip address : 0.0.0.0

3) host 3 ip address : 0.0.0.0 3) host 3 ip address : 0.0.0.0

4) host 4 ip address : 0.0.0.0

4) host 4 ip address : 0.0.0.0 4) host 4 ip address : 0.0.0.0 X) exit

X) exit

X) exit X) exit

Community string (Read): public Change (Y/N)?

Community string (Read): public Change (Y/N)?Community string (Read): public Change (Y/N)? Community string (64):

Community string (64):

Community string (64):Community string (64):

The current value for the read communi ty strin g is “pub lic” and a string of up to 64 characters can be entered.

Community string (Write): Right Change (Y/N)?

Community string (Write): Right Change (Y/N)?Community string (Write): Right Change (Y/N)? Community string (64)

Community string (64)

Community string (64)Community string (64)

The current value for the write community string is “right” and a string of up to 64 characters can be entered.

See the section “Configuration procedure” in this chapte r.

Current Bank: 'B'; flash bank to boot from (A or B)

Current Bank: 'B'; flash bank to boot from (A or B)Current Bank: 'B'; flash bank to boot from (A or B)

required when any IP address / Ethernet configurations have been changed, rebooting does not impact user data.

:

—

R) reset com ports Resets the hardwa re

used for Craft port

and SLIP port

connections. S) node controller

status P) set privileged

password

U) set unprivileged password

Y) element download Us ed for upgrading

X) exit menu Exits this menu. Returns to SCC 2120

Modem Configuration

Not applicable. Produces error message:

Sets password for

the privileged level

operator.

Sets password for

the unprivileged

level operator.

modules other than

the SCC 2120.

When M is selected on the SCC 2120

Modem Configuration Menu

the

No confirmation is required or given, the command prompt returns immediately.

Used if a port seems to be in a locked condition.

Current Privileged Pass word : <> Chan ge (Y /N) ?

Current Privileged Pass word : <> Chan ge (Y /N) ?Current Privileged Pass word : <> Chan ge (Y /N) ?

Privileged users may make configuration changes.

Current Unprivileged Pa s sw o rd : <> Chan ge (Y /N ) ?

Current Unprivileged Pa s sw o rd : <> Chan ge (Y /N ) ?Current Unprivileged Pa s sw o rd : <> Chan ge (Y /N ) ?

Unprivileged users have read-o nly access, they may not make configur at i o n ch an ges .

See the section “Element Download” in this chapter.

Not Implemented in this release

Not Implemented in this releaseNot Implemented in this release

Main Menu

.

Node Administration Menu

appears.

.

,

3

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Figure 3-2 Modem Configuration Menu

---- Modem Configuration ----

---- Modem Configuration ---- ---- Modem Configuration ----

Modem Status: NOT CONNECTED

Modem Status: NOT CONNECTED Modem Status: NOT CONNECTED

D) Answer : DISABLED

D) Answer : DISABLED D) Answer : DISABLED C) Answer Command : AT &C1&D2&Q0 S0=1

C) Answer Command : AT &C1&D2&Q0 S0=1

C) Answer Command : AT &C1&D2&Q0 S0=1 C) Answer Command : AT &C1&D2&Q0 S0=1 T) Answer Inactive Timeout : 0 seconds

T) Answer Inactive Timeout : 0 seconds

T) Answer Inactive Timeout : 0 seconds T) Answer Inactive Timeout : 0 seconds

B) Dial-Out : DISABLED

B) Dial-Out : DISABLED B) Dial-Out : DISABLED U) Dial-Out Command : AT &C1&D2&K3&Q0 X4 S0=0 DT

U) Dial-Out Command : AT &C1&D2&K3&Q0 X4 S0=0 DT

U) Dial-Out Command : AT &C1&D2&K3&Q0 X4 S0=0 DT U) Dial-Out Command : AT &C1&D2&K3&Q0 X4 S0=0 DT N) Dial-Out Number :

N) Dial-Out Number :

N) Dial-Out Number : N) Dial-Out Number : R) Dial-Out connect retries : 0

R) Dial-Out connect retries : 0

R) Dial-Out connect retries : 0 R) Dial-Out connect retries : 0 K) Dial-Out connect timeout : 60 seconds

K) Dial-Out connect timeout : 60 seconds

K) Dial-Out connect timeout : 60 seconds K) Dial-Out connect timeout : 60 seconds I) Dial-Out Inactive timeout : 0 seconds

I) Dial-Out Inactive timeout : 0 seconds

I) Dial-Out Inactive timeout : 0 seconds I) Dial-Out Inactive timeout : 0 seconds

S) Dial-Out W) Set default commands

S) Dial-Out W) Set default commands S) Dial-Out W) Set default commands A) Answer H) Hangup

A) Answer H) Hangup

A) Answer H) Hangup A) Answer H) Hangup X) exit

X) exit

X) exit X) exit

Configuration

[1,1] NEAR TAC 2110 >

[1,1] NEAR TAC 2110 >[1,1] NEAR TAC 2110 >

Modem

Configuration

Options

Modem Configuration Menu

The

is used to support an optional dial-up modem which may be connected to the port labelled Management Port In on the rear connector module. This port supports the Serial Line Interface Protocol, a subset of TCP/IP designed to support Internet protocols across a low-speed RS-232 Wide Area Network connection.

The Modem Status field on the

Modem Configuration Menu

reflects the status of the Data Carrier Detect lead (DCD) on th e Management Port In.

If SLIP is used, it may be used with or without a modem. To use SLIP without a modem, be certain that the Answer and Dial-Out fields are set to DISABLED.

The options on the

Modem Configuration Menu

are documented

in Table 3-4 below.

Verilink APS 2000 User Manual

3

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Configuration

Table 3-4 Modem Configuration Commands

Menu Option Description Instructions

D) Answer Toggles answer mode

C) Answer Command Command string to be

T) Answer Inactive Timeout

B) Dial-Out Toggles on/off dialing a

U) Dial-Out Command

N) Dial-Out Number Phone number to call. Enter a phone number if using dial-out. R) Dial-Out connect

retries K) Dial-Out connect

timeout

on/off.

sent to modem to setup auto-answer mode.

Length of time an incoming call is allowed to be idle before the modem is disconnected.

stored number to report alarms to a trap host.

Command sent to modem to initiate a call.

Number of times to retry dialing out to trap host.

Length of time to wait for a connection after initiating a di al-out call.

Select ENABLE to support answering incoming calls. Select DISABLE to inhibit answering calls.

The default auto-answer string is shown in Figure 3-2, use this string or modify it per the requirements of your modem.

Enter a value, in seconds, for idle time before disconnect (range = 1 to 255), if this value is reached, the DTR lead is toggled low to disconnect the modem (modem should be set for [&D2] disconnect on DTR low).

Select ENABLE to support dialing out to a trap host when alarm conditions occur or clear or DISABLE if the SCC 2120 is never to dial out to a trap host.

The default dia l- o ut s tring is shown in Figure 3-2, use this string or modify it per the requirements of your modem and phone line.

Enter a number in the range of 1-255, or zero to disable the retry function.

Enter a value, in seconds, to wait for a connection after dialing a call to a trap host, range = 10 to 255 seconds.

I) Dial-Out Inactive timeout

S) Dial-Out Command used for

W) Set default commands

A) Answer Sends answer string. Use this command to set modem to answer mode by

H) Hangup Disconnects modem. Causes modem to disconnect now by dropping DTR. X) exit Exits to menu above. Returns to

Configuration

Length of time a dial-out call is allowed to be idle before the modem is disconnected.

testing. Rests all modem menu

items to default values.

Enter a value, in seconds, for idle time before disconnect (range = 1 to 255), if this value is reached, the DTR lead is toggled low to disconnect the modem (modem should be set for [&D2] disconnect on DTR low).

The Dial-Out command causes the modem to dial now.

Use this command to set all options on this menu to their original, factory default values, disables modem.

sending the config ured answer command now .

Node Administration Menu

Follow these steps to configure your CSU modules.

.

procedure

1. Select the SCC 2120 in Shelf 1, Slot 1, by entering S and following the format shown at the prompt line.

2. Enter "N" to specify the near end element. The prompt lin e will display identify the module’s location.

[1,1] NEAR TAC 2110

. The numbers in the brackets

3

-8 Verilink APS 2000 User Manual

Configuration

This prompt line is standard whenever you are configuring an SCC or TAC.

3. Enter "O" to access the Node Administration screen.

Figure 3-3 Node Controller Menu

--- NODE CONTROLLER MENU ---

--- NODE CONTROLLER MENU --- --- NODE CONTROLLER MENU -- T) time

T) time

T) time T) time D) date

D) date

D) date D) date I) node id

I) node id

I) node id I) node id N) site name

N) site name

N) site name N) site name A) Slip Configuration

A) Slip Configuration

A) Slip Configuration A) Slip Configuration E) Ethernet Configuration

E) Ethernet Configuration

E) Ethernet Configuration E) Ethernet Configuration M) Modem Configuration

M) Modem Configuration

M) Modem Configuration M) Modem Configuration O) IP Gateway

O) IP Gateway

O) IP Gateway O) IP Gateway H) trap host ip address

H) trap host ip address

H) trap host ip address H) trap host ip address C) community string (read)

C) community string (read)

C) community string (read) C) community string (read) W) community string (write)

W) community string (write)

W) community string (write) W) community string (write) F) flash download

F) flash download

F) flash download F) flash download B) boot

B) boot

B) boot B) boot R) reset com ports

R) reset com ports

R) reset com ports R) reset com ports S) node controller status

S) node controller status

S) node controller status S) node controller status P) set privileged password

P) set privileged password

P) set privileged password P) set privileged password U) set unprivileged password

U) set unprivileged password

U) set unprivileged password U) set unprivileged password Y) element download

Y) element download

Y) element download Y) element download X) exit menu

X) exit menu

X) exit menu X) exit menu

SNMP Parameters

[1,1] NEAR TAC 2110 >

[1,1] NEAR TAC 2110 >[1,1] NEAR TAC 2110 >

Before proceeding, check with your System Administrator for the exact values you will need to use for all the following parameters. These parameters are specific to the local LAN segment, SLIP peer address (if SLIP is used), SCC module and SNMP management.

Trap Host IP address.

Address chosen by the user to receive AS2000 alarms. The SNMP network manager will receive all traps.

Community string.

An administratively assigned string

identifying the relationship between SNMP entities.

Community string (read).

The string used to perform SNMP gets. The default value in the SCC is "public". Change the SCC’s string to match the SNMP network manager’s read community string for this node.

Community string (write).

The string used to perform SNMP sets. The default value in the SCC is "netman". Change the SCC’s string to match the SN MP network m anager’s write commu nity string for this node.

Verilink APS 2000 User Manual

3

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Configuration

4. Configure the specific parameters for SLIP and/or Ethernet.

To configure for SLIP

a.

, enter "A" to access the following

configuration screen.

Figure 3-4

---- host configuration for slip ----

---- host configuration for slip ---- ---- host configuration for slip ----

L) Slip Local ip address : 192.94.45.96

L) Slip Local ip address : 192.94.45.96 L) Slip Local ip address : 192.94.45.96

P) Slip Peer ip address : 192.94.45.101

P) Slip Peer ip address : 192.94.45.101 P) Slip Peer ip address : 192.94.45.101

S) Slip Subnet Mask : 255.255.255.0

S) Slip Subnet Mask : 255.255.255.0 S) Slip Subnet Mask : 255.255.255.0

X) exit

X) exit X) exit

[1,1] NEAR TAC

[1,1] NEAR TAC [1,1] NEAR TAC

2110 >

2110 >2110 >

Sequentially enter and configure each parameter on the screen.

To configure for Ethern et

b.

configuration screen.

Figure 3-5 Ethernet Configuration

---- host configuration for Ethernet ----

---- host configuration for Ethernet ---- ---- host configuration for Ethernet ----

L) Ethernet Local ip address : 192.94.45.96

L) Ethernet Local ip address : 192.94.45.96 L) Ethernet Local ip address : 192.94.45.96 S) Ethernet Subnet Mask : 255.255.255.0

S) Ethernet Subnet Mask : 255.255.255.0

S) Ethernet Subnet Mask : 255.255.255.0 S) Ethernet Subnet Mask : 255.255.255.0 T) Ethernet Type : Ethernet/DIX

T) Ethernet Type : Ethernet/DIX

T) Ethernet Type : Ethernet/DIX T) Ethernet Type : Ethernet/DIX X) exit

X) exit

X) exit X) exit

[1,1] NEAR TAC 2110 >

[1,1] NEAR TAC 2110 > [1,1] NEAR TAC 2110 >

Sequentially enter and configure each parameter on the screen.

To configure traps,

c.

enter "

configuration screen.

, enter "E" to access the following

M"

to access the following

3

-10 Verilink APS 2000 User Manual

Figure 3-6 SNMP Trap Configuration

---- host configuration for traps ----

---- host configuration for traps ---- ---- host configuration for traps ----

N) Number of trap hosts : 1

N) Number of trap hosts : 1N) Number of trap hosts : 1

1) host 1 ip address : 192.94.45.77

1) host 1 ip address : 192.94.45.771) host 1 ip address : 192.94.45.77

1) host 2 ip address : 0.0.0.0

1) host 2 ip address : 0.0.0.01) host 2 ip address : 0.0.0.0

1) host 3 ip address : 0.0.0.0

1) host 3 ip address : 0.0.0.01) host 3 ip address : 0.0.0.0

1) host 4 ip address : 0.0.0.0

1) host 4 ip address : 0.0.0.01) host 4 ip address : 0.0.0.0 X) exit

X) exit

X) exitX) exit

Sequentially enter and configure each parameter on the screen. (The range for

Number of trap hosts

4.)

Configuration

is from 1 to

d. To return to the

Node Administration Menu

, type "X".

Verilink APS 2000 User Manual

3

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Configuration

Configuration Menu

Access the

Menu

Figure 3-7 APS Configuration Menu

APS CONFIGURATION -- FW Rev 4.0 HW Fab 0.8 Type TAC 2110 --

APS CONFIGURATION -- FW Rev 4.0 HW Fab 0.8 Type TAC 2110 -- APS CONFIGURATION -- FW Rev 4.0 HW Fab 0.8 Type TAC 2110 --

|-----------------------|

|-----------------------| |-----------------------|

-------<< eq <<-------| K) aps control AUTO |-------<< net <<-------

-------<< eq <<-------| K) aps control AUTO |-------<< net <<--------------<< eq <<-------| K) aps control AUTO |-------<< net <<------ W) framing SF | | W) framing ESF

W) framing SF | | W) framing ESF

F) format AMI | | F) format B8ZS

J) jitt buf 40 BITS | | J) jitt buf 40 BITS

R) eq crc REGEN | | R) net crc REGEN

Y) xcode yel OFF | | Y) xcode yel OFF

M) distance 0-133 | | L) lbO 0 DB

M) distance 0-133 | | L) lbO 0 DB M) distance 0-133 | | L) lbO 0 DB |-----------------------| Z) density 12%+80z

|-----------------------| Z) density 12%+80z

|-----------------------| Z) density 12%+80z |-----------------------| Z) density 12%+80z

X) exit menu C1-C5) canned config

X) exit menu C1-C5) canned config X) exit menu C1-C5) canned config

A) loop code/test ptns FULL T1 Code/PTN B) diu clock THRU

A) loop code/test ptns FULL T1 Code/PTN B) diu clock THRU A) loop code/test ptns FULL T1 Code/PTN B) diu clock THRU P) prm OFF

P) prm OFF

P) prm OFF P) prm OFF D) select D&I DS0s (1,-,24)

D) select D&I DS0s (1,-,24)

D) select D&I DS0s (1,-,24) D) select D&I DS0s (1,-,24) _ _ _ _ _ _ _ _ _ _ _ _

_ _ _ _ _ _ _ _ _ _ _ _

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

_ _ _ _ _ _ _ _ _ _ _ _

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ G) Alarm ENABLE

G) Alarm ENABLE

G) Alarm ENABLE G) Alarm ENABLE [1,1] NEAR TAC 2110 >

[1,1] NEAR TAC 2110 >

[1,1] NEAR TAC 2110 >[1,1] NEAR TAC 2110 >

Configuration Menu

.

by typing "C" at the APS 2000

Main

Configuration Menu Commands

Some of the commands on the CSU on both the left and right sides of the screen. Commands that are used for both DSX-1 equipment and T1 network ports are repeated on both the equipment and the net side of the diagram. Command prompts for these options present pairs of values: the value for the equipment side is followed by the value for the network side.

For example, if connecting a D4 (SF) channel bank to an ESF T1 circuit the SF,ESF framing selection would be used.

Table 3-5 below describes all of the SCC 2020 CSU

Menu

options:

3

-12 Verilink APS 2000 User Manual

Configuration Menu

Configuration

are shown

Table 3-5 CSU Configuration Options

Menu Option Description Instructions

Configuration

W) framing Selects T1 framing

mode for both DSX-1 equipment port and T1 network port.

Selection for the Equipment side must match the optioning of the equipment.

Selection for the T1 network side must match the type of T1 installed by the network service provider.

F) format Selects AMI or B8ZS

for the DSX-1 equipment and T1 network line codes, must match T1 and equipment settings.

In Mux mode, (where no DSX-1 equipment is used) only the second parameter is meaningful.

First value = DSX-1 equipment, second value = T1 circuit. 1(SF,SF) — D4 equipment and a D4 T1. 2(ESF,SF) — ESF equipment and a D4 T1. 3(SF,ESF) — D4 equipment and an ESF T1. 4(ESF,ESF) — ESF equipment and an ESF T1. 5(UF,UF) — unframed equ ipm en t on a n unf ra med T1 ( nev er

use this option on a T1 circuit provided by a telephone company).

6(SF,ZBT) — D4 equipment on a Z ero Bit Time Slot Insertion T1 (there are no ZBTSI T1 circuits, do not use this option).

7(ESF,ZBT) — ESF equipment on a ZBTSI T1 (there are no ZBTSI T1 circuits, do not use this option).

First value = DSX-1 equipment, second value = T1 circuit. 1(AMI,AMI) — AMI coded DSX-1 equipment on an AMI T1. 2(AMI,B8ZS) — AMI DSX-1 equipment on a B8ZS T1. 3(B8ZS,AMI) — B8ZS DSX-1 equipment on an AMI T1 (this

selection is problema tic unless the equipme nt is conf igured to use only 56K of each DS0 instead of 64K per DS0).

4(B8ZS,B8ZS) — B8ZS DSX-1 equipment on a B8ZS T1.

J) jitt buf Jitter Buffer selects

the size of the jitter buffer, in bits, on the DSX-1 and Network sides of the CSU.

Larger buff ers are more resistant to a jittery signal, smaller buffers introduce less delay.

R) eq crc Selects whether or

not the CSU will regenerate the CRC-6 error checking used in ESF framing on both, one, or no sides.

Y) xcode yel Selects whether

yellow alarms will be translated from the D4 bit 2 method to the ESF FDL method.

1(16,16) — Sets both buffers to 16 bit depth, less resilience to jitter and less delay.

2(40,16) — Sets DSX-1 side to 40 bits and network side to 16 bits.

3(16,40) — Sets the DSX-1 side to 16 bits and the network side to 40 bits.

4(40,40) — Sets the default value of 40-bit jitter buffer on both sides of the CSU.

1(PASS) — same type framing on both sides. 2(NET TO EQ) — ESF equipment on a non-ESF T1 . 3(EQ TO NET) — non-ESF equipment on an ESF T1. 4(BOTH) — use in Drop and Insert mode if equipment and

T1 are both ESF. 1(OFF) — use for same type framing on both sides or to

have the CSU dr op yellow ala rms with dissim ilar framing. 2(NET TO EQ) — ESF equipment and D4 T1. 3(EQ TO NET) — D4 equipment on an ESF T1. 4(BOTH) — not used.

Verilink APS 2000 User Manual

3

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Configuration

Menu Option Description Instructions

M) distance Cable length option,

used to increase DSX1 signal strength when DSX-1 cable is long.

L) lbO Line build out is used

to reduce the signal strength being sent to the T1 network.

New T1 circuits installed by a telephone company in the USA will have a smart jack, use 0db.

K) aps control Selects the mode for

the Automatic Protection Switch function.

T) alm thld Selects enabling or

disabling thresholds.

Z) density Selects density

enforcement technique.

Density should always be set to NONE on a B8ZS T1, B8ZS allows a full 64K per DS0.

Density should never be set to NONE on an AMI T1.

Choices are: (1)0-133 (2)133-266 (3)266-399 (4)399-533 (5)533-655, select the value that most nearly equals the length of the cable between the CSU and the local DSX-1 equipment.

(1) 0 db — use this value if a smart jack (network termination device) ha s been inst al led by the tele p hon e carrier, or if the first active device on the T1 is between 2,000 and 3,000 feet away.

(2) 7.5 db — use this value only if there is no smart jack and the first repeater is 1,000 to 2,000 feet away.

(3) 15 db — use this value only if there is no smart jack and the first repeater is zero to 1,000 feet away.

See the secti on ""APS Control Modes"" below.

(1)disable — Alarm threshold function is shut off. (2)default — Defaul t val ues for alarm thresholds are

enabled. (1)NONE — no density enf orcemen t, use this value only and

always on a B8ZS T1. (2)12 — The CSU begins stuffing ones into the user

datastream after 12 consecutive zeroes. (3)62411— The CSU enforces AT&T public ation 62411

density restrictions (average 12.5% minimum ones density). (4)80 0's — The CSU begins stuffing ones into the user

datastream after 80 consecutive zeroes (recommended). (5)15 0's — The CSU begins stuffing ones into the user

datastream after 15 consecutive zeroes.

C1-C5) canned config

3

-14 Verilink APS 2000 User Manual

Allows selection of any of five complete configurations which vary according to framing and line coding on Equipment and Network sides.

Canned configur ation #1, EQPT=SF/AMI NET=ESF/AMI. Canned configur ati o n #2 , EQ PT = ES F /AMI NET=ESF /AM I. Canned configur ati o n #3 , EQ PT = SF /AMI NET=ESF/B8ZS. Canned configur ati o n #4 , EQ PT = SF/ B 8 Z S NET=ESF/B8 Z S. Canned configuration #5, EQPT=ESF/B8ZS NET=ESF/B8ZS.

Menu Option Description Instructions

Configuration

B) diu clock Selects the source of

the transmit clock used by the CSU to transmit data toward the T1 network.

Note that in the APS 2000 product this option is ignored, the SCC 2120 performs as though THRU timing were selected.

P) prm Performance

Response Messages may optionally be sent in the 4K FDL portion of an ESF framed T1.

G) Alarm Determin es wheth er

or not alarm messages are presented.

X) exit menu Exit this menu. Returns to t he SCC 2120

(1)THRU — The CSU derives transmit clock from the transmit datastream of the DSX-1 equipment, automatically selected in the APS 2000 produ ct.

(2)INT — Does not apply to the APS 2000. (3)EXT 422 — Does not apply to the APS 2000. (4)EXT TTL — Does not apply to the APS 2000. (5)NET — Does not apply to the APS 2000. (6)EQ — Does not apply to the APS 2000. (7)TIU — Does not apply to the APS 2000. (8)DIU — Does not apply to the APS 2000. 1(NO) — Performance response messages received from the

network are ignored, no messa ges are sent. Re quired to use the FDL portion of ESF framing for Automatic Protection Switch funcions.

2(USER) — Does not apply to the APS 2000. 0(Disable) — Alarm reporting is turned off.

1(Enable) — Alar m reporting is enabled, messages will appear on the Craft terminal as alar m s occur and clear.

Main Menu

.

APS Control Modes

Normal/Reset

mode

5. Configure your CSUs according to the information above. Once you have finished configuring the CSUs, you must initialize the system.

APS 2000 operates in one of four different control modes to provide flexibility in both normal switching functions and maintenance activities. Switching and restoral may be fully automatic, semi-automatic, or manual, or they may be inhibited altogether. The four control modes are described in this section.

Normal/Reset mode is the semi-automatic control mode. A T1 line operating in this mode will switch service to the protection line automatically when appropriate, but will remain on the protection line, even after the failure clears, until the user asserts the “Reset” command. The purpose is to allow trapping of intermittent or brief T1 line failures, or to correlate a line failure with any other abnormal system activity.

Normal/Rese t m o de is s et b y de fa ult until anothe r co n tr o l mo d e is selected. Whenever the APS control status indication displays

NORMAL

, the line must be manually reset (select

RESET

from the command line) after a switch has occurred and after verifyi ng that the trouble has been cleared. Asserting

RESET

while the line is still

failed will have no effect.

Verilink APS 2000 User Manual

3

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Configuration

While a switch is in process (service transferred to the protection line), the original working line may be tested either locally or remotely to verify that the trouble still exists or to ascertain the nature of the trouble. Since traffic is operating on the protection line during these tests, no service degradation will occur during testing of the effected T1 line.

The Normal/Reset mode may be affected by failures of higher priority T1 lines. If the protection line is not available, either because it is also failed or because a higher priority T1 line has failed, any lower priority lines will not attempt to transfer and will reset automatically to the original circuit if al ready transferred.

The Normal/Reset control mode may be selected for both working and protection lines, bu t is more ap propriat e for worki ng line s. For example, if a lightning storm in the middle of night, caused the protection line to fail when no maintenance personnel were available to reset it, it would remain unavailable to other lines until reset in the morning.

Manual switch

mode

The Manual Switch control mode forces an otherwi se normal circuit to switch service to the protection line and remain switched as long as manual is asserted.

MANUAL

system but may be selected at both ends. The end (or ends) where

MANUAL

constraints of the priority system as discussed above) and sends the switch code BOP to the fa r end to force it to also switch to the spare. This manually forced switch will remain in effect, regardless of errors or lack of errors, until anot her contro l mode is a sserted or the protection line becomes unavailable due to a failed protection line or failure of a higher priority working line.

The accomplished on a working T1 line without disrupting service. It also may be used to eliminate “ping-ponging” of an intermittent line. If a line is experiencing intermittent error bursts, it may be desirable to leave it on the protection line full time. Conversely, if the error burst s ar e o f very short durati on , i t ma y be de s ir able to prevent the effected line from switching at all so that any lower priority lines with more severe problems may have access to the protection line without being intermittently “bumped.” Use the

INHIBIT

need only be selected at one end (either end) of the is selected is forced to switch to the spare (within the

MANUAL

mode may be used so that routine testing may be

function, desc ribed next, to preve n t a line from switching.

Inhibit

The

Inhibit mode

3

-16 Verilink APS 2000 User Manual

InhibitInhibit

spare or restores an already switched circuit back onto its working line. prevent the possibility of a “half switch.”

INH

may be used to prevent a “priority bump.” For example, if routine testing is to be performed on the priority #2 line, asserted on the priority #1 line will prevent it from bumping off the priority #2 line in the event of a failure on #1.

control mode prevents a line from switching to the

INH

must be asserted at both ends of the selected line to

INH

Automatic mode

Configuration

Automatic

The

AutomaticAutomatic

reset with no operator intervention required. selected at both ends of a system to ensure fully automatic reset after trouble is cleared. It is the preferred control mode for protection lines and may also be selected for working lines.

control mode enables fully automatic switching and

AUTOMATIC

must be

Switching Priority

Initializing the APS 2000

Switching priority is built into the APS system to eliminate the possibility of “cross-switches.” The effect of priority is to ensure that, during multiple line failures, the same line at each end switches to the spare. That line will be the highest priority failed line, as determined at time of installation. If a lower priority line has switched to the spare and subsequently, a higher priority line fails, the lower priority failed line will be “bumped” back onto its original line. This would also apply to a lower priority line which was forced to switch using the

To defeat the priority system, higher priority lines may be placed

INH

in desired, the entire system may be inhibited from switching simply by asserting protection line only. The protection line, having the highest priority by definition, cannot be switched to if it is in a “failed” state. Thus, a single command at one end can be used to prevent any system from switching, regardless of the conditions of the lines. This may be useful, for example, during a lightning storm which is causing intermittent failures on all lines.

To initialize the system use the Craft interface to:

so that they will not bump a lower priority line. Or, if

MAN

at one end (either end) or both ends of the

•

Bring up and reset the spare line.

MAN

mode.

Initializing the system

•

Bring up and reset the working lines.

•

Set the desired APS mode on each line.

You must initialize the lines one at a time, to put the system into service.

First, initialize the protection line. Then initialize the working lines, one at a time, beginning with the highest priority working line and ending with the lowest priority working line.

Follow this procedure to initialize and test each protection group:

1. Using external test equipment, BERT all of your T1 lines to be sure they are error free.

2. Make sure the power is on at both the near end and far end, and that all of the T1 lines and DSX-1 equipment are connected.

Verilink APS 2000 User Manual

3

-17

Configuration

3. At both ends, connect an APS2000 priorit y cable (P/N 458502572-001) from t he

APS IN

48C to RJ-48C cable. Pins 1,2,3,4,5 and 8 are used.

4. At both ends, seat the CSUs for the protection line (P1) in slot 1 and the highest priority line (L2) in slot 2. Unseat the remaining CSUs in the protection group (slots 3,4, and 5).

5. Using the Craft interface, select the protection line (P1) in slot 1, and go to the CSU configuration screen. The default value for the protection line, enter K at the prompt line. This will display the following line:

inh (4) auto

6. Enter 1 to reset the protection line. The P1 LED on the APS2000 shelves will go from red to green.

7. Fail the working line (L2) by disconnecting its Network port RJ48 cable. The system will switch the Customer Premise Equipment on the highest priority working line (L2) to the protection line (P1). The SCC LEDs will change as follows:

port on the card in slot 2. This is a straight through RJ-

K) apps control

.

APS OUT

will be

port on the card in slot 1 to the

NORM

aps control (1) reset (2) man (3)

. After specifying the slot of

Table 3-6 SCC LED patterns 1 of 3

Near and Far End CSUs

LEDs

APS2000 EQPT

STAT NET

8. Plug the RJ-48 connector back into the Network port on L2. After a few seconds, the LEDs will ch ange as follows:

Table 3-7 SCC LED patterns 2 of 3

Green Off

Green Flashing

Off Red Green Red

LEDs

APS2000

P1 L2

Green/Amber

Near and Far End CSUs

P1 L2

Green Off

3

-18 Verilink APS 2000 User Manual

Configuration

EQPT

Green Flashing

Green/Amber

STAT

Off Flashing

Green/Amber

NET

Green Green

9. Use the CSU Configuration Menu to selec t the nea r end CSU for L2 in slot 2. Enter K at the prompt and select 1 to reset the working line, L2. After a few seconds, the LEDs will change as follows:

Table 3-8 SCC LED patterns 3 of 3

Near and Far End CSUs

LEDs

APS2000 EQPT STAT NET

Green Off

Red Green Off Off Green Green

P1 L2

10. At both ends, seat the CSUs for L3 in slot 3, which is the second priority working line.

11. At both ends, connect an APS2000 priority cable (P/N 458502572-001) from the

APS IN

port on the card in slot 3.

APS OUT

port on the card i n slot 2 to the

12. Repeat steps 5 through 9 for the protection line P1, and the second working line, L3.

13. At both ends, seat the CSUs for L4 in slot 4, which is the third working line.

14. At both ends, connect an APS2000 priority cable (P/N 458502572-001) from t he

APS IN

port on the card in slot 4.

APS OUT

port on the card in slot 3 to the

15. Repeat steps 5 through 9 for the protection line P1, and the third working line, L4

16. Continue performin g steps 13, 14, and 15 with any remaining working lines in group 1. This completes initialization for the first group. If you want to, you can now go back into each CSU and select a different APS control mode (

auto

).

manual, inhibit

, or

17. Repeat all of these steps for the second and third protection groups, if used.

Verilink APS 2000 User Manual

3

-19

Configuration

Important Do’s and Don’ts

1. If you’re in Telnet, exit from the Craft screens until the pSH+> prompt is reached before dis con nec ting th e Telne t session.

2. There is only one possible Trap Host IP address. You mu st u se the Trap Host IP address as the SLIP Peer IP address.

Firmware Upgrade Procedures

Firmware upgrades performed using an SCC 2120 may be divided into two categories: upgrades of the SCC module’s own firmware, and upgrades in which th e SCC broadcasts new firmware to the TAC 2110 module(s) in the node .

Upgrading SCC Modules

To use these

procedures you

will need

The two procedures below are used to upgrade the firmware of an SCC 2120. In each case you must be running from the opposite flashbank. To upgrade flashbank A, you must be running from flashbank B. To upgrade flashbank B, you must be running from flashbank A.

•

A file containing a new revision o f SCC f i rmware.

•

An Ethernet or SLIP connection to the SCC 2120 (for performing FTP file transfers).

To use these

procedures you

will need to know

Before beginning

this upgrade

•

a Telnet applicati on o r a di rect t erm inal co nn ecti on t o t he SCC Craft interface.

•

An FTP

NOTE:

•

Basic TCP/IP terminology.

•

How to use FTP.

•

How to use the specific FTP server program you have selected.

•

The IP address of the FTP server.

•

The specific path and filename to the new SCC firmware file.

1. If need be, install the FTP server program which you have selected.

server

Most common FTP programs are CLIENTS, not SERVERS. Be sure you have an FTP server program. Such programs, often distribute d as sha r e w a r e, may be found on Worl d W id e Web download sites.

application.

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-20 Verilink APS 2000 User Manual

Configuration

2. If need be, copy the file containing the new SCC firmware to a known location (path) on the comp uter r unning t he FTP ser ver application.

3. Document the CSU configuration of the CSU portio n of the SCC card being upgraded.

Overview

Upgrading Flashbank B

You will need to

know

SCC firmware can be upgraded by using FTP to transfer the new executable files into the card. The procedure will vary according to what version is currently installed and what new code version is to be used.

In most cases it is advisable to download new versions of SCC code to flashbank B only, leaving the original code as shipped in flashbank A. In this way the user is always able to fall back to the known code revision if a problem is noted with the upgrade.

Use this procedure to upgrade flashbank B. The top line of the SCC 2120

firmware is currently running and the second line indicates which flashbank the current firmware was loaded from. To determine which version of firmware is in the other flashbank, use the boot option on the flashbank..

•

The IP address of the FTP server.

•

The absolute path to the directory containing the Verilink SCC upgrade files.

Node Administration Menu

Main Menu

indicates which version of

and select that

Step by Step

•

The password, if required, for accessing the FTP server.

NOTE:

1. Using either direct connection to the Craft port, or Telnet,

2. Use the “O” command to select the

3. Type

NOTE:

If you received the Verilink SCC files in a PKZIPped format, first extract them using PKUNZIP. Two files may be found, FLASH.A and FLASH.B. For this procedure only FLASH.B is required.

open a Craft session to the SCC card to be upgraded.

Node Administration

Menu

.

“

” to reboot.

B

The boot command reboots only the SNMP and Craft interface functions of the SCC 2120, any user data passing through the CSU port ion of the SC C 212 0 wil l no t be affe cte d.

Verilink APS 2000 User Manual

3

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Configuration

4. Select flashbank A.

pSH+>

5. When the

pSH+>

pSH+>pSH+>

prompt returns type “

FTP <IP address of FTP

server>”.

6. Login to the FTP server using the method required by your FTP server program.

7. Use the “

command to change to the direc to ry where you

CD”

previously placed the file FLASH.B.

8. Use “

DIR”

or “

, as appropriate, to produce a long display of

ls -l”

the files in this directory.

9. Record the file size of the FLASH.B file.

10. Issue the command “

NOTE:

If you fail to issue the command “

binary”.

binary”

, the file will be

corrupted when it is transferred.

11. Issue the command “

get flash.b flash.hex

”.

The file is now transferred from the F TP server to a RAM di sk in the SCC card. If you are using Ethernet, this process will take about a minute, more or less, depending on LAN segment traffic. If using FTP over SLIP instead of Ethernet, it may require 15 to 30 minutes to transfer the file.

12. End the FTP session by typing “

pSH+>

to the

pSH+>

pSH+>pSH+>

prompt in the SCC 2120.

and you will be returned

quit”

13. Confirm that the transfer was successful by issuing the command “

and comparing the size of FLASH.HEX to

ls -l”

FLASH.B as recorded in step 9. If the file sizes do not match, DO NOT PROCEED, instead type “

rm flash.hex

”

to remove the

incorrect size file and return to step 5.

14. If the file sizes match in step 13, type “ Craft interface.

15. Select the

Node Administration Menu

16. Select flash download by typing “

17. Select flashbank B.

18. Once the flash download is complete, use the “B” command to boot. Boot from flashbank B. Login to the craft interface of the SCC and verify that the versio n of firmware being executed, as shown on the top line of the version you just installed.

3

-22 Verilink APS 2000 User Manual

by typing “

F”.

and login to the

craft”

Main Menu

O”.

, is the

Configuration

If you received new firmware for both flashbank A and flashbank B, it is not necessary to upgrade both flashbanks to the same revision. It may be more desirable to lea ve the original version of firmwar e in flashbank A pe rmanent ly, or wh ile the new fi rmware i n b ank B i s tested.

Element Download

The SCC 2120 module can be used to broadcast new versions of firmware to the TAC 2110 modules i n the no de. The procedure for element downloads is as follows:

1. Place the download file received from Verilink in a known path on an FTP server.

2. Connect to the SCC 2120 directly or using Telnet.

pSH+>

3. At the FTP server, “

pSH+>

pSH+>pSH+>

prompt, issue the command to connect to the

”

FTP 192.94.45.229

(use the IP address of your

FTP server).

4. Navigate to the directory where the Verilink upgrade file is located by using the “

5. Set the transfer type to binary by typing “

6. Transfer the file to the SCC 2120 by typing “

command.

cd”

binary”.

get myfile.ext”

(use

the actual name of the file received from Verilink).

7. Now end the FTP session by typing “

pSH+>

8. At the

9. Type “O” for the

pSH+>

pSH+>pSH+>

prompt, type “

craft”

Node Administration Menu

quit”.

to enter the Craft interface.

.

10. Type “Y” for the

Element Download Menu

The

Element Download Menu

is shown in Figure 3-8. The

.

commands presented are documented in Table 3-9

Figure 3-8 Element Download Menu

---- element download ----

---- element download ---- ---- element download ----

T) element : ----

T) element : ---- T) element : ----

F) file :

F) file : F) file :

S) shelf : 0 - 0

S) shelf : 0 - 0 S) shelf : 0 - 0

L) slot : 0 - 0

L) slot : 0 - 0 L) slot : 0 - 0

D) dwnload

D) dwnload D) dwnload

X) exit menu

X) exit menu X) exit menu

[1,1] NEAR TAC 2110 >

[1,1] NEAR TAC 2110 >[1,1] NEAR TAC 2110 >

Verilink APS 2000 User Manual

3

-23

Configuration

The commands used on the

Element Download Menu

according to:

•

The type of application mod ul e (s) you are upgrading.

•

The name of the file provided for the upgrade.

•

The shelf and slot location of the module(s).

The commands are used as follows:

Table 3-9 Element Download Commands

Menu Option Description Instructions

T) element Selects type of module to be

upgraded, a list is presented.

To upgrade the CSU portion of an SCC 2120, select TAC

2110. Selections 9 and 10 will not

function unless the sites are connected with an ESF T1 which has a continuous Facilities Data Link (FDL) link between them.

To test for a continuous FDL, attempt to reach the Far Element from the Main Menu.

(1)TAC 2010 — a TAC 2010 CSU or an SCC 2120. (2)TAC 2130 — An IDCSU (Integrated DSU/CSU). (3)TAC 2110 — an Automatic Prote ction Switch (APS)

CSU. (4)DIU 2130 — A two-port DSU module. (5)DIU/NMS — A modified DIU 21 30 which supports

mapping done by the carrier to DDS remote circuits. (6)DIU/DBU — Modified DIU 2130 which supports

external dial-backup function. (7)DDS 2140 — a DIU 2140 subrate data multiplexer 5

port RS-232 DSU. (9)FAR TAC 2130 — an IDCSU at a remote site. (10)FAR TAC 2110 — an APS CSU at a remote site.

will vary

(11)DIU/HLM — a DIU 2131, V.35+RS-232 two-port DSU. F) file Name of the upgrade file. Use the name as it was supplied by Verilink. S) shelf Shelf or range of shelves Enter a single number or a range as in: 1-4. L) slot Slot or range of slots. Enter a single number or a range as in: 1-13. D) dwnload Starts the download. Set all other parameters first, then issue the D command. X) exit menu Exits to menu above. Returns to

Node Administration Menu

.

3

-24 Verilink APS 2000 User Manual

Chapter

4

Performance Menu

Performance Monitoring

You can monitor performan ce b y rev i ewing the T1 performance data registers and CSU alarms.

The CSU circuits of the SCC and TAC monitor the incoming signals from the equipment and network for various types of error events. They use these events to derive additional performance data in accordance with AT&T TR-54016, ANSI T1M1.3, and Verilink performance monitoring standards.

Most of the information accessible under the

Monitoring Menu

checking, used to detect errored seconds, is only present on an ESF T1.

Performance Monitoring Menu

The at the SCC 2120 or TAC 2110

is only available with an ESF T1. CRC-6 error

is accessed by typi ng P while

Main Menu

Performance

.

Performance Menu Display

Performance Monitoring Menu

The information and a Reset Registers command to clear all stored information.

Figure 4-1 Performance Monitoring Menu

--- PERFORMANCE MONITORING ---

--- PERFORMANCE MONITORING --- --- PERFORMANCE MONITORING ---

N) 1 hour network

N) 1 hour network N) 1 hour network

E) 24 hour es

E) 24 hour es E) 24 hour es

B) 24 hour bes

B) 24 hour bes B) 24 hour bes

S) 24 hour ses

S) 24 hour ses S) 24 hour ses

U) 24 hour uas

U) 24 hour uas U) 24 hour uas

L) 24 hour lofc

L) 24 hour lofc L) 24 hour lofc

R) reset registers

R) reset registers R) reset registers

X) exit menu

X) exit menu X) exit menu

[1,1] NEAR TAC 2110 >

[1,1] NEAR TAC 2110 >[1,1] NEAR TAC 2110 >

offers six options to display

Verilink APS 2000 User Manual

4

-1

Performance Monitoring

Definitions

The acronyms shown on the

Performance Monitoring Menu

described in Table 4-1 below

Table 4-1 Performance Monitoring Menu Acronyms

Acronym Meaning

ES Errored Second — any second during which one or more bit

BES Bursty Errored Seconds — a second having between 2 and

SES Severely Errored Second — a second with 320 or more CRC-6

UAS Unavailable Second — any second during which an

LOFC Loss Of Frame Count — an accumulated value equal to the

errors have been detected

319 CRC-6 error events Bursty errored seconds are not counted when an SES or UAS is

counted

error events, or one or more OOF (Out Of Frame) events

Unavailable Signal State occurs An Unavailable Signal State condition is declared after ten

consecutive S ES a nd clea rs on ly af ter t en c ons ecuti ve seco nd s which are not Severely Errored Seconds

number of times that a Loss Of Frame has been declared Loss of frame is declared when either LOS (Loss Of Signal) or

OOF (Out Of Frame) is true for two to three seconds LOF is cleared only after 10 seconds with LOS and OOF cl ea r

are

One Hour Network

The One Hour Network function produces screen output which lists a 24-hour summary for each of the parameters described in Table

4-1 above. Also shown are counts for each of the same al arm

conditions for the preceeding hour, in four 15-minute intervals. The One Hour Network display looks like:

Figure 4-2 One Hour Network Report

ONE HOUR PERFORMANCE DATA

ONE HOUR PERFORMANCE DATAONE HOUR PERFORMANCE DATA

1-27-99 14:10:44

1-27-99 14:10:441-27-99 14:10:44 Site Name: Tech Pubs SCC 2120

Site Name: Tech Pubs SCC 2120

Site Name: Tech Pubs SCC 2120Site Name: Tech Pubs SCC 2120 ELEMENT ID 1, 1

ELEMENT ID 1, 1

ELEMENT ID 1, 1 ELEMENT ID 1, 1 Valid Intervals 96 Seconds in Current Interval 464

Valid Intervals 96 Seconds in Current Interval 464

Valid Intervals 96 Seconds in Current Interval 464Valid Intervals 96 Seconds in Current Interval 464

ES UAS BES SES LOFC

ES UAS BES SES LOFCES UAS BES SES LOFC 0 0 0 0 0 24 Hour Total

0 0 0 0 0 24 Hour Total

0 0 0 0 0 24 Hour Total0 0 0 0 0 24 Hour Total 0 0 0 0 0 Current Interval

0 0 0 0 0 Current Interval

0 0 0 0 0 Current Interval0 0 0 0 0 Current Interval 0 0 0 0 0 Interval 1

0 0 0 0 0 Interval 1

0 0 0 0 0 Interval 10 0 0 0 0 Interval 1 0 0 0 0 0 Interval 2

0 0 0 0 0 Interval 2

0 0 0 0 0 Interval 20 0 0 0 0 Interval 2 0 0 0 0 0 Interval 3

0 0 0 0 0 Interval 3

0 0 0 0 0 Interval 30 0 0 0 0 Interval 3 0 0 0 0 0 Interval 4

0 0 0 0 0 Interval 4

0 0 0 0 0 Interval 40 0 0 0 0 Interval 4

[1,1] NEAR TAC 2110 >

[1,1] NEAR TAC 2110 >[1,1] NEAR TAC 2110 >

4

-2 Verilink APS 2000 User Manual

Performance Monitoring

24-hour Errored Seconds

The 24-hour Errored Seconds selection on the

Monitoring Menu

produces a screen showing the errored second

counts for each o f the l ast 96 fifteen minu te i nt e rvals. Errored seconds are the least serious of t he error conditions tra cked by th e CSU. A typical errored seconds display is shown below in Figure

4-3:

Figure 4-3 24-Hour Errored Seconds

24 HOUR ES PERFORMANCE DATA 1-27-99 14:25:26

24 HOUR ES PERFORMANCE DATA 1-27-99 14:25:2624 HOUR ES PERFORMANCE DATA 1-27-99 14:25:26 Site Name: Tech Pubs SCC 2120

Site Name: Tech Pubs SCC 2120

Site Name: Tech Pubs SCC 2120Site Name: Tech Pubs SCC 2120 1, 1

1, 1

1, 1 1, 1 Valid Intervals 96 Seconds in Current Interval 627

Valid Intervals 96 Seconds in Current Interval 627

Valid Intervals 96 Seconds in Current Interval 627Valid Intervals 96 Seconds in Current Interval 627 ES in 24 Hours 23 ES in Current Interval 0

ES in 24 Hours 23 ES in Current Interval 0

ES in 24 Hours 23 ES in Current Interval 0ES in 24 Hours 23 ES in Current Interval 0

1: 0 17: 0 33: 0 49: 0 65: 0 81: 0

1: 0 17: 0 33: 0 49: 0 65: 0 81: 0 1: 0 17: 0 33: 0 49: 0 65: 0 81: 0 2: 0 18: 0 34: 0 50: 0 66: 0 82: 0

2: 0 18: 0 34: 0 50: 0 66: 0 82: 0

2: 0 18: 0 34: 0 50: 0 66: 0 82: 0 2: 0 18: 0 34: 0 50: 0 66: 0 82: 0 3: 0 19: 3 35: 0 51: 0 67: 0 83: 0

3: 0 19: 3 35: 0 51: 0 67: 0 83: 0

3: 0 19: 3 35: 0 51: 0 67: 0 83: 0 3: 0 19: 3 35: 0 51: 0 67: 0 83: 0 4: 0 20: 0 36: 0 52: 0 68: 0 84: 0

4: 0 20: 0 36: 0 52: 0 68: 0 84: 0

4: 0 20: 0 36: 0 52: 0 68: 0 84: 0 4: 0 20: 0 36: 0 52: 0 68: 0 84: 0 5: 0 21: 0 37: 0 53: 0 69: 0 85: 0

5: 0 21: 0 37: 0 53: 0 69: 0 85: 0

5: 0 21: 0 37: 0 53: 0 69: 0 85: 0 5: 0 21: 0 37: 0 53: 0 69: 0 85: 0 6: 0 22: 0 38: 0 54: 0 70: 0 86: 0

6: 0 22: 0 38: 0 54: 0 70: 0 86: 0

6: 0 22: 0 38: 0 54: 0 70: 0 86: 0 6: 0 22: 0 38: 0 54: 0 70: 0 86: 0 7: 0 23: 0 39: 0 55: 0 71: 0 87: 0

7: 0 23: 0 39: 0 55: 0 71: 0 87: 0

7: 0 23: 0 39: 0 55: 0 71: 0 87: 0 7: 0 23: 0 39: 0 55: 0 71: 0 87: 0 8: 0 24: 0 40: 0 56: 0 72: 0 88: 0

8: 0 24: 0 40: 0 56: 0 72: 0 88: 0

8: 0 24: 0 40: 0 56: 0 72: 0 88: 0 8: 0 24: 0 40: 0 56: 0 72: 0 88: 0 9: 0 25: 0 41: 0 57: 0 73: 0 89: 0

9: 0 25: 0 41: 0 57: 0 73: 0 89: 0

9: 0 25: 0 41: 0 57: 0 73: 0 89: 0 9: 0 25: 0 41: 0 57: 0 73: 0 89: 0 10: 0 26: 0 42: 0 58: 0 74: 0 90: 0

10: 0 26: 0 42: 0 58: 0 74: 0 90: 0

10: 0 26: 0 42: 0 58: 0 74: 0 90: 010: 0 26: 0 42: 0 58: 0 74: 0 90: 0 11: 0 27: 0 43: 0 59: 0 75: 0 91: 0

11: 0 27: 0 43: 0 59: 0 75: 0 91: 0

11: 0 27: 0 43: 0 59: 0 75: 0 91: 011: 0 27: 0 43: 0 59: 0 75: 0 91: 0 12: 0 28: 0 44: 5 60: 0 76: 0 92: 0

12: 0 28: 0 44: 5 60: 0 76: 0 92: 0

12: 0 28: 0 44: 5 60: 0 76: 0 92: 012: 0 28: 0 44: 5 60: 0 76: 0 92: 0 13: 0 29: 0 45: 0 61: 0 77: 0 93: 0

13: 0 29: 0 45: 0 61: 0 77: 0 93: 0

13: 0 29: 0 45: 0 61: 0 77: 0 93: 013: 0 29: 0 45: 0 61: 0 77: 0 93: 0 14: 0 30: 0 46: 0 62: 0 78: 15 94: 0

14: 0 30: 0 46: 0 62: 0 78: 15 94: 0

14: 0 30: 0 46: 0 62: 0 78: 15 94: 014: 0 30: 0 46: 0 62: 0 78: 15 94: 0 15: 0 31: 0 47: 0 63: 0 79: 0 95: 0

15: 0 31: 0 47: 0 63: 0 79: 0 95: 0

15: 0 31: 0 47: 0 63: 0 79: 0 95: 015: 0 31: 0 47: 0 63: 0 79: 0 95: 0 16: 0 32: 0 48: 0 64: 0 80: 0 96: 0

16: 0 32: 0 48: 0 64: 0 80: 0 96: 0

16: 0 32: 0 48: 0 64: 0 80: 0 96: 016: 0 32: 0 48: 0 64: 0 80: 0 96: 0

Performance

[1,1] NEAR TAC 2110 >

[1,1] NEAR TAC 2110 >[1,1] NEAR TAC 2110 >

Verilink APS 2000 User Manual

4

-3

Performance Monitoring

24-Hour Bursty Errored Seconds

Bursty Errored Seconds are more sev e re than errored seconds and may cause some applications to lose sessions or suffer excessive retransmissions.

A typical 24-Hour Bursty Errored Seconds display is shown below in

Figure 4-4:

Figure 4-4 24-Hour Bursty Errored Seconds

24 HOUR BES PERFORMANCE DATA 1-27-99 14:43:46

24 HOUR BES PERFORMANCE DATA 1-27-99 14:43:4624 HOUR BES PERFORMANCE DATA 1-27-99 14:43:46 Site Name: Tech Pubs SCC 2120

Site Name: Tech Pubs SCC 2120

Site Name: Tech Pubs SCC 2120Site Name: Tech Pubs SCC 2120 1, 1

1, 1

1, 1 1, 1 Valid Intervals 96 Seconds in Current Interval 829

Valid Intervals 96 Seconds in Current Interval 829

Valid Intervals 96 Seconds in Current Interval 829Valid Intervals 96 Seconds in Current Interval 829 BES in 24 Hours 0 BES in Current Interval 0

BES in 24 Hours 0 BES in Current Interval 0

BES in 24 Hours 0 BES in Current Interval 0BES in 24 Hours 0 BES in Current Interval 0

1: 0 17: 0 33: 0 49: 0 65: 0 81: 0

1: 0 17: 0 33: 0 49: 0 65: 0 81: 0 1: 0 17: 0 33: 0 49: 0 65: 0 81: 0 2: 0 18: 0 34: 0 50: 0 66: 0 82: 0

2: 0 18: 0 34: 0 50: 0 66: 0 82: 0

2: 0 18: 0 34: 0 50: 0 66: 0 82: 0 2: 0 18: 0 34: 0 50: 0 66: 0 82: 0 3: 0 19: 0 35: 0 51: 0 67: 0 83: 0

3: 0 19: 0 35: 0 51: 0 67: 0 83: 0

3: 0 19: 0 35: 0 51: 0 67: 0 83: 0 3: 0 19: 0 35: 0 51: 0 67: 0 83: 0 4: 0 20: 0 36: 0 52: 0 68: 0 84: 0

4: 0 20: 0 36: 0 52: 0 68: 0 84: 0

4: 0 20: 0 36: 0 52: 0 68: 0 84: 0 4: 0 20: 0 36: 0 52: 0 68: 0 84: 0 5: 0 21: 0 37: 0 53: 0 69: 0 85: 0

5: 0 21: 0 37: 0 53: 0 69: 0 85: 0

5: 0 21: 0 37: 0 53: 0 69: 0 85: 0 5: 0 21: 0 37: 0 53: 0 69: 0 85: 0 6: 0 22: 0 38: 0 54: 0 70: 0 86: 0

6: 0 22: 0 38: 0 54: 0 70: 0 86: 0

6: 0 22: 0 38: 0 54: 0 70: 0 86: 0 6: 0 22: 0 38: 0 54: 0 70: 0 86: 0 7: 0 23: 0 39: 0 55: 0 71: 0 87: 0

7: 0 23: 0 39: 0 55: 0 71: 0 87: 0

7: 0 23: 0 39: 0 55: 0 71: 0 87: 0 7: 0 23: 0 39: 0 55: 0 71: 0 87: 0 8: 0 24: 0 40: 0 56: 0 72: 0 88: 0

8: 0 24: 0 40: 0 56: 0 72: 0 88: 0

8: 0 24: 0 40: 0 56: 0 72: 0 88: 0 8: 0 24: 0 40: 0 56: 0 72: 0 88: 0 9: 0 25: 0 41: 0 57: 0 73: 0 89: 0

9: 0 25: 0 41: 0 57: 0 73: 0 89: 0

9: 0 25: 0 41: 0 57: 0 73: 0 89: 0 9: 0 25: 0 41: 0 57: 0 73: 0 89: 0 10: 0 26: 0 42: 0 58: 0 74: 0 90: 0

10: 0 26: 0 42: 0 58: 0 74: 0 90: 0

10: 0 26: 0 42: 0 58: 0 74: 0 90: 010: 0 26: 0 42: 0 58: 0 74: 0 90: 0 11: 0 27: 0 43: 0 59: 0 75: 0 91: 0

11: 0 27: 0 43: 0 59: 0 75: 0 91: 0

11: 0 27: 0 43: 0 59: 0 75: 0 91: 011: 0 27: 0 43: 0 59: 0 75: 0 91: 0 12: 0 28: 0 44: 0 60: 0 76: 0 92: 0

12: 0 28: 0 44: 0 60: 0 76: 0 92: 0

12: 0 28: 0 44: 0 60: 0 76: 0 92: 012: 0 28: 0 44: 0 60: 0 76: 0 92: 0 13: 0 29: 0 45: 0 61: 0 77: 0 93: 0

13: 0 29: 0 45: 0 61: 0 77: 0 93: 0

13: 0 29: 0 45: 0 61: 0 77: 0 93: 013: 0 29: 0 45: 0 61: 0 77: 0 93: 0 14: 0 30: 0 46: 0 62: 0 78: 0 94: 0

14: 0 30: 0 46: 0 62: 0 78: 0 94: 0

14: 0 30: 0 46: 0 62: 0 78: 0 94: 014: 0 30: 0 46: 0 62: 0 78: 0 94: 0 15: 0 31: 0 47: 0 63: 0 79: 0 95: 0

15: 0 31: 0 47: 0 63: 0 79: 0 95: 0

15: 0 31: 0 47: 0 63: 0 79: 0 95: 015: 0 31: 0 47: 0 63: 0 79: 0 95: 0 16: 0 32: 0 48: 0 64: 0 80: 0 96: 0

16: 0 32: 0 48: 0 64: 0 80: 0 96: 0

16: 0 32: 0 48: 0 64: 0 80: 0 96: 016: 0 32: 0 48: 0 64: 0 80: 0 96: 0

[1,1] NEAR TAC 2110 >

[1,1] NEAR TAC 2110 >[1,1] NEAR TAC 2110 >

4

-4 Verilink APS 2000 User Manual

Performance Monitoring

24-Hour Severely Errored Seconds

Severely Errored Seconds pose a serious threat to the integrity of your data. Since a T1 offers a maximum of 1.536 Mbit/s, an error rate over 320 per second becomes significant. Severely errored seconds may also result from Out Of Frame (OOF) conditions. During an OOF event all user data is lost.

A typical 24-Hour Severely Errored Seconds Report is shown below in Figure 4-5:

Figure 4-5 24-Hour Severely Errored Seconds

24 HOUR SES PERFORMANCE DATA 1-27-99 14:48:46

24 HOUR SES PERFORMANCE DATA 1-27-99 14:48:4624 HOUR SES PERFORMANCE DATA 1-27-99 14:48:46 Site Name: Tech Pubs SCC 2120

Site Name: Tech Pubs SCC 2120

Site Name: Tech Pubs SCC 2120Site Name: Tech Pubs SCC 2120 1, 1

1, 1

1, 1 1, 1 Valid Intervals 96 Seconds in Current Interval 231

Valid Intervals 96 Seconds in Current Interval 231

Valid Intervals 96 Seconds in Current Interval 231Valid Intervals 96 Seconds in Current Interval 231 SES in 24 Hours 0 SES in Current Interval 0

SES in 24 Hours 0 SES in Current Interval 0

SES in 24 Hours 0 SES in Current Interval 0SES in 24 Hours 0 SES in Current Interval 0

1: 0 17: 0 33: 0 49: 0 65: 0 81: 0

1: 0 17: 0 33: 0 49: 0 65: 0 81: 0 1: 0 17: 0 33: 0 49: 0 65: 0 81: 0 2: 0 18: 0 34: 0 50: 0 66: 0 82: 0

2: 0 18: 0 34: 0 50: 0 66: 0 82: 0

2: 0 18: 0 34: 0 50: 0 66: 0 82: 0 2: 0 18: 0 34: 0 50: 0 66: 0 82: 0 3: 0 19: 0 35: 0 51: 0 67: 0 83: 0

3: 0 19: 0 35: 0 51: 0 67: 0 83: 0

3: 0 19: 0 35: 0 51: 0 67: 0 83: 0 3: 0 19: 0 35: 0 51: 0 67: 0 83: 0 4: 0 20: 0 36: 0 52: 0 68: 0 84: 0

4: 0 20: 0 36: 0 52: 0 68: 0 84: 0

4: 0 20: 0 36: 0 52: 0 68: 0 84: 0 4: 0 20: 0 36: 0 52: 0 68: 0 84: 0 5: 0 21: 0 37: 0 53: 0 69: 0 85: 0

5: 0 21: 0 37: 0 53: 0 69: 0 85: 0

5: 0 21: 0 37: 0 53: 0 69: 0 85: 0 5: 0 21: 0 37: 0 53: 0 69: 0 85: 0 6: 0 22: 0 38: 0 54: 0 70: 0 86: 0

6: 0 22: 0 38: 0 54: 0 70: 0 86: 0

6: 0 22: 0 38: 0 54: 0 70: 0 86: 0 6: 0 22: 0 38: 0 54: 0 70: 0 86: 0 7: 0 23: 0 39: 0 55: 0 71: 0 87: 0

7: 0 23: 0 39: 0 55: 0 71: 0 87: 0

7: 0 23: 0 39: 0 55: 0 71: 0 87: 0 7: 0 23: 0 39: 0 55: 0 71: 0 87: 0 8: 0 24: 0 40: 0 56: 0 72: 0 88: 0

8: 0 24: 0 40: 0 56: 0 72: 0 88: 0

8: 0 24: 0 40: 0 56: 0 72: 0 88: 0 8: 0 24: 0 40: 0 56: 0 72: 0 88: 0 9: 0 25: 0 41: 0 57: 0 73: 0 89: 0

9: 0 25: 0 41: 0 57: 0 73: 0 89: 0

9: 0 25: 0 41: 0 57: 0 73: 0 89: 0 9: 0 25: 0 41: 0 57: 0 73: 0 89: 0 10: 0 26: 0 42: 0 58: 0 74: 0 90: 0

10: 0 26: 0 42: 0 58: 0 74: 0 90: 0

10: 0 26: 0 42: 0 58: 0 74: 0 90: 010: 0 26: 0 42: 0 58: 0 74: 0 90: 0 11: 0 27: 0 43: 0 59: 0 75: 0 91: 0

11: 0 27: 0 43: 0 59: 0 75: 0 91: 0

11: 0 27: 0 43: 0 59: 0 75: 0 91: 011: 0 27: 0 43: 0 59: 0 75: 0 91: 0 12: 0 28: 0 44: 0 60: 0 76: 0 92: 0

12: 0 28: 0 44: 0 60: 0 76: 0 92: 0

12: 0 28: 0 44: 0 60: 0 76: 0 92: 012: 0 28: 0 44: 0 60: 0 76: 0 92: 0 13: 0 29: 0 45: 0 61: 0 77: 0 93: 0

13: 0 29: 0 45: 0 61: 0 77: 0 93: 0

13: 0 29: 0 45: 0 61: 0 77: 0 93: 013: 0 29: 0 45: 0 61: 0 77: 0 93: 0 14: 0 30: 0 46: 0 62: 0 78: 0 94: 0

14: 0 30: 0 46: 0 62: 0 78: 0 94: 0

14: 0 30: 0 46: 0 62: 0 78: 0 94: 014: 0 30: 0 46: 0 62: 0 78: 0 94: 0 15: 0 31: 0 47: 0 63: 0 79: 0 95: 0

15: 0 31: 0 47: 0 63: 0 79: 0 95: 0

15: 0 31: 0 47: 0 63: 0 79: 0 95: 015: 0 31: 0 47: 0 63: 0 79: 0 95: 0 16: 0 32: 0 48: 0 64: 0 80: 0 96: 0

16: 0 32: 0 48: 0 64: 0 80: 0 96: 0

16: 0 32: 0 48: 0 64: 0 80: 0 96: 016: 0 32: 0 48: 0 64: 0 80: 0 96: 0

[1,1] NEAR TAC 2110 >

[1,1] NEAR TAC 2110 >[1,1] NEAR TAC 2110 >

Verilink APS 2000 User Manual

4

-5

Performance Monitoring

24-Hour Unavailable Seconds

After ten Severely Errored S e conds in a row, the CSU begins to count Unavailable Seconds. As the name suggests, the error rate in this condition is considered to be so high that the T1 circuit should be treated as though it were not available.

Once a CSU begins count ing U navai lab le Sec ond s it will con tinue to do so until ten consecutive seconds pass, all of which are error free or have a lower error rate than a Severely Errored Second.

A typical 24-Hour Unavailable Seconds display is shown below in

Figure 4-6:

Figure 4-6 24-Hour Unavailable Seconds

24 HOUR UAS PERFORMANCE DATA 1-27-99 15:13:03

24 HOUR UAS PERFORMANCE DATA 1-27-99 15:13:0324 HOUR UAS PERFORMANCE DATA 1-27-99 15:13:03 Site Name: Tech Pubs SCC 2120

Site Name: Tech Pubs SCC 2120

Site Name: Tech Pubs SCC 2120Site Name: Tech Pubs SCC 2120 1, 1

1, 1

1, 1 1, 1 Valid Intervals 96 Seconds in Current Interval 786

Valid Intervals 96 Seconds in Current Interval 786

Valid Intervals 96 Seconds in Current Interval 786Valid Intervals 96 Seconds in Current Interval 786 UAS in 24 Hours 0 UAS in Current Interval 0

UAS in 24 Hours 0 UAS in Current Interval 0

UAS in 24 Hours 0 UAS in Current Interval 0UAS in 24 Hours 0 UAS in Current Interval 0

1: 0 17: 0 33: 0 49: 0 65: 0 81: 0

1: 0 17: 0 33: 0 49: 0 65: 0 81: 0 1: 0 17: 0 33: 0 49: 0 65: 0 81: 0 2: 0 18: 0 34: 0 50: 0 66: 0 82: 0

2: 0 18: 0 34: 0 50: 0 66: 0 82: 0

2: 0 18: 0 34: 0 50: 0 66: 0 82: 0 2: 0 18: 0 34: 0 50: 0 66: 0 82: 0 3: 0 19: 0 35: 0 51: 0 67: 0 83: 0

3: 0 19: 0 35: 0 51: 0 67: 0 83: 0

3: 0 19: 0 35: 0 51: 0 67: 0 83: 0 3: 0 19: 0 35: 0 51: 0 67: 0 83: 0 4: 0 20: 0 36: 0 52: 0 68: 0 84: 0

4: 0 20: 0 36: 0 52: 0 68: 0 84: 0

4: 0 20: 0 36: 0 52: 0 68: 0 84: 0 4: 0 20: 0 36: 0 52: 0 68: 0 84: 0 5: 0 21: 0 37: 0 53: 0 69: 0 85: 0

5: 0 21: 0 37: 0 53: 0 69: 0 85: 0

5: 0 21: 0 37: 0 53: 0 69: 0 85: 0 5: 0 21: 0 37: 0 53: 0 69: 0 85: 0 6: 0 22: 0 38: 0 54: 0 70: 0 86: 0

6: 0 22: 0 38: 0 54: 0 70: 0 86: 0

6: 0 22: 0 38: 0 54: 0 70: 0 86: 0 6: 0 22: 0 38: 0 54: 0 70: 0 86: 0 7: 0 23: 0 39: 0 55: 0 71: 0 87: 0

7: 0 23: 0 39: 0 55: 0 71: 0 87: 0

7: 0 23: 0 39: 0 55: 0 71: 0 87: 0 7: 0 23: 0 39: 0 55: 0 71: 0 87: 0 8: 0 24: 0 40: 0 56: 0 72: 0 88: 0

8: 0 24: 0 40: 0 56: 0 72: 0 88: 0

8: 0 24: 0 40: 0 56: 0 72: 0 88: 0 8: 0 24: 0 40: 0 56: 0 72: 0 88: 0 9: 0 25: 0 41: 0 57: 0 73: 0 89: 0

9: 0 25: 0 41: 0 57: 0 73: 0 89: 0

9: 0 25: 0 41: 0 57: 0 73: 0 89: 0 9: 0 25: 0 41: 0 57: 0 73: 0 89: 0 10: 0 26: 0 42: 0 58: 0 74: 0 90: 0

10: 0 26: 0 42: 0 58: 0 74: 0 90: 0

10: 0 26: 0 42: 0 58: 0 74: 0 90: 010: 0 26: 0 42: 0 58: 0 74: 0 90: 0 11: 0 27: 0 43: 0 59: 0 75: 0 91: 0

11: 0 27: 0 43: 0 59: 0 75: 0 91: 0

11: 0 27: 0 43: 0 59: 0 75: 0 91: 011: 0 27: 0 43: 0 59: 0 75: 0 91: 0 12: 0 28: 0 44: 0 60: 0 76: 0 92: 0

12: 0 28: 0 44: 0 60: 0 76: 0 92: 0

12: 0 28: 0 44: 0 60: 0 76: 0 92: 012: 0 28: 0 44: 0 60: 0 76: 0 92: 0 13: 0 29: 0 45: 0 61: 0 77: 0 93: 0

13: 0 29: 0 45: 0 61: 0 77: 0 93: 0

13: 0 29: 0 45: 0 61: 0 77: 0 93: 013: 0 29: 0 45: 0 61: 0 77: 0 93: 0 14: 0 30: 0 46: 0 62: 0 78: 0 94: 0

14: 0 30: 0 46: 0 62: 0 78: 0 94: 0

14: 0 30: 0 46: 0 62: 0 78: 0 94: 014: 0 30: 0 46: 0 62: 0 78: 0 94: 0 15: 0 31: 0 47: 0 63: 0 79: 0 95: 0

15: 0 31: 0 47: 0 63: 0 79: 0 95: 0

15: 0 31: 0 47: 0 63: 0 79: 0 95: 015: 0 31: 0 47: 0 63: 0 79: 0 95: 0 16: 0 32: 0 48: 0 64: 0 80: 0 96: 0

16: 0 32: 0 48: 0 64: 0 80: 0 96: 0

16: 0 32: 0 48: 0 64: 0 80: 0 96: 016: 0 32: 0 48: 0 64: 0 80: 0 96: 0

[1,1] NEAR TAC 2110 >

[1,1] NEAR TAC 2110 >[1,1] NEAR TAC 2110 >

4

-6 Verilink APS 2000 User Manual

Performance Monitoring

24-Hour Loss of Frame Count

A loss of frame synchronization on a T1 circuit causes a loss of all user data as long as the Out Of Frame (OOF) condition continues.

The 24-Hour Loss Of Frame Count indicates how many seconds, per fifteen minute interval, were during an Out Of Frame condition. These are seconds during which yo u may be certain that no user data passed. Since there are 900 seconds in a fifteen minute p eriod, the value for any one interval will never exceed 900.

A typical 24-Hour LOFC display is shown below in figure:

Figure 4-7 24-Hour Loss Of Frame Count

24 HOUR LOFC PERFORMANCE DATA 1-27-99 15:28:48

24 HOUR LOFC PERFORMANCE DATA 1-27-99 15:28:4824 HOUR LOFC PERFORMANCE DATA 1-27-99 15:28:48 Site Name: Tech Pubs SCC 2120

Site Name: Tech Pubs SCC 2120

Site Name: Tech Pubs SCC 2120Site Name: Tech Pubs SCC 2120 1, 1

1, 1

1, 1 1, 1 Valid Intervals 96 Seconds in Current Interval 830

Valid Intervals 96 Seconds in Current Interval 830

Valid Intervals 96 Seconds in Current Interval 830Valid Intervals 96 Seconds in Current Interval 830 LOFC in 24 Hours 0 LOFC in Current Interval 0

LOFC in 24 Hours 0 LOFC in Current Interval 0

LOFC in 24 Hours 0 LOFC in Current Interval 0LOFC in 24 Hours 0 LOFC in Current Interval 0

1: 0 17: 0 33: 0 49: 0 65: 0 81: 0

1: 0 17: 0 33: 0 49: 0 65: 0 81: 0 1: 0 17: 0 33: 0 49: 0 65: 0 81: 0 2: 0 18: 0 34: 0 50: 0 66: 0 82: 0

2: 0 18: 0 34: 0 50: 0 66: 0 82: 0

2: 0 18: 0 34: 0 50: 0 66: 0 82: 0 2: 0 18: 0 34: 0 50: 0 66: 0 82: 0 3: 0 19: 0 35: 0 51: 0 67: 0 83: 0

3: 0 19: 0 35: 0 51: 0 67: 0 83: 0

3: 0 19: 0 35: 0 51: 0 67: 0 83: 0 3: 0 19: 0 35: 0 51: 0 67: 0 83: 0 4: 0 20: 0 36: 0 52: 0 68: 0 84: 0

4: 0 20: 0 36: 0 52: 0 68: 0 84: 0

4: 0 20: 0 36: 0 52: 0 68: 0 84: 0 4: 0 20: 0 36: 0 52: 0 68: 0 84: 0 5: 0 21: 0 37: 0 53: 0 69: 0 85: 0

5: 0 21: 0 37: 0 53: 0 69: 0 85: 0

5: 0 21: 0 37: 0 53: 0 69: 0 85: 0 5: 0 21: 0 37: 0 53: 0 69: 0 85: 0 6: 0 22: 0 38: 0 54: 0 70: 0 86: 0

6: 0 22: 0 38: 0 54: 0 70: 0 86: 0

6: 0 22: 0 38: 0 54: 0 70: 0 86: 0 6: 0 22: 0 38: 0 54: 0 70: 0 86: 0 7: 0 23: 0 39: 0 55: 0 71: 0 87: 0

7: 0 23: 0 39: 0 55: 0 71: 0 87: 0

7: 0 23: 0 39: 0 55: 0 71: 0 87: 0 7: 0 23: 0 39: 0 55: 0 71: 0 87: 0 8: 0 24: 0 40: 0 56: 0 72: 0 88: 0

8: 0 24: 0 40: 0 56: 0 72: 0 88: 0

8: 0 24: 0 40: 0 56: 0 72: 0 88: 0 8: 0 24: 0 40: 0 56: 0 72: 0 88: 0 9: 0 25: 0 41: 0 57: 0 73: 0 89: 0

9: 0 25: 0 41: 0 57: 0 73: 0 89: 0

9: 0 25: 0 41: 0 57: 0 73: 0 89: 0 9: 0 25: 0 41: 0 57: 0 73: 0 89: 0 10: 0 26: 0 42: 0 58: 0 74: 0 90: 0

10: 0 26: 0 42: 0 58: 0 74: 0 90: 0

10: 0 26: 0 42: 0 58: 0 74: 0 90: 010: 0 26: 0 42: 0 58: 0 74: 0 90: 0 11: 0 27: 0 43: 0 59: 0 75: 0 91: 0

11: 0 27: 0 43: 0 59: 0 75: 0 91: 0

11: 0 27: 0 43: 0 59: 0 75: 0 91: 011: 0 27: 0 43: 0 59: 0 75: 0 91: 0 12: 0 28: 0 44: 0 60: 0 76: 0 92: 0

12: 0 28: 0 44: 0 60: 0 76: 0 92: 0

12: 0 28: 0 44: 0 60: 0 76: 0 92: 012: 0 28: 0 44: 0 60: 0 76: 0 92: 0 13: 0 29: 0 45: 0 61: 0 77: 0 93: 0

13: 0 29: 0 45: 0 61: 0 77: 0 93: 0

13: 0 29: 0 45: 0 61: 0 77: 0 93: 013: 0 29: 0 45: 0 61: 0 77: 0 93: 0 14: 0 30: 0 46: 0 62: 0 78: 0 94: 0

14: 0 30: 0 46: 0 62: 0 78: 0 94: 0

14: 0 30: 0 46: 0 62: 0 78: 0 94: 014: 0 30: 0 46: 0 62: 0 78: 0 94: 0 15: 0 31: 0 47: 0 63: 0 79: 0 95: 0

15: 0 31: 0 47: 0 63: 0 79: 0 95: 0

15: 0 31: 0 47: 0 63: 0 79: 0 95: 015: 0 31: 0 47: 0 63: 0 79: 0 95: 0 16: 0 32: 0 48: 0 64: 0 80: 0 96: 0

16: 0 32: 0 48: 0 64: 0 80: 0 96: 0

16: 0 32: 0 48: 0 64: 0 80: 0 96: 016: 0 32: 0 48: 0 64: 0 80: 0 96: 0

[1,1] NEAR TAC 2110 >

[1,1] NEAR TAC 2110 >[1,1] NEAR TAC 2110 >

Reset Registers

The Reset Registers command on the

Menu

is used to clear out all of the accumulated information being

Performance Monitoring

held in the ESF registers. All of the values in the displays available from the

Performance Monitoring Menu

are reset to zero, the

number of valid intervals is reset to zero. A typical use of this option would be at the completion of an

installation. If a T1 facility has been serviced and it is believed that any problems have been corrected it may be desirable to reset th e registers so that any errors reported are known to be new.

Verilink APS 2000 User Manual

4

-7

Performance Monitoring

Error Event Monitoring

CRC-6 Error Event

Out-of-Frame

(OOF) Event

Bipolar Violation

(BPV)

The CSU circuits monit or the incoming signals f rom both direc tions for the error events described below.

In ESF framing, the CSU uses the Cyclic Redundancy Check (CRC) error-checking algorithm for real-time logic error che cking. The transmitti ng C SU ca l cu l a te s a s ix - bit CRC code for the entire ESF frame (4,632 bits) and obtain s a six-bit (CRC-6) coded signature for those data bits. It then tr ansmits this c ode to the far-end CSU in the overhead bits of the next ESF frame. The receiving CSU recalculates the CRC of the received ESF and compares it wit h the CRC sent over the network. If these codes do not match, one or more errors have occurred in data transmission. The receiving CSU will declare a CRC-6 error event and the sending CSU will retransmit the fr ame. If CRC regeneration is disabled, the transmitting CSU does not insert the code into a new CRC signal onto the ne two rk.

An OOF event occurs when any two of four consecutive frame bits of the incoming signal are incorrect.

The CSU circuits detect and remove unintentional (non-B8ZS) BPVs in both directions of transmission in all framed modes. In the unframed transparent mode, BPVs are not corrected in the equipment-to-network direction. If the CSU is configur ed to receive a B8ZS-coded signal, it dete ct s inten tio na l B8Z S BPV s bu t doe s not indicate that these BPVs have been received. B8ZS bipolar violations a re either passed through or decoded, depending on the option setting of the CSU.

Frame Bit Error

(FE) Event

Severely Errored

Framing (SEF)

Event

Low Density State

Loss of Signal

(LOS) State

An FE is a framing bit error that occurs in the received signal from either direction of transmission.

The CSU declares an SEF event when two or more FEs occur within a 3-millisecond period. For ESF framing, this interval may or may not coincide with an ESF frame (6 framing bits).

A low-density state occurs when the incoming signal from the equipment violates the ONEs density requirement for which the CSU is configured. Whenever the CSU inserts a ONE into the incoming signal from the equipment to maintain the minimum pulse density, it generates and records an equipment low-density second (DTED).

A loss of signal occurs when the network signal is absent for more than approximately 175 milliseconds of zeros (±75 zeros) and is also treated as an OOF. In the t ransmit direction toward the network, an LOS causes the CSU to send the selected keep-alive signal to the ne tw ork.

4

-8 Verilink APS 2000 User Manual

Performance Monitoring

Out-of-Frame

(OOF) State

Alarm Indication

Signal (AIS) State

Loss of Frame

(LOF) Alarm State

Bit Error Rate (BER)

An OOF state begins with an OOF event and ends when a reframe occurs. An OOF state from the network causes a Severely Errored Second and a Severely Erro red Framing Second to be declared.

This state occurs when the CSU detects an AIS in the incoming signal from the network .

This state occurs when the CSU detects an LOF alarm (Red Alarm) on the incoming signal from the network. A loss of frame is declared when a LOS or OOF occurs continuously for a period of 2 to 3 seconds, and is cleared after 10 seconds without another LOS or OOF event. For an intermittent LOS at LOF, an integration with a slope of 1/4 to 1/15 occurs which will declare an LOF alarm when the integration threshold is reached.

The CSU uses the CRC-6 error events to calculate the bit error rate for the signal received fro m the network.

Verilink APS 2000 User Manual

4

-9

Performance Monitoring

Performance Data Registers

ESF Error Event

Errored Second

Bursty Errored

Second (BES)

NOTE

(ES)

The CSU uses the error events above to derive additional performance data. This data is stored in registers and can be retrieved by an Access Manager or local ASCII terminal operator. The performance data meets the requirements of AT&T TR-54016 and ANSI T1M 1. 3. Ve ril in k- de fin ed dat a is al so gat he red and s tore d for operator retrieval.

An ESF error event is an extended superfra me t hat co ntains at least one CRC-6 error event or OOF event. ESF error events are used to derive Errored Seconds, Severely Errored Seconds, Bit Error Rate, Unavailable Signal State, Unavailable Seconds, and Bursty Errored Seconds.

An ES is a second with at least one ESF error event. However, errored seconds are not counted when Unavailable Seconds (UASs) are counted.

A bursty errored secon d i s a se cond with 2 to 319 CRC-6 error events. Bursty errored seco nds are n ot counted when an SES or UAS is counted.

NOTE:

Bursty Errored Seconds are referred to as Errored Seconds Path (ES-Ps) in the proposed ANSI T1M1.3 perfor mance standard.

Severely Errored

Second (SES)

Unavailable Signal

State (UASS)

Unavailable

Second (UAS)

Loss-of-Frame

Count (LOFC)

Errored Second -

Line (ES-L)

An SES is a second with 320 or more CRC-6 error events, or one or more OOF events. Severely errored seconds are not counted when UASs are counted.

The CSU retroactively declares a UASS at the onset of 10 consecutive SESs and clears the UASS at the onset of 10 consecutively non-severely errored seconds. The UASS is equivalent to a Failed Signal State (FSS).

The CSU declares a UAS for an y second du ring wh ich a UA SS exi sts. An unavailable second is equivalent to a Failed Second (FS).

An LOFC is an accumulation of the number of times an LOF is declared. A loss of frame is declared when an LOS or OOF occurs continuously for 2 to 3 seco nds, and is cleared after 10 seco nds without a LOS or OOF event.

An AMI ES-L is a second in which one or more bipolar violations are received from the network. A B8ZS ES-L is declared when a bipolar violation is received that is not part of a B8ZS substitution pattern.

4

-10 Verilink APS 2000 User Manual

Performance Monitoring

Severely Errored

Framing Second

(SEFS)

Loss of Signal Second (LOSS)

Alarm Indication

Signal Second

(AISS)

Remote Alarm

Indication Second

(RAIS)

Bit Error Rate

Alarm Second

(BERS)

Loss of frame

Second (LOFS)

An SEFS is a second experiencing one or more events of two or more frame bit errors in a 3-millisecond period.

An LOSS is a second in which an LOS condition exists.

An AISS is a second in which the CSU receives an AIS from the network.

This is a second during which the CSU detects an RAI (Yellow Alarm) from the network.

This is a count of each second during which a network BER alarm condition existed.

An LOFS is a count of each second in which the CSU was in a LOF state.

Out-of-Frame

Second (OOFS)

Equipment Low-

Density Second

(DTED)

Equipment Bit

Error Rate Alarm

Second (DBER)

Equipment Errored

Second

Equipment UAS,

ES-L, and OOFS

An OOFS is a second experiencing one or more OOF events.

This is a second during which a low-density state occurs and the CSU stuffs a ONE into the signal from the equipment to maintain minimum ONEs density on the DS-1 network. The CSU also records a DTED whenever it applies a keep-alive signal to the network.

This is a second during whic h the incoming bit error rate from the equipment exceeds the operator-defined threshold.

This is the same as the ES previously described, except that it is detected on the incoming signal from the DS-1 equipment.

These are the same as the UAS, ES-L, and OOFS previously described, except that they are detected on th e incoming signal from the DS-1 equipment.

Performance data processing

The CSU circuits store and process the DS-1 performance data described above in three stages, or strata. The following sections

Verilink APS 2000 User Manual

4

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Performance Monitoring

list the data processing for the AT&T TR-54016, ANSI T1M1.3, Verilink, and equipment-side performance data.

The CSU stores part of the 24-hour pe rf ormance data in two separate register sets. One set is for the customer (User) and the other set is for the telephone company or other provider. Only the TR-54016 registers are in the carrier set.

All registers provide 24-hour data registers for each type of performance data colle ct e d.

Table 0-1

Types of Performance Data

Telco Registers Verilink Registers

AT&T TR 54016

ANSI TIM1.3

(User

Network

LOFC ES-L RAIS DTED BES SEFS LOFS OOFS UAS SES BERS DBER SES ES-B OOFS UAS

LOSS ES UAS AISS

a

ES

a. The ES register is equivalent to the ANSI ES-P register.

Equipment

signal

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Chapter

5

Diagnostics

This chapter focuses on using LEDs, loopbacks, and test signals as tools to diagnose and troubleshoot problems.

It will help you isolate performance problems originate.

What tools are available

Access System 2000 equipment provides several built-in features that make circuit maintenance and testing possible:

Loopbacks

LEDs

Test signals

where

---within the physical equipment---

These can isolate problems in the signal path. Each loopback includes a specific portion of the signal path, and different loo pbacks may “overlap” a common area. You can isolate a problem area by applying a logical succession of loopbacks and comparing which loopbacks succeed and which fail.

These provide a visual indication of normal and abnormal conditions.

Each CSU can apply a test signal to the ci rcuit thro ugh operator-issued commands.

The various CSU jacks and LEDs are shown in Figure 5-1.

Figure 5-1 SCC 2120 and TAC 2110 Controls and Indicators

SCC

2120

EXE

0 2

FUNCTION

EQPT

STAT

NET

CRAFT

IN

OUT

IN

OUT

NET

EQPT

NET

MON

Thumbwheel Switches and Command

Push button

Execution

Equipment, CSU

Status and

Network LEDs

Modular Jack for ASCII Terminal Connection

Signal Access

Jacks (Bantam)

NOT

USED

OUT

NET

EQPT

TAC 2110

EQPT

STAT

NET

IN

EQPT

IN

NET

MON

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5

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Diagnostics

CSU LEDs

Figure 5-2 CSU LED states

LED State EQPT STAT NET

Green-solid Equipment is OK,

Green-flashing Not used. Thumbwheel switch

Amber-solid SCC is looped toward

Amber-flashing Not used. CSU is applying a test

Red-solid Any contin uous error

This section describes the function of the CSU’s LED (Light E mitting Diode) indicators.

Not Used. A normal signal is regardless of network connection.

the equipment (RLB or ELB) and no errors are being received.

condition (fo r example, LOS, LOF, AIS).

operator is accessing

the CSU at the node

controller.

CSU receiving APS

switch code.

signal to the circuit.

Any alarm. Continuous errors on

being received from the network (all OK).

Not used.

SCC is looped toward network vi a an LL B or PLB and no errors a re received from the network.

Not used.

the network (LOS, LOF, RAI, AIS).

Red-flashing BPV or CRC-6 Error,

low density indi cator. Update speed: 50100 m/s.

Green-Amber alternating

Red-Amber alternating

None illuminated SCC is not powered

Switched to protection line.

SCC is looped toward the equipment (RLB, ELB) and errors are being received from the equipment.

up or has lost power. Self test failure.

Power-up self test

failure.

Good signal is being

received, but CSU is

receiving the same

APS net code it is

sending (unless the

NET LED is flashing

green-amber also).

This could be from a

loopback, not

initializing the

system, or this

working line has

gone bad and

switched to the spa re

line.

Errors received

during user-initiated

test.

All OK. No power to SCC.

BPV or CRC-6 errors.

CSU receiving a clean, spurious signal (there are no net codes in the received signal).

CSU is looped toward the network (LLB, PLB) and errors are being received (BPV or CRC-6).

Self test failure.

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Using Diagnostics

Diagnostics

“Solid Red” events take priority over “Flashing Red” events, except when a loopback is enabled.

Alarm Status

A typical way of using the following steps:

1. Establish a loopback somewhere in the circuit path.

2. Start trans m i t ti n g a te s t pat te r n.

3. Observe the test error counter to see if the test pattern is received as it was sent.

a. If no errors are observed, move the point of loopback

further away to test more of the circuit path, or

b. If errors are observed, move the point of loopback closer

to determine the source of the problem.

4. Stop the test pattern, drop all loopbacks, then: a. Place the T1 circuit back into service if all tests passed, or b. Contact the appropriate vendor if a problem was found.

In addition to off e ring the ability to put up a nd take down loopbacks and test patterns, the information about the current status of the DSX-1 equipment interface and DS-1 network interface.

Diagnostics Menu

might involve the

also offers

Diagnostics Menu

The top half of the of ASCII characters which represents the operation of the CSU. The equipment interface is shown on the left and the network interface is shown on the right. In the area to the left and right of the line drawing of a framer, status information is represented by words displayed in upper case characters.

A sample of the In this example, the word

(left hand) and network (right hand) sides of the display. When the words

PULSES

Verilink APS 2000 User Manual

Diagnostics Menu

PULSES

appears alone, that interface has no alarms.

includes a drawing made up

is shown below in Figure 5-3.

appears on both the equipment

5

-3

Diagnostics

Figure 5-3 Diagnostics Menu

APS DIAGNOSTIC -- FW Rev 4.0 HW Fab 0.8 Type TAC 2110 --

APS DIAGNOSTIC -- FW Rev 4.0 HW Fab 0.8 Type TAC 2110 --APS DIAGNOSTIC -- FW Rev 4.0 HW Fab 0.8 Type TAC 2110 --

|-----------------------|

|-----------------------| |-----------------------|

| |

| | | |

-------<< eq <<-------|----------|f|----------|-------<< net <<-------

-------<< eq <<-------|----------|f|----------|-------<< net <<--------------<< eq <<-------|----------|f|----------|-------<< net <<------ | |r| | PULSES

| |r| | PULSES

| |r| | PULSES | |r| | PULSES

| |a| |

| |a| | | |a| |

| |m| |

| |m| | | |m| |

PULSES | |e| |

PULSES | |e| | PULSES | |e| |

------->> eq >>-------|----------|r|----------|------->> net >>-------

------->> eq >>-------|----------|r|----------|------->> net >>-------------->> eq >>-------|----------|r|----------|------->> net >>------ | |

| |

| | | |

|-----------------------|

|-----------------------| |-----------------------|

X) exit menu Y) enable loops Z) reset alarm T) test time (15 SEC)

X) exit menu Y) enable loops Z) reset alarm T) test time (15 SEC) X) exit menu Y) enable loops Z) reset alarm T) test time (15 SEC)

__eq loops__ __err counter__ __net signals__ __net loops__

__eq loops__ __err counter__ __net signals__ __net loops__ __eq loops__ __err counter__ __net signals__ __net loops__

(D&I_56K)

(D&I_56K) (D&I_56K)

R) repeater A) show cntr 1) qrss L) line

R) repeater A) show cntr 1) qrss L) line R) repeater A) show cntr 1) qrss L) line

E) equip B) clear cntr 2) 3 in 24 P) payload

E) equip B) clear cntr 2) 3 in 24 P) payload E) equip B) clear cntr 2) 3 in 24 P) payload

N) end tests 3) 1 in 8

N) end tests 3) 1 in 8 N) end tests 3) 1 in 8

i) re-establish FE 4) 511 _send net loop code_

i) re-establish FE 4) 511 _send net loop code_ i) re-establish FE 4) 511 _send net loop code_

(D&I_56K)

(D&I_56K) (D&I_56K)

U) inband up

U) inband up U) inband up

D) inband down

D) inband down D) inband down

[1,1] NEAR TAC 2110 >

[1,1] NEAR TAC 2110 >[1,1] NEAR TAC 2110 >

Since a T1 circuit operates by sending pulses to represen t a logical “one”, the indication

PULSES

means that the T1 CS U portion of this SCC 2120 in the example above does see pulses on both the equipment (left side) and network (right side) inter faces. Therefore, of all the messages which might appear on this menu in upper case characters,

PULSES

is the only message which does not represent an alarm condition. Pulses are the logical opposite of a Loss Of Signal (LOS) condition.

Figure 5-4 below shows the result of disconnecting the T1 circuit

from an SCC 2120 module. The word

PULSES

no longer appears on the right hand side where network status is indicated. Instead, a number of alarm conditi ons are rep ort ed inc ludi ng

LOSS, CRC ERRORS

NOTE:

Whenever a T1 CSU reports Signal Loss, it will report other

SIGNAL LOSS

and

.

ALARM, FRAME

alarms as well. The other alarms are caused by the signal loss condition. Ignore the other alar ms and find the cause of the Signal Loss to restore the T1 to service.

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-4 Verilink APS 2000 User Manual

Figure 5-4 Diagnostics Menu

APS DIAGNOSTIC -- FW Rev 4.0 HW Fab 0.8 Type TAC 2110 --

APS DIAGNOSTIC -- FW Rev 4.0 HW Fab 0.8 Type TAC 2110 --APS DIAGNOSTIC -- FW Rev 4.0 HW Fab 0.8 Type TAC 2110 --

|-----------------------| ALARM

|-----------------------| ALARM |-----------------------| ALARM

| | FRAME LOSS

| | FRAME LOSS | | FRAME LOSS

-------<< eq <<-------|----------|f|----------|-------<< net <<-------

-------<< eq <<-------|----------|f|----------|-------<< net <<--------------<< eq <<-------|----------|f|----------|-------<< net <<------ | |r| | SIGNAL LOSS

| |r| | SIGNAL LOSS

| |r| | SIGNAL LOSS | |r| | SIGNAL LOSS

| |a| |

| |a| | | |a| |

| |m| | CRC ERRORS

| |m| | CRC ERRORS | |m| | CRC ERRORS

PULSES | |e| |

PULSES | |e| | PULSES | |e| |

------->> eq >>-------|----------|r|----------|------->> net >>-------

------->> eq >>-------|----------|r|----------|------->> net >>-------------->> eq >>-------|----------|r|----------|------->> net >>------ | |

| |

| | | |

|-----------------------|

|-----------------------| |-----------------------|

X) exit menu Y) enable loops Z) reset alarm T) test time (15 SEC)

X) exit menu Y) enable loops Z) reset alarm T) test time (15 SEC) X) exit menu Y) enable loops Z) reset alarm T) test time (15 SEC)

__eq loops__ __err counter__ __net signals__ __net loops__

__eq loops__ __err counter__ __net signals__ __net loops__ __eq loops__ __err counter__ __net signals__ __net loops__

(D&I_56K)

(D&I_56K) (D&I_56K)

R) repeater A) show cntr 1) qrss L) line

R) repeater A) show cntr 1) qrss L) line R) repeater A) show cntr 1) qrss L) line

E) equip B) clear cntr 2) 3 in 24 P) payload

E) equip B) clear cntr 2) 3 in 24 P) payload E) equip B) clear cntr 2) 3 in 24 P) payload

N) end tests 3) 1 in 8

N) end tests 3) 1 in 8 N) end tests 3) 1 in 8

i) re-establish FE 4) 511 _send net loop code_

i) re-establish FE 4) 511 _send net loop code_ i) re-establish FE 4) 511 _send net loop code_

(D&I_56K)

(D&I_56K) (D&I_56K)

U) inband up

U) inband up U) inband up

D) inband down

D) inband down D) inband down

[1,1] NEAR TAC 2110 >

[1,1] NEAR TAC 2110 >[1,1] NEAR TAC 2110 >

Diagnostics

Status Messages

The status messages which may appear on the

Diagnostics Menu

are listed in Table 5-1 below:

Table 5-1 Diagnostic Menu Status Messages

Message Meaning

ALARM Yellow Alarm (RAI). The CSU is rece iving a Remote Alarm In dication S ignal on th e port.

FRAME LOSS Out Of Frame (OOF). The CSU does not detect a valid framed signal on the port. If

SIGNAL LOSS Loss Of Signal (LOS). The CSU does not detect any pulses on the port, this is the worst

CRC ERRORS Cyclic Redundancy Check errors (CRC-6). The CSU detects errors using the CRC-6

LOW DENSITY The T1 signal on the port does not meet the required average ones density of 12.5%.

This signal is sent by a device in a red alarm condition, such as AIS, LOS or LOF.

pulses are also present, may indicate receipt of unframed all ones, Alarm Indication Signal (AIS), which is often used as a Keep Alive signal on T1 circuits.

possible alarm condition on a T1 port, ignore other alarms and resolve the cause of the LOS first.

feature of ESF framing, applies only to T1 circuits or equipment using ESF framing.

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-5

Diagnostics

Message Meaning

BPV The CSU is detecting Bipolar Vio l ati ons on th e p ort, two o r mo re pul s es in a row were

EXT CLK LOSS The CSU is configured to use an external clock signal and that signal is not detected.

PULSES Not an alarm condition, the CSU does see valid pulses on the port. When a CSU is in

Diagnostic Commands

Table 5-2 Diagnostic Commands

Menu Option Description Instructions

X) exit menu Exits to menu above. Returns to the SCC 2120 Y) enable loops Determines whether

Z) reset alarm Clears alarm history

of the same polarity, violating the Alternating Mark Inversion requirement.

Mux mode, PULSES should always be displayed on the equipment side of the menu. In Mux mode only synchronous serial interfaces are used and the CSU does not expect to see any particular framed pattern of pulses.

There are seventeen command options available on the SCC 2120

Diagnostics Menu

. Table 5-2 lists all of these commands:

Main Menu

Normally this selection should be enabled CSU will res pond to received standard CSU loop-up codes.

for the current 15 minute interval.

In a telephone carrier central office environment this option

might be disabled

Extinguishes red LED alarm conditions on front panel of the

SCC 2120 CSU after installation or after resolving a service

problem

T) test time Sets the length of time

tests and loopbacks will be allowed to run.

FOREVER is suggested by Verilink.

R) repeater Establishes a repeater

loopback. Useful for testing local

CSU hardware.

E) equip Establishes an

equipment loopback.

A) show cntr Displays test error

counter, increments for each error detected.

B) clear cntr Resets test error

counter.

N) end tests Ends tests and LOCAL

loopbacks.

1) qrss Starts QRSS test. CSU transmits a Quasi-Random test pattern while monitoring

ENTER INTERVAL (DEFAULT, x SEC, x MIN, x HR, FOREVER):

Type FOREVER or type a numeric value followed by SEC for

seconds, MIN for minutes, HR for hours

example

The CSU loops data it is about to transmit back to the receive

circuitry, local equipment should see its own signal

This test is functionally equivalent to placing a T1 loopback

plug into the network port of the CSU

The local DSX-1 equ ipment port is looped bac k directly to the

local equipment, useful for verifying cable connections

Used to monitor a test in progress, when the CSU transmits a

test pattern, it expects to receive the same test pattern

unaltered, either from a loopback or a compatible test signal

source

Used to reset the test error counter to zero after a test or

before a new test

Used to end any running test patterns as well as terminating

any loopbacks in the local CSU

the receive pair for the same signal to be returned

This test is widely supported by telepho ne carrie r test

facilities

45MIN

This test pattern is valid for all T1 circuit types

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-6 Verilink APS 2000 User Manual

Menu Option Description Instructions

Diagnostics

2) 3 in 24 Starts 3 in 24 test. CSU transmits a 3 in 24 test pattern while monitoring the

3) 1 in 8 Starts 1 in 8 test. CSU transmits a 1 in 8 pattern, which guarantees one bit of

4) all 1 Starts all ones pattern Use of this pattern is

suggested whenever any T1 circuit is tested.

L) line Initiates a line

loopback.

receive pair for the same signal to be returned. 3 in 24 guarantees that of any 24 bits sent, at least 3 will be

ones, thus strings of twenty one contiguous zeroes are possible.

Because this pattern may have strings of up to 21 zeroes in a row, it may fail on some perfectly good AMI T1 cir cuits as equipment in the circuit enforces ones density.

every 8 will be a one, while monitoring the receive pair for the same signal to be returned.

This test pattern is valid for all T1 circuit types. The CSU transmits a framed pattern of all ones and monitors

receive data for the same pattern. Because it produces maximum current levels, this test is

especially good at finding some problems like bad repeater cards or resistive punchdown connections.

All ones is a valid test on all T1 circuits. Line loopback faces the T1 circuit, all data received from the

T1 circuit is sent back to the T1 circuit. This is the same loopback which o ccu rs when a CSU rece ive s

a loop-up code from the network.

P) payload Initiates a payload

U) inband up Sends a standard CSU

D) inband down Sends a standard CSU

Signal Access Jacks

loopback.

loop-up code toward the far end CSU.

loop-down code to the far end CSU.

The SCC 2120 also has three pairs of bantam jacks for signal access by an external T1 test set.

Payload loopback faces the T1 circuit like the line loopback. A payload loopback passes through more of the CSU circuitry

while the line loopback occurs closer to the network port. Under normal circumstances send in g th e lin e loop-up code

will cause the far end CSU to enter a line loopback state.

Under normal circumstances sendin g th e lin e loop-down code will ter minate a line loopback state in the far end CSU.

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Diagnostics

Table 5-3 SCC 2120 and TAC 2110 Bantam Jacks

Label Function

EQPT IN jack The

EQPT OUT jack The

NET IN jack The

NET OUT jack The

MON jacks The

Figure 5-5 SCC and TAC Signal Access Jacks

EQPT MON

EQPT OUT

EQPT IN

To/Fr o m DS- 1 Equipment

Part of

CIM 2024 or

CIM 2010

EQPT IN

jack breaks the transmission path toward the DS-1 equipment. This allows an operator to apply an external test signal to the equipment receiver.

EQPT OUT

jack breaks the transmission path toward the network and looks toward the DS-1 equipment transmitter. This jack can be patched to the test set receiver for signal measurement.

NET IN

jack looks toward the network when accessed. It can be patched to the test set transmitter for test signal application to the network.

NET OUT

jack permits external measurement of

the incoming signal from the network.

jacks are non-intrusive. When accessed, each

MON

jack permits signal monitoring by an external test set without interrupting normal transmission.

SCC 2120 or TAC 2110

NET IN

NET MON

NET OUT

LBO

Repeater

Part of

CIM 2024 or

CIM 2010

Surge Protect

To/Fr o m Network

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-8 Verilink APS 2000 User Manual

T1 and DSO Loopback and Test Functions

The Craft interface provides for selection of various loopback and test modes. These functions may also be controlled via SNMP. Loopbacks may be accomplished for either the aggregate T1 signal or for a portion of a T1 (one or more DSO channels). T e st patterns may be sent in, and extracted from, either the entire aggregate T1 bandwidth or in one or more DSO channels on a drop and insert basis. This section describes the various loopback and test modes.

Figure 5-6 CSU Loopbacks

Diagnostics

Local Loopbacks

T1 Payload

Loopback (PLB)

LBO

To/From Networ

Repeate

To/From

DS-1

Equipment

ELB PLB

CSU

Signal

Processing

Circuits

LLB RLB

All of the following loopbacks activate the LED indicators on the CSU front panel.

Local loopb a cks include the Payload Loopba ck (PLB) and the Line Loopback (LLB ).

This command causes the T1 payload (exclusive of framing bits, CRC bits and FDL bits) to be looped back toward the far end when asserted at the near end of a circ ui t. It also automatically forces both ends of a circuit to switch to the protection line so as not to disrupt traffi c. Because the APS c ommunication channel is not looped back (since it is carried in the ESF FDL bits), the APS functionality does not recognize the loopback condition automatically. For this reason, the payload loopback command also asserts the

MANUAL

APS control mode in order to force a switch. When the payload loopback function is turned off, the APS control mode reverts to whichever control mode it was in prior to th e payload loopback state.

Line Loopback

(LLB)

This command causes the entire T1 signal (including framing bits, CRC bits, and FDL bits) to be looped back toward the far end when asserted at the near end of a circuit. The APS functionality recognizes its own unique network code on the ESF FDL and forces a switch to the protection line. The APS control mode currently in effect will operate normally while the circuit is in the LLB state.

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Diagnostics

Remote Loopbacks

T1 Inband Loop Up

T1 Inband Loop

Down

V.54 Inband Loop

Up

Remote loopbacks include the T1 inband loop up and loop down, as well as the V.54 loopbacks.

This command, when asserted at the near end, causes the industry standard T1 inband loop up code to be sent, inband, to the far end. The far end responds by looping its entire T1 aggregate signal back toward the near end. The APS functionality also recognizes the looped condition and forces both ends to switch to the protection line.

This command, asserted at the near end, causes standard T1 loop down code to be sent, inband, to the far end. The far end responds by dropping its loopback state (if present) and returning to normal signal transmission. The APS control mode will determine if the circuit automatically resets from the protection line or must be reset manually.

This command, asserted at the near e nd, causes the Industry Standard V.54 FT1 DS0 l oopback code to be sent to the f ar end, in only the DSO channel(s) selected. The remainder of the outgoing T1 signal is unaffected. Note that the far end APS equipment ignores this V.54 loopback command, but passes it through the circuit toward any V.54 compatible terminating DSU/CSU located further down the circuit. The terminating DSU/CSU will respond by looping back the selected DSO channel or FT1 bundle toward the near end. The DSO loopback condition does not cause the APS system to switch.

V.54 Inband Loop

Down

Configuration of

V.54 Loopback

Testing

This command is identical to the V.54 inband loop up command except that the V.54 code is for loop down and causes an active DSO loopback condi tion to be dropp ed at the termin ating DSU/C SU. Again, this function does not effect APS.

DSO loopbacks and test functions are configurable and controllable both locally via the Craft interface, or remotely via SNMP (see the Verilink Enterprise MIB) or a Telnet session.

The Craft interface provides for sending inband loopback commands and for sending/receiving test signals (QRSS, etc.).

Use the mode. mode must be selected if you are using full T1 loopbacks or test signals. Choices 2 and 3 are the drop and inser t choices; Choice 2 = DSO testing at n x 56kbs; Choice 3 = DSO testing at n x 64kbs.

When you select either choice 2 or 3 (for DSO loopbacks/tests), an additional menu selection is provided (Item “D”) to select one or more DSO channels. Select channels (1-24) using menu item “D.”

CSU Configuration

menu to select a specific loopback/test

menu, Item A, Choice 1, Full T1 te sti ng

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Diagnostics

After making the initial speed and channel assignment, you can switch back and forth between full T1 testing and DSO testing by using the testing; Choi c e 2 = DSO testing at n x 56kbs; and Choice 3 = DS O testing at n x 64kbs. The originally selected channels remain in effect until changed and need not be re-selected when switching between modes.

CSU Configuration

menu, option A. Choice 1 = Full T1

Commanding the

Remote DSO

Loopback

Sending Test

Patterns and

Detecting Errors

Use the Craft interface loopbacks and send/receive test patterns. The menu also provides a graphic which shows the received signal condition in real time.

The U and D menu selections initiate the sending of inband loop-up or inband loop-down codes. Since both T1 loop codes and V.54 loop codes are inband signals, which type is sent depends upon the drop and insert mode selected in the Choice 1 (Full T1) were selected in the then asserting the sending of T1 loop-up inband code. If Choice 2 or 3 were selected in the would be sent, in only the selected DSO channels when is asserted in the

Down

selected drop and insert mode is indicated following the and

In the one of four different test patterns to the far end, (in place of t he normal traffic signal), and for monitoring the received signal for the same pattern. Any errors detected are indic ted both in the graphic and in an error counter. This function may be applied to either the full T1 signal or to the selected DSO channels in the same manner as loopback commands discussed above. If you make no selection for a test pattern, then the normal data flowing through the CSU in the selected DS O continu es toward the far end. N ote that sending DSO test patterns in the selected channels is indepen dent of channel loopbacks and may be accomplished whether or not a DSO loopback has been commanded.

(D). Note that while in the

Inband Down

Diagnostics Menu

Inband Up

CSU Configuration

Diagnostic (DIAG)

(U) in the Diagnostics Menu would cause

menu, then V.54 loo p- u p code

Diagnosti c s Menu

Diagnostics Menu

message.

, Choices 1, 2, 3, and 4 provide for sending

menu to command

CSU Configuration

Inband Up

. The same applies to

, the currently

Inband Up

menu. If

menu,

Inband

Special

Considerations

when Using V54LB

The V.54 loopback commands may be sent at any time on any line, whether a system is switched to the spare or is operating on its normal working line. However, if the DTE of interest is switched to the spare, then the V.54 loopback and test commands must be initiated from the spare switch/CSU. This is because the working line is no longer in the end-to-end circuit. If V.54 loopback or test signals are initiated on the vacated working line, they will arrive at the far end switch/CSU, but go no further.

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Diagnostics

CSU alarms

The CSU is capable of detecting various equipment and network trouble conditions, including loss of frame (LOF), and loss of signal (LOS). It reports each condition as an alarm if the trouble continues for an operator-specified time interval.

Loss of Signal

Out-of-frame and Loss of Signal

The CSU goes into a loss-of-signal (LOS) state upon detecting approximately 175 (±75) milliseconds of consecutive ZEROs (231,600 bits) on the incoming signal from the equipment. The CSU sends a 511 pattern keep-alive to the network 3 milliseconds later. Otherwise, it continues to perform network density enforc ement. The signal sent by the CSU to the network upon occurrence of an equipment-side LOS is selectable by the user.

The CSU clears an LOS alarm upon detecting a period of 10 seconds (default time interval) in which no LOSs or OOFs occur. The alarm clearing interval is user-programmable from 0 to 255 seconds.

The CSU goes out of frame when the incoming network or equipment signal is lost, or when it cannot frame up on the incoming signal. The out-of-frame condition occurs when the CSU detects errors in any two of four consecutive framing bits.

If the OOF condition pers ists for two to three seconds, the CSU enters a loss-of-frame (LOF) state. It reports an LOF alarm after an additional user-defined delay of 0 to 255 seconds (default = 3 seconds).

Loss-of-frame

When the CSU detects LOF on the incoming net work signal, it sends either the LOF alarm-causing signal or a 511 pattern to the equipment, as configured by the operator. It also passes the DS-1 signal from the equipment to the network.

Figure 0-1

5

-12 Verilink APS 2000 User Manual

Loss of Frame and Yellow Alarm Processing

3. CSU sends RAI to network; also

2. Equipment sends Yellow Alarm to CSU

XMT RCV

DS-1 EQPT

RCV XMT

1. CSU passes LOFcausing signal or AIS to equipment

transcodes to ESF format if necessary

CSU CSU

(NETWORK)

LOF detected here

4. Far-end CSU sends RAI to equipment; transcodes to SF if necessary

DS-1 EQPT

Diagnostics

Yellow Alarm Transcoding:

Clearing the RAI

Loss of Frame

From the

Equipment

AIS Alarm

If the equipment uses SF and the network uses ESF, the CSU transcodes the incoming Yellow Alarm (RAI) from SF to ESF format and sends the transcoded RAI to the network over the ESF Data Link. Transcoding to ESF occurs if the CSU detects an incoming SF RAI for at least 400 milliseconds. Alarm transcoding can be configured individually for each direction of transmission. The default setting is for transcoding to occur in the equipment-tonetwork direction, and not to occur in the network-t o-equipment direction.

The CSU at each end stops transcoding the RAI when it no longer detects the RAI for the times listed above for alarm detection.

If the CSU detects LOF on the incoming signal fr om the equipment, it either passes the incoming equipment signal or sends a 511 pattern to the network, as configured by the user. If the LOF was caused by a loss of signal from the equipment, the option for LOS (keep-alive option) overrides the LOF option.

The CSU declares an AIS alarm upon detecting an unframed ALLONEs pattern from the network or equipment for 150 milliseconds. The CSU clears the alarm when unframed ALL-ONEs are no longer detected. The AIS alarm-clear detection time is also 150 milliseconds. Alarm reporting is based on the alarm set and clear delay time. The default values are 3 seco nds for setting and 10 seconds for clearing. These values are user-programmable from 0 to 255 seconds.

Keep-alive Signal

The CSU transmits a 511 pattern keep-alive signal to the network three (3) milliseconds after detecting an LOS condition from the equipment for a period of 175 (±75) milliseconds of zeros.

Verilink APS 2000 User Manual

5

-13

Diagnostics

5

-14 Verilink APS 2000 User Manual

Appendix

A

Specifications

SCC 2120 and TAC 2110

Interfaces

DS-1 Equipment

Line Rate Line Code Framing Formats Impedance Input Level

Pulse Width Pulse Afterkick Output Level Output LBO Pulse Density

Enforcement Pre-equalization Surge Protection

1.544 Mbps AMI, B8ZS AMI, B8ZS Unframed, SF, ESF Unframed, SF, ESF 100 ohms ± 5% 100 ohms ± 5%

3.0 V ± 0.3 V base-to-peak, attenuated by up to 655 feet of cabling

324 ±45 nanoseconds at half amplitude 324 ±45 nanoseconds at half amplitude 10% to 30% of pulse peak 10% to 30% of pulse peak DSX-1 into 100 O hms 3.0 V ± 0.3 V base-to-peak N/A 0, 7.5, or 15 dB (0 to 3000 feet), selectable N/A 12.5% average density and 80 zeros, AT&T

0 to 655 feet, selectable N/A Up to 400 Vp-p Up to 400 Vp-p

Network

±

32 ppm 1.544 Mbps

DS-1 attenuated by 0 to 27.5 dB

62411, 15 zeros, 80 zeros, or no ne

±

32 ppm

Loopbacks

Alarm rela

Equipment (ELB Repeater (RLB) Line (LLB)

Payload (PLB)

All loopbacks are accessible via the ASCII terminal.

Contacts Provided Configuration Contact Rating Closure Conditions

Controlled via ESF Data Link Controlled via ESF Data Link Controlled via in-band codes, or TABS or ANSI

T1.403 commands on the ES F Data Lin k Controlled vi a TABS or ANSI T1.403 commands on

the ESF Data Link

Normally open, nor m a lly closed and common lead Form C 1A at 52 Vdc or 2A at 26 Vdc, non-inductive SCC/CSU hardware failure

LOS from network or DS-1 e quipment Loss of synchronization from network Loss of synchronization from equipment Loopback in progr es s Loss of power Removal of CSU from shelf LOF Excessive BER Excessive BPV (>10

-4

)

Verilink APS 2000 User Manual -1

Test patterns

Timing and external

clocks

Environment

Interface modules

Dimensions

Outputs

Timing Mode Power Requirements

Inputs

Current Requirements

Operating Temperature Storage Temperature Humidity

SCC 212 TAC 2110

CSUs

CIMs

Quasi-random signal sequence (QRSS) 1-in-8 3-in-24 511

Through (recovered from input — both directions) +5.5 Vdc 1%; - 12.5 V

dc

±3%

900 mA at +5.5V; 30 mA at -12.5V (nominal)

32° F (0° C) to 122° F (50° C)

-4° F (-20° C) to 167° F (75° C) 5% to 95%, non-conde nsing

CIM 2022 APS (RJ-48C connectors) CIM 2010 APS (RJ-48C connectors)

8.1 in. (20.2 cm) high x 8.3 in. (21 cm) deep x 0.96 in. (2.5 cm) wide

8.5 in. (21.8 cm) high x 2.9 in. (7.5 cm) deep x 0.96 in. (2.5 cm) wide

Regulatory and technical

compliance

AT&T 54016 AT&T 62411 ANSI T1.403 FCC Part 68 UL 1459 Revision 2

System shelves and heat baffles

MLS 2200

(Multi-line shelf)

Height Width

Depth Weight Operating Temperature Storage Temperature Humidity Power Dis si pation Cooling Power supply inputs Regulatory And

Technical Compliance

8.75 in. (22.2 cm)

17.25 in. (44.2 cm) [19 in. or 23 in. with brackets]

10.50 in. (26.7 cm) 14 lb. (6.35 kg), empty 32° F (0° C) to 122° F (50° C) 14° F (-10° C) to 185° F (85° C) 5% to 95% relative humidity, non-condensing 34 W (116 BTU), fully equipped, maximum Free air circulation PAC 2910 or PDC 2920 — +5.5 Vdc and -12 Vdc UL 1459 Rev. 2, FCC Part 15 (Class A), FCC Part 68

-2 Verilink AP S 2000 User Manual

DLS 2100

(Dual-line shelf)

Height Width

Depth Weight Operating Temperature Storage Temperature Humidity Power Dis si pation Cooling Power Supply Inputs Regulatory And

Technical Compliance

1.75 in. (4.5 cm )

17.25 in. (44.2 cm) [19 in. or 23 in. with brackets]

12.00 in. (30.5 cm)

4.0 lb. (1.8 kg), empty 32° F (0° C) to 140° F (60° C) 14° F (-10° C) to 185° F (85° C) 5% to 95% relative humidity, non-condensing 10 W (34 BTU), fully equipped, maximum Free air circulation PWR 2940 — 5.5 V

dc

UL 1459 Rev. 2, FCC Part 15 (Class A), FCC Part 68, FCC Class B.

CHB 2900

(heat baffle)

Height Width

Depth

Figure 5-7 Dual-line Shelf Backplane Connectors

Back View of DLS 2001 and DLS 2100

S G N D

J1 J2

Power Supply A And B Input Jacks (6-pin Female)

1.75 in. (4.5 cm )

17.25 in. (44.2 cm) [19 in. or 23 in. with brackets]

12.00 in. (26.7 cm)

C

D

B

F

A

E

0

9

1

8

6

2

7

543

J4

J3

Data Bus Expansion Connectors (50-pin Male)

C G N D

Shelf Address Switch

Controller Bus Expansion Connectors (RJ-11)

Verilink APS 2000 User Manual -3

Figure 5-8 Multiline Shelf Backplane Connectors

Power Cord Exits From 115 Vac Power Supplies

PSA

BUS IN

J17

P2 P1

PSB

RS-485 Controller Bus Expansion Connectors (RJ-11)

BUS OUT

J16

SW1

TB1

PSA PSB

Power Supply Alarm Relay Contacts

Shelf Address Switch

DC Power And Ground Terminal Strip

Protective Cover

Data Bus Expansion Connectors (5 0-pin Male)

-4 Verilink AP S 2000 User Manual

Index

Numerics

1 in 8 test 5-7 24 Hour Bursty Errored Seconds 4-4 24 hour Errored Seconds 4-3 24 Hour Loss Of Frame Count 4-7 24 Hour Severely Errored Seconds 4-5 24 Hour Unavailable Seconds 4-6 3 in 24 test 5-7 62411 3-14 64K per DS0 3-13 96 fifteen minute intervals 4-3

A

AAUI-14 3-5 AIS 4-9, 5-13 AISS (alarm indication s i gnal second) 4-11 ALARM 5-5 Alarm indication signal state 4-9 Alarm processing

loss of frame and yellow alarm 5-12 Alarm reporting 3-15 Alarm Status 5-3 Alarm threshold 3-14 AMI or B8ZS 3-13 Answer 3-8 Answer Command 3-8 Answer Inactive Timeout 3-8 auto-answer string 3-8

B

B8ZS 3-14 BER 4-9 BERS (bit error rate alarm second) 4-11 BES 4-2 BES (bursty errored second) 4-10 bipolar violation (BPV) 4-8 Bit error rate 4-9 boot 3-6

C

Cable length option 3-14 canned config 3-14 Canned configuration 3-14 Class C address 3-5

clear cntr 5-6 community string - read 3-6 community string - write 3-6 configur ation 3-3 CRC ERRORS 5-5 CRC-6 error event 4-8 CSU loops 5-6

D

date 3-4 DBER (equipment bit error rate alarm second)

4-11 density enforcement 3-14 derives transmit clock 3-15 Diagnostic Commands 5-6 Diagnostics Me n u 5-4 dialing out to trap host 3-8 Dial-Out 3-8 Dial-Out Command 3-8 Dial-Out connect retries 3-8 Dial-Out Inactive timeout 3-8 Dial-Out Number 3-8 distance 3-14 diu clock 3-15 DIX 3-5 download

element download 3-6 Firmware upgrades 3-20 FTP file transfer 3-20 FTP server 3-20

DTED (equipment low-density second) 4-11

E

enable loops 5-6 end tests 5-6 Equipment errored second 4-11 equipment loopback 5-6 Equipment UAS, ES-L and OOFS 4-11 ES 4-2 ES (errored second) 4-10 ESF error event 4-10 ES-L (errored second - line) 4-10 Establish a loopback 5-3 Ethernet Configuration 3-5 Ethernet connector 3-5

Verilink APS 2000 User Ma nual

Index-1

Ethernet IP address 3-5 Ethernet transceiver 3-5 Ethernet Type 3-5 Ethernet/DIX 3-5 EXT 422 3-15 EXT CLK LOSS 5-6 EXT TTL 3-15

loss of all user data 4-7 Loss of frame alarm state 4-9 Loss Of Frame Count 4-2 Loss of signal stat e 4 -8 LOW DENSITY 5-5 Low density state on equipment side 4-8 low priority traffic 1-11

F

far element 3-3 FDL 3-15 flash bank to boot from 3-6 flash download 3-6 FOREVER 5-6 format 3-13 frame bit error event 4-8 FRAME LOSS 5-5 framed pattern of all ones 5-7 framing 3-13

G

Gateway IP address 3-5

H

Hangup 3-8 host configuration for Ethernet 3-5

I

inband down 5-7 inband up 5-7

J

Jitter Buffer 3-13

L

lbO 3-14 least serious 4-3 LEDs

for troubleshooting 5-1 Line build out 3-14 Line loopback 5-7 LOF 4-9 LOFC 4-2 LOFC (loss of frame count) 4-10 LOFS (loss-of-frame second) 4-11 log off 3-3 Loopbacks

for troubleshooting 5-1 loop-down code 5-7 loop-up code 5-7 LOS 4-8 LOSS (loss of signal second) 4-11

M

Main Menu Commands 3-3 Modem Configuration Commands 3-8 Modem Configuration Menu 3-6 Mux mode 3-13

N

NCC 2020

performance data processing 4-11 near element 3-3 network termination device 3-14 Node Administration 3-3 Node Administration Menu 3-4 node id 3-4

O

One Hour Network 4-2 ONE HOUR PERFORMANCE DATA 4-2 OOF 4-9 OOFS (out-of-f r am e se co n d) 4- 1 1 out-of-frame error event 4-8 Out-of-frame state 4-9

P

Payload loopback 5-7 Performance Response Messages 3-15 Phone number to call 3-8 privileged password 3-6 prm 3-15 PULSES 5-6

Q

QRSS test 5-6

R

RAIS (remote alarm indication second) 4-11 Rebooting an SCC 2020 3-4 regenerate CRC 3-13 repeater 5-6 reset alarm 5-6 reset com ports 3-6 Reset Registers 4-7 reset the test error counter 5-6 router 3-5

Index-2 Verilink APS 2000 User Manual

S

SEFS (severely errored framing second) 4-11 Sendto

new socket failed 3-4 SES 4-2 SES (severely errored second) 4-10 Set default commands 3-8 severely errored framing event 4-8 shelf/slot 3-3 show cntr 5-6 SIGNAL LOSS 5-5 Signal Loss 5-4 site name 3-5 Slip Configuration 3-5 SLIP Peer address 3-5 smart jack 3-14 SNMP community string 3-6 SNMP managers 3-6 Status Messages 5-5 Subnet Mask 3-5

T

T1 framing 3-13 TAC 2010

performance data processing 4-11 test error counter 5-6 Test signals

for troubleshooting 5-1 test time 5-6 THRU 3-15 time 3-4 Transcode Yellow Alarms 3-13 Transmit Clock 3-15 trap host ip address 3-6 trap hosts 3-6

U

UAS 4-2 UAS (unavailable second) 4-10 UASS (unavailable signal state) 4-10 Unavailable Seconds 4-6 unprivileged password 3-6

V

view alarm buffer 3-3

Y

Yellow alarm transcoding 5-13 yellow alarms 3-13

Verilink APS 2000 User Ma nual Index-3

Index-4 Verilink APS 2000 User Manual

Building tomorrow into today ’s networks

August 1999 P/N 880-502411-001-D

VERILINK Corporation

145 Baytech Drive

San Jose, CA, USA 95134

TEL: (408) 945-1199

FAX: (408) 262-6260

www.verilink.com

Verilink APS 2000-T1 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of Contents

Purpose and Use

Overview

Scope

Theory of Operation

Protection Groups

T1 Prioritization

Switching Criteria

V.54 Channel Loopback and Test

User Interfaces

System Hardware

MLS 2200 Shelf

Channel Service Units

Node Controller Functions

CSU Functions

Connector Interface Module

Controls and indicators

System Cabling Requirements

Required Cables

Cable Distance Limitations

Cable Schematics

CSU Configuration Options

Quick Setup

Installation Procedure

Step by Step

Connecting the CIMs

Configuration

Configuring the system

Important notes

Logging on

Node Administration

Node Administration Menu

Modem Configuration

Configuration Menu

Configuration Menu Commands

APS Control Modes

Switching Priority

Initializing the APS 2000

Initializing the system

Important Do’s and Don’ts

Firmware Upgrade Procedures

Upgrading SCC Modules

Upgrading Flashbank B

Element Download

Performance Menu

Performance Monitoring

Performance Menu Display

One Hour Network

24-hour Errored Seconds

24-Hour Bursty Errored Seconds

24-Hour Severely Errored Seconds

24-Hour Unavailable Seconds

24-Hour Loss of Frame Count

Reset Registers

Error Event Monitoring

Performance Data Registers

Performance data processing

Diagnostics

What tools are available

CSU LEDs

Using Diagnostics

Alarm Status

Diagnostics Menu

Status Messages

Diagnostic Commands

Signal Access Jacks

T1 and DSO Loopback and Test Functions

Local Loopbacks

Remote Loopbacks

CSU alarms

Loss of Signal

Out-of-frame and Loss of Signal

Loss-of-frame

AIS Alarm

Keep-alive Signal

Specifications