3Com S26x, S27x, S24x User Manual

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3Com

Corporation

PathBuilder™ S24x, 26x, and 27x Switch

Installation Manual

Notice

Restricted Rights Notification for U.S. Government Users

The software (including firmware) addressed in this manu al is provided to the U.S.

Government under agreement which grants the government the minimum “restricted rights” in the software, as defined in the Federal Acquisition Regulatio n (FAR) or the Defense Federal Acquisition Regulation Supplement (DFARS), whichever is applicable.

If the software is procured for use by the Department of Defense, the following legend applies:

Restricted Rights Legend

Use, duplication, or disclosure by the Government

is subject to restrictions as set forth in

subparagraph (c)(1)(ii) of the

Rights in Technical Data and Computer Software

clause at DFARS 252.227 -70 13 .

If the software is procured for use by any U.S. Government entity other than the Department of Defense, the following notice applies:

Notice

Notwithstanding any other lease or license agreement that may pertain to, or accompany the delivery of, this computer software, the rights of the Government regarding its use, repr odu cti o n, and disclos ure are as set forth in F A R 52.227 -19 (C ).

Unpublished - rights reserved under the copyright laws of the United States.

Notice (continued)

Proprietary Material

Information and software in this document are proprietary to 3C om (or its Suppliers) and without the express prior permission of an officer of 3Com, may not be copied, reproduced, disclosed to others, publi shed, or used, in whol e or in part , for any purpos e other t han that for which it is being made available. Use of software described in this document is subject to the terms and conditions of the 3Com Software License Agreement.

This document is for information purposes only and is subject to change without notice.

Part No. T0004, Rev. F First Printing October 1998

Manual is current for Release 5.2M.

Chapter 1. About the PathBuilder S24x, 26x, and 27x switch

Applications .................................................................................................. 1-3

Features and Protocols .................................................................................. 1-7

Hardware Components ................................................................................. 1-8

Enclosure .................................................................................................. 1-11

Motherboard ............................................................................................. 1-12

Back Panel ................................................................................................ 1-16

TI Dual Port Digital PBX Interface Card ................................................. 1-17

E1 Dual Port Digital PBX Interface Card ................................................ 1-20

DSPM/SM Card ....................................................................................... 1-23

DSPM Card with Analog E&M Interface ................................................ 1-26

Setting Jumpers for DSPM Card with Analog E&M Interface ................ 1-29

DSPM Card with FXS Analog Interface .................................................. 1-32

DSPM Host Card with FXO Analog Interface ........................................ 1-35

-48V Ringer/Power Supply Card and Enclosure ..................................... 1-38

10BaseT Transceiver ................................................................................ 1-41

Radio Frequency Interference Regulations .................................................. 1-42

Telecommunications Regulations ................................................................. 1-43

FCC and Telephone Company Procedures and Requirements ..................... 1-45

FCC Information .......................................................................................... 1-46

Chapter 2. Preparation and Unpacking

Before Installing Your PathBuilder S24x, 26x, and 27x Switch .................. 2-2

Unpacking ..................................................................................................... 2-4

The PathBuilder S24x, 26x, and 27x Switch Rackmount Kit ...................... 2-5

Installing the PathBuilder S24x, 26x, and 27x Switch in an Equipment Rack 2-8

Chapter 3. PathBuilder S24x, 26x, and 27x Switch Hardware Installation

Setting DIP Switches .................................................................................... 3-3

Installing the DSU DIM ............................................................................... 3-4

Configuring the PathBuilder S24x, 26x, and 27x Switch for DSU Operation 3-7

DSU Input and Output Signaling ................................................................. 3-8

Troubleshooting DSU Installation ................................................................ 3-11

Installing DIMs ............................................................................................. 3-12

Installing SIMMs .......................................................................................... 3-14

Installing I/O Cards ...................................................................................... 3-16

Installing a T1 or E1 Dual Port Digital PBX Interface Card ........................ 3-17

Installing the T1/CSU Daughter Card ...................................................... 3-19

Cabling the PathBuilder S24x, 26x, and 27x Switch ................................... 3-22

Installing the Transceiver ............................................................................. 3-23

Power-Up Diagnostics/Verification .............................................................. 3-24

Installing Software Options .......................................................................... 3-26

Full Mesh Cluster Cabling ............................................................................ 3-27

Contents (continued)

Chapter 4. Maintenance

Removing/Replacing Top Cover .................................................................. 4-3

Removing/Replacing Front Panel Cover ...................................................... 4-5

Removing/Replacing Power Supply ............................................................. 4-7

Removing/Replacing PathBuilder S24x, 26x, and 27x Switch Cards .......... 4-9

Replacing PathBuilder S24x, 26x, and 27x Switch Motherboard ................ 4-12

Removing/Replacing the Lithium Battery .................................................... 4-14

Chapter 5. Channelized Data

Application Example .................................................................................... 5-2

Configuring Channelized Data ..................................................................... 5-3

Configuring T1 and E1 Physical Ports ..................................................... 5-5

T1 Port Parameters .......................................................................... ......... 5-7

E1 Port Parameters .......................................................................... ......... 5-13

Configuring Virtual Ports on the PathBuilder S24x, 26x, and 27x Switch 5-18

Configuring Virtual Port Mapping Table ................................................. 5-20

Appendix A. Cables

Ethernet Cable Pinouts ................................................................................. A-6

Appendix B. PathBuilder S24x, 26x, and 27x Switch Specifications

Appendix C. PathBuilder S24x, 26x, and 27x Switch Error Codes

Appendix D. Technical Support

Index

About This Manual

Overview

Introduction This manual describes features, hardware, specifications, and applications for the

3Com PathBuilder S24x, 26x and 27x switch.

Audience This manual is intended for operators of the 3Com PathBuilder S24x, 26x and 27x

switch.

How to Use This Manual

The following table describes the contents of this manual.

This Chapter... Describes:

Chapter 1 PathBuilder S24x, 26x and 27x switch hardware and

software features, and FCC and Telephone Company procedures and requirements.

Chapter 2 Setting up a PathBuilder S24x, 26x and 27x switch,

including site preparation, how to unpack the unit, and installation procedures.

Chapter 3 Installing the hardware on the PathBuilder S24x, 26x

and 27x switch, powerup and verification, and installation of software options.

Chapter 4 Maintaining the PathBuilder S24x, 26x and 27x switch

including replacement of cards and motherboa rd.

Chapter 5 Channelized Data option for the PathBuilder S24x, 26x

and 27x switch. Appendix A Cable pinouts for Ethernet. Appendix B Product specifications. Appendix C Error Codes Appendix D Technical Support

Special Notices The following notices emphasize certain information in the manual. Each serves a

special purpose and is displayed in the format shown:

Caution

Caution provides you with information that, if not followed, can result in damage to software, hardware, or data.

Mise en Garde

Une mise en garde vous fournit des informations qui, si elles ne sont pas observées, peuvent se traduire par des dommages pour le logiciel, le matériel ou les données.

vii

About This Manual (continued)

Vorsicht

Ein Vorsichtshinweis macht Sie darauf aufmerksam, daß Nichtbefolgung zu Software-, Hardware- oder Datenschäden führen kann.

Warning

Warning is the most serious notice, indicating that you can be physically hurt.

Avertissement

Un avertissement constitue le message le plus sérieux, indiquant que vous pouvez subir des blessures corporelles.

Warnung

Eine Warnung ist der ernsthafteste Hinweis auf Körperverletzungsgefahr.

Trademarks PathBuilder is a trademark of 3Com Corporation.

viii

Overview

Chapter 1

About the PathBuilder S24x, 26x, and 27x switch

What is the PathBuilder S24x, 26x, and 27x switch?

The PathBuilder S24x, 26x, and 27x switch is a multi-protocol LAN/WAN PathBuilder S200 series switch featuring a high-speed processor and coprocessor coupled with 12 Mbytes of on-board memory (standard). Designed to address the needs of large branch offices with higher throughput needs and regional concentration sites, the PathBuilder S24x, 26x, and 27x switch is available in rackmount configurations.

The PathBuilder S24x, 26x, and 27x switch’s high performance capabilities are

uniquely matched to branch applications with high traffic requirements. As a regional concentr ator , the PathBuild er S24x, 26x, a nd 27x switch accepts t raffi c

from many branch loc ation s into a single site and tran sfers t he traf fic to ot her devi ces at the regional or central site.

The PathBuilder S24x, 26x, and 27x switch supports both Frame Relay and X.25.

About the PathBuilder S24x, 26x, and 27x switch 1-1

Meshed Cluster Application Support

A unique feature of the PathBuilder S24x, 26x, and 27x switch is its ability to support full meshed cluster applications. This functionality provides host site resiliency, port count extension, and multiple LAN connectivity.

Examples of how the featu res of th e PathBuild er S24x, 26x, a nd 27x swi tch f uncti on

in specific applications can be found the “Applications” section on page 1-3. Figure 1-1 shows a PathBuilder S24x, 26x, and 27x switch.

Figure 1-1. PathBuilder S24x, 26x, and 27x Switch

1-2 About the PathBuilder S24x, 26x, and 27x switch

Applications

Introduction This section br iefly describe s severa l appl icatio n examples for th e PathBuil der S24x,

26x, and 27x switch.

Performance Branch Nodes

Because of its high performance capabilities, the PathBuilder S24x, 26x, and 27x switch can be employed in a variety of branch node applications. For example, the PathBuilder S24x, 26x, and 27x switch can support a mix of voice and data types, traditional legacy (SDLC, X.25, Bisync, Async, etc.), and LAN. Because of its high throughput, the PathBuilder S24x, 26x, and 27x switch can be used in situations where large file transfers, fast response time, and high numbers of users are the norm. Figure 1-2 is an example of a typical branch node application.

Furthermore, the PathBuilder S24x, 26x, and 27x switch is designed to meet the needs of an expanding network. With its large RAM capacity and high-speed processor, the PathBuilder S24x, 26x, and 27x switch can easily adapt to a growing network with little or no additional hardware.

SNA

PB S200

Public

or Private

Network

Figure 1-2. Performance Branch Node Example

About the PathBuilder S24x, 26x, and 27x switch 1-3

Applications

Regional Concentrator

In Figure 1-3, the public network (Frame Relay/X.25) is performing the branch concentration function with the PathBuilder S24x, 26x, and 27x switch routing the traffic to the appropriate end point. In Figure 1-4, the PathBuilder S24x, 26x, and 27x switch acts as the regio nal conc ent rator s, rece iving t raf fi c from do zens and even thousands of remote sites, and concentrating the traffic before forwarding it to the correct location. In this case, the PathBuilder S24x, 26x, and 27x switch is the regional site.

In both examples, the PathBuil der S24x, 26x, and 27x swi tch could be eith er a single node or a group of nodes net worked togethe r as a cluste r . The PathBui lder S24x, 26x,

and 27x switch’s cluster feature is described below.

Central Site

Branch 1

PB S200

Frame Relay

or X.25

Branch XX

PB S200

(Single Node or Cluster)

PBX

Host

Figure 1-3. Regional Concentrator With Public Network Example

1-4 About the PathBuilder S24x, 26x, and 27x switch

High-Speed Link

Applications

Central Site

Branch 1

PB S200

Branch XX

PB S200

(Single Node or Cluster)

PBX

Host

Figure 1-4. Regional Concentrator Example

Cluster Application An important new feature available with the PathBuilder S24x, 26x, and 27x switch

is its use in a cluster. This allows as many as four PathBuilder S24x, 26x, and 27x switches to act a s ing le unit for the pu rpo ses of c onne ct ivi t y. Though configured and managed as individu al nodes, when t he Pat hBuilder S24x, 26x, and 27x swi tches are clustered toget her , devi ces at tached t o access po rts on one n ode can h ave calls routed out the network port of one of the other nodes.

The three high-speed ports on the PathBuilder S24x, 26x, and 27x switch motherboard provide networking channels between the nodes to pass traffic from network ports to access ports. The PathBuilder S24x, 26x, and 27x switch cluster allows for high port count and throughput primarily in support of the regional concentrator applications.

The example in Figure 1-5 is a full mesh cluster which means that any access link can reach any host connection. If a PathBuilder S24x, 26x, and 27x switch node within the cluster fails, only those links and host connections directly connected to that node go down. Placement of host equipment, and use of redundant host equipment can minimize the impact of any individual node failure. Furthermore, Link Back Up features in the remotes can limit the degree of remote isolation if part of the PathBuilder S24x, 26x, and 27x switch cluster fails.

About the PathBuilder S24x, 26x, and 27x switch 1-5

Applications

16 Access Ports

PB S200

16 Access Ports 16 Access Ports 16 Access Ports

PB S200

High-Speed Network Links to other Sites

or Backbone LAN Connectors

PB S200

Figure 1-5. PathBuilder S24x, 26x, and 27x Switch Cluster Example

1-6 About the PathBuilder S24x, 26x, and 27x switch

Features and Protocols

Description For a complete listing of the features and protocols supported by your PathBuilder

S24x, 26x, and 27x switch, refer to the Software Release Notice that came with the operating software.

About the PathBuilder S24x, 26x, and 27x switch 1-7

Hardware Components

PathBuilder S24x, 26x, and 27x Switch Hardware Configuration

SSN

Label

Front View

The PathBuilder S24x, 26x, and 27x switch comes in a rack-mountable configuration.

The switch contains a motherboard/CPU board, a built-in power supply, and an ISA bus for up to eight additional interface cards. The PathBuilder S24x, 26x, and 27x switch has three available serial ports, an Ethernet port, and a CTP port, FLASH memory, and battery-powere d conf iguration backup. It is eas ily expanded by adding option cards to the industry standard ISA bus.

Figure 1-6 shows a rack-mountable PathBuilder S24x, 26x, and 27x switch.

Status LEDs

POWER

STATUS

SERVICE

RESET

Reset

Button

Numeric

LED

PathBuilder

S200 Series

Rear View

Expansion Card Ports

Slots 1 through 8

Figure 1-6. PathBuilder S24x, 26x, and 27x Switch

Product ID

Label

AUI Port 4

(Ethernet Routing)

Serial/Network

I/O Ports 1, 2, 3, 6

Power

Supply

Product

ID Label

115/230 VAC

Voltage

Select

Switch

Optional -48V

Power Supply

1-8 About the PathBuilder S24x, 26x, and 27x switch

Hardware Components

This table lists and briefly describes the hardware components that make up the PathBuilder S24x, 26x, and 27x switch. More detailed descriptions of these components follow.

Component Description

Enclosure A rack-mount unit that contains all the PathBuilder S24x,

26x, and 27x switch processor cards.

Back Panel Contains power outlets, power switch, communication ports,

and slots for I/O cards.

Motherboard Contains five data ports:

• Ports 1 and 2 are DIM ports

• Port 3 is a high-speed/V.36 DTE port

• Port 4 is the Ethernet AUI port (see below for limitations)

• Port 6 is reserved for the control terminal port

Contains eight full-size expansion slots.

Integral DSU DIM (Optional)

An option used in installations requiring connection to a DDS interface conforming to AT&T 62310 or ANSI T1E1.4/91-006, and running at 56 kbps.

10Base2 Transceiver for AUI ports (optional)

Lets you accommodate different network configurations through th e user-selectable Signal Quality Error (SQE) function.

T1 Dual Port Digital PBX Interface Card PathBuilder S24x,

The T1 dual port digital PBX interface card supports digital voice communication s, pro viding integrated net w or k a cce ss. The T1 digital interfaces are used for both voice and data traffic.

26x, and 27x E1 Dual Port

Digital PBX Interface Card

The E1 dual port digital PBX interface card supports digital voice communications, providing integrated network access (see Figure 1- 12) .

The E1 interface card is used to support both voice and data traffic.

DSPM/SM The DSPM/SM card, used at nodes with digital PBX

interfaces, compresses four digital voice channels. It has no external I/O capabilities.

DSPM with FXS Analog Inte rface

The analog DSPM/FXS card allows the PathBuilder S24x switch to support up to t wo voice/fax c hannels per c ard. Each DSPM/FXS card occupies one ISA slot in the PathBuilder S24x switch.

DSPM with FXO Analog Inte rface

The analog FXO daughtercard (when mounted on the DSPM/HC) allows the PathBuilder S244 and S254 swi tch to support one voice/fax channel per card. Each DSPM/HX with FXO daughtercard combination occupies one ISA slot in the PathBuilder S244 and S254 switch.

About the PathBuilder S24x, 26x, and 27x switch 1-9

Hardware Components

Component Description (continued)

Ethernet Port 4 Limitations

DSPM with E&M Interface

The PathBuilder S26x switch Analog DSPM/E&M card allows the PathBuilder S26x switch to support up to two (2) voice/fax channels per card. Each E&M card occupies one ISA slot in the PathBuilder S26x switch. The Path Builder S26x switch E&M card supports both two- and four-wire interfaces.

Consider these limitations when using the Ethernet Port 4:

• The port does not support Bridging (refer to the Bridging Option, Part No. T0008-16). When configuring this port, you are not prompted for the bridge link number.

• The port does not support SLAC.

• When configuring the Ethe rnet Port 4, you are not prompted for the connector type. Ethernet Port 4 only supports AUI.

1-10 About the PathBuilder S24x, 26x, and 27x switch

Hardware Components

Enclosure

Introduction This section provides detailed information about the parts of the PathBuilder S24x,

26x, and 27x switch enclosure.

Front Panel The PathBuilder S24x, 26x, and 27x switch front panel (see Figure 1-6) has:

• Three status LEDs

• A 2-character numeric LED display

• A RESET switch

Status LEDs The three status LEDs are:

• Power (green) — When on, indi cates that p ower is on an d all DC vol tages ar e within specifications.

• Status (green) — When on, indicates that t he Pat hBui lde r S24x, 26x, and 27x switch node is executin g either a p ower-up d iagnostic o r a software downl oad. This LED is normally off.

• Service (yellow) — When on, indicates a hardware failure. This LED is normally off.

Numeric LED Display

Reset Switch The RESET switch resets the node. Pre ssing the RESET swit ch is the equi valent of a

Power Supply The power supply is mounte d at the top rear of the chassis. The AC switchable powe r

The 2-character numeric LED display provides system diagnostic codes. When the Service LED is on, a 2-digit code on the numeric LED display corresponds to a certain event.

power-up operation which clears all existing calls and brings down all links.

supply can operate at a nominal 110 or a nominal 230 Volts. For information about maintaining and replacing the power supply, refer to Chapter 4, Maintenance.

Note

For this unit, the -48VDC Power Option is also available.

About the PathBuilder S24x, 26x, and 27x switch 1-11

Hardware Components

Motherboard

Parts of the Motherboard

Etherspan

Port 1

Port 2

Port 3

AUI

Port 4

Port 6

This section describes some of the components that make up the PathBuilder S24x, 26x, and 27x switch motherboard. In addition, this section describes some of the daughtercards that can be found on the motherboard, shown in Figure 1-7.

Power Supply

Ringer Status

DRAM SIMM

Slots 1 and 2

1 2 3 4 5 6 7 8

Flash SIMM Slot Optional Flash

SIMM Slot CMEM SIMM Slot

Data Compression SIMM Slot

Global DRAM SIMM Slot

LED Connector

Port 1

DIMs

Port 2

Switch 2

Switch 1

Figure 1-7. Motherboard

RAM The PathBuilder S24x, 26x, and 27x swit ch comes standard with 16 Mbytes of loc al

DRAM for image execution and 8 Mbytes of global memory for buffer storage.

Ports There are four serial data port DB-25 connectors for network or access functions

(2.048 Mbps):

• Ports 1 and 2 (DB 25) are Data Interface Module (DIM) ports

• Port 3 (DB 25) is a V.36 DTE port

• Port 4 (DB 15) is an Ethernet AUI port

• Port 6 (DB25 ) is the Control Terminal Port (EIA232)

1-12 About the PathBuilder S24x, 26x, and 27x switch

Hardware Components

FLASH SIMM The FLASH Single In-line Memory Module (SIMM) holds a compressed image of

the operating software. This module is electrically erasable and reprogrammable. An optional FLASH SIMM can be i ns tal l ed f or bac kup. T hese modules are instal le d in one of the SIMM slots (1 or 2). Figure 1-8 shows the SIMM.

Figure 1-8. FLASH SIMM

Note

The chips on your SIMM may vary from the one shown inFigure 1-8.

CMEM SIMM The Configuration Memory Module ( CMEM) SIMM has 512 Kbytes o f memory and

provides the real time clock function. The CMEM is backed up by a lithium battery in case of a power disruption.

Each PathBuilder S24x, 26x, and 27x switch has a Software Serial Number (SSN) burned into a PROM located on the CMEM card. This SSN is used to verify the software options that are enabled for that node. It is on the CMEM SIMM card for easy removal and replacement in case of a motherboard failure.

The CMEM is installed in the SIMM slo t (see Figure 1-7 for slot lo cation). Figure 1-9 shows the CMEM.

Warning

Only qualified service personnel should perform the procedure described in this section. If the battery is installed incorrectly, it could explode after the PathBuilder S200 series switch product is powered up, damaging the unit.

Avertissement

Seules des personnes qualifiées peuvent mettre en pratique les procédures décrites dans cette section. Si la batterie n’est pas correctement installée, elle risque d’exploser après la mise en marche du produit PathBuilder S200 series switch et d’endommager l’unité.

Warnung

Die in diesem Abschnitt aufgeführten Vorgänge sollten ausschließlich von qualifiziertem Servicepersonal durchgeführt werden. Wenn die Batterie unsachgemäß installiert wird, kann sie nach dem Einschalten des PathBuilder S200 series switch-Produkts explodieren

About the PathBuilder S24x, 26x, and 27x switch 1-13

Hardware Components

Lithium Battery

Figure 1-9. CMEM SIMM

Expansion Port I/O Slots

Slot Number and Port Numbers

The PathBuilder S24x, 26x, and 27x switch motherboard has eight full-size expansion card slots (see Figure 1-6). Expansion I/O cards have I/O connectors that extend through the rear panel.

Port numbers for the ports o n the I/O cards h ave a fixed relationship to th e chassis expansion slot number. Six port numbers are reserved for each slot. If a slot contains an I/O card that does not support the full port count reserved for that slot, or the slot is empty, the extra port numbers remain unused.

This table shows the port numbers associated with each card type.

Slot Number Port Number Associated Card

Motherboard I/O 1-6 Motherboard 1 7-12 Voice cards (E & M, FXS, 2 13-18 3 19-24

Server Module, T1, E1). The T1/E1 is restricted to Slot 8.

4 25-30 5 31-36 6 37-42 7 43-48 8 49-54

Description of Serial/Network Ports

Ports 1 through 3 are con nect ed to t he mothe rboard with ri bbon cab les. Por ts 1 an d 2 are DIM ports and are functional only if a DIM is present. Port 3 is a dedicated V.36 DTE port.

Ports 1, 2, 3, and 6 on the r ear panel of the chassis are DB-25 femal e connect ors. Port 4, (the Ethernet AUI port) uses a DB-15 connector. Ports 1 and 2 may require adapters, depending on the DIM used. An adapter cable is available for Port 3.

1-14 About the PathBuilder S24x, 26x, and 27x switch

Hardware Components

How Ports Are Used

DIMs without a Cable Adapter

DIMs with a Cable Adapter

The following table describes how the ports are used.

Port Number Use

1, 2, and 3 Recommended for network port connection or cluster

connectivity. Ports 1 and 2 have variable interfaces, depending

on the DIMs. 4 Ethernet AUI port for routing applications. 6 Control Terminal Port (CTP). When operating as an

asynchronous interface, it can support data rates up to 115.2

kbps. Default CTP configuration parameters are 9600 baud,

8-bit characters, 1 stop bit, no parity. This is an EIA 232-D

DCE port using a DB-25 connector.

Ports 1 and 2 support a DSU DIM without the use of cable adapters.

If cable adapters are used, Ports 1 and 2 can support the following DIMs:

• High Speed (V.36)

• V.35

• V.11/ISO-4903

Each DIM port can be configured independently of the other port. For example, you can install: two V.35 DIMs; one V.35 DIM and one V.11 DIM; or two V.11 DIMs.

The cable adapter pinouts are described in Appendix A, Cables.

About the PathBuilder S24x, 26x, and 27x switch 1-15

Hardware Components

Back Panel

Back Panel Components

The components of the back panel are:

• Serial/Network I/O Ports. Ports 1, 2, 3, and 6 are DB-25 connectors. Port 4

is a DB 15 connector.

• AC Power Supply. The rear of the Power Supply has two (male and female)

power source connector s (one i s fo r connec tion to an AC sour ce and the othe r is an AC outlet) along with a selectable 115 VAC or 230 VAC switch. For most international usage, the switch must be set for 230 VAC.

• DC Power Supply. The uni t can be shi ppe d with the -4 8VDC Power Opti on.

The terminal block of the -48VDC has 5 screws. The two outermost screws are for attachment. The negative wire terminal is second from the left; the positive wire terminal is in the middle; the ground is second from the right.

• Expansion Card Ports. The expansion card ports differ depending on what

card is installed in that slot.

Figure 1-10 shows the PathBuilder S24x, 26x, and 27x switch back panel.

Optional -48V

Power Supply

Power

Supply

115/230 VAC Voltage Select

AUI Port 4

(Ethernet Routing)

Product

ID Label

Switch

Serial/Network I/O Ports 1,2, 3, 6

Expansion Card Ports Slots 1 through 8

Figure 1-10. PathBuilder S24x, 26x, and 27x Switch Back Panel

1-16 About the PathBuilder S24x, 26x, and 27x switch

Hardware Components

TI Dual Port Digital PBX Interface Card

Introduction The T1 dual port digital PBX interface card supports digital voice communications,

providing integrated network access. The T1 interface card is installed primarily in North America and Japan. A 2-megabyte T1 card is required for passing data and voice traffic.

SW1 DIP Switch Bank

MVIP Bus Interface Conn ector

ISA Bus Interface

87654321109

Port 49 LED

Run LED

Port 49 Interface

Port 50 Interface

Serial Diagnostic Port (Not Supporte d)

Pin 8

Port 50 LED SysFail LED

Pin 1

Figure 1-11. T1 Dual Port Digital PBX Interface Card

Description Each T1 dual port digit al PBX i nt erf ace card uses an Indust ry Standard Architec ture

(ISA) bus interface and a Multi-Vendor Integration Protocol (MVIP) bus interface. The MVIP bus interface provides multiplexed digital access within the PathBuilder S24x, 26x, and 27x switch chassis.

Function T1 dual port digital PBX interface ca r ds provide the digital interfaces for

connections to a PBX. The T1 dual port di gital PBX interfac e cards bring PCM voice and channel signaling into the node. The PCM voice data and voice signaling is routed to a DSPM/SM card over the MVIP bus for compression and transmission to the remote end.

About the PathBuilder S24x, 26x, and 27x switch 1-17

Hardware Components

Slot Restriction The T1 dual port digital PBX interface card occ upie s s lot 8 i n the Pat hBui lde r S2 4x,

26x, and 27x switch chassis.

DIP Switch Location

DIP Switch Settings

T1/CSU Daughter Card

The T1 dual port digital PBX in terface card contains a single DIP switch bank (SW1)

used to assign the card’s I/O base address.

Set the DIP switches on the T1 dual port digital PBX interface card as shown in Figure 1-11.

The T1/CSU Daughtercard provides a 1.544 MHz point-to-point interface for North American service that conforms to AT&T 62411/62421 standard. The card is FCC Part 68 Registered and uses eternal clocking derived from the telephone network.

One or two T1/CSU Daughter Car ds can be ins talled onto t he T1 Dual Por t card. T he top card supports port 49 and the bottom supports port 50.

For instructions for installing the T1/CSU card, refer to “Installing th e T1/CSU Daughter Card” section in Chapter 3.

Required Cables These cables ship with the T1 dual port digital PBX inter face card and ar e required to

cable the T1 dual port digital PBX interface card to the DSPM/SM cards in the node.

Cable Description Function

One 4-position 40-pin MVIP ribbon cable

Connects up to 3 DSPM/SM cards to interconnect digital voice traffic between individual cards in the same PathBuilder S24x, 26x, and 27x switch node.

One 8-position 40-pin MVIP ribbon cable

Connects 4 or more DSPM/SM car ds to in terconnec t digital voice traffic between individual cards in the same PathBuilder S24x, 26x, and 27x switch node.

Two 8-pin modular to DB15 cables

3-ft adapter converter cables used to convert the 8-pin modular connector on the front of the T1/E1 card to a DB15 connector (Product Code 17269).

1-18 About the PathBuilder S24x, 26x, and 27x switch

Hardware Components

LED Status Indicators

The T1 dual port digital PBX interface card contains four LEDs that can be viewed through the rear bracket.

LED Color LED is... ...Indicating

Port 49

Yellow

Port 50

Yellow

RUN

Green

SYSFAIL

Yellow

OFF ON

Normal operation Carrier failure on Port 49span

Normal operation Carrier failure on Port 50 span

Card failure Card Active

Normal operation Card failure

About the PathBuilder S24x, 26x, and 27x switch 1-19

Hardware Components

E1 Dual Port Digital PBX Interface Card

Introduction The E1 dual port digital PBX interface card supports digital voice communications,

providing integrated network access (see Figure 1-12). The E1 interface card is installed primarily in Europe and South America. A 2-megabyte E1 card is required for passing data traf f ic and voice tra ffic.

Description Each E1 dual port digit al PBX i nt erf ace card uses an Indust ry Standard Architec ture

(ISA) bus interface and a Multi-Vendor Integration Protocol (MVIP) bus interface. The MVIP bus inter face pro vides a multipl exed digit al acce ss within the Pa thBuilder S24x, 26x, and 27x switch chassis.

The E1 dual port digital PBX interface card has two E1 ports (CAS signaling only), handles E1 lines with or without CRC4, and supports 120Ω and 75Ω (with the addition of an optional cable). The interface type is 8-pin modular.

Function E1 dual port digital PBX interface ca r ds provide the digital interfaces for

connections to a PBX. The dual port digital PBX interface cards bring PCM voice and channel signaling into the node. The PCM voice data and voice signaling is routed to a DSPM/SM card over the MVIP bus for compression and transmission to the motherboard.

Slot Restriction The E1 dual port digital PBX interface card can only occ upy slot 8 in the PathBui lder

S24x, 26x, and 27x switch chassis.

1-20 About the PathBuilder S24x, 26x, and 27x switch

Hardware Components

E1 Dual Port Digital PBX Interface Card Illustration

Figure 1-12 shows an example of the E1 dual port digital PBX interface card.

87654321109

SW1 DIP Switch Bank

MVIP Bus Interface Conn ector

Port 49

Alarm LED

Run LED

Port 49 Interface

Port 50 Interface

Port 50 Alarm LED

SysFail LED

DIP Switch Location

DIP Switch Settings

ISA Bus Interface

Serial Diagnostic Port

Pin 6 Pin 1

Figure 1-12. E1 Digital PBX Interface Card

The E1 dual port digital PBX in terface card contains a single DIP switch bank (SW1)

used to assign the card’s I/O base address.

Set the switches as shown in Figure 1-12.

About the PathBuilder S24x, 26x, and 27x switch 1-21

Hardware Components

Required cables The following cables, includi ng two pi gt ai l cables, ship with the E1 dual port digi t al

PBX interface card and are required to cable the E1 card to the DSPM/SM cards in the PathBuilder S24x, 26x, and 27x switch node.

Cable Description Function

One 4-position 40-pin MVIP ribbon cable

Connects up to three DSPM/SM cards to interconnect digital voice traffic between individual cards in the same PathBuilder S24x, 26x, and 27x switch node.

LED Status Indicators

One 8-position, 40-pin MVIP ribbon cable

Connects four or more DSPM/SM cards to interconnect digital voice traffic between individual cards in the same PathBuilder S24x, 26x, and 27x switch node.

T wo 8-pin modular to DB15

For 120Ω connection.

cables T w o 8-p in modul ar to BNC

For 75Ω connection.

cables

The E1 dual port digital PBX interface card contains four LEDs that can be viewed through the rear bracket:

LED Color LED is... ...Indicating

Port 49 Ye llow OFF

Port 50 Ye llow OFF

RUN Green OFF

SYSFAIL Yellow OFF

Normal operation Carrier failure on Port 49 span

Normal operation Carrier failure on Port 50 span

Card failure Microprocessor Activity

Normal operation Card failure

1-22 About the PathBuilder S24x, 26x, and 27x switch

Hardware Components

Not

DSPM/SM Card

Introduction The Digital Signal Processing Module/Server Module (DSPM/SM) supports T1 or

E1 dual port digital PBX interface ca r ds.

Description The DSPM/SM card, used at nodes with digital PBX interfaces, compresses four

digital voice channels. It has no external I/O capabilities.

Function PCM voice and voice signaling, brought into the PathBuilder S24x, 26x, and 27x

switch node by the T1/E1 ca rds, is rout ed to a DSPM/SM ca rd over the MVIP b us for compression and transmission to the remote end.

When You Receive the Card

When you receive a DSPM/SM card, do the following:.

Step Action

1 Remove the card from the packing material. 2 Inventory the contents of the shipping container.

No cables are shipped with the DSPM/SM card. The appropriate Multi-Vendor Integration Protocol 40-pin ribbon cable and othe r cables ship with t he T1 or E1 dual port digita l interface cards.

3 Power off the PathBuilder S24x, 26x, and 27x switch node. 4 Install the card into the PathBuilder S24x, 26x, and 27x switch node. 5 Cable the card to the T1 or E1 dual port digital interface cards as

required.

About the PathBuilder S24x, 26x, and 27x switch 1-23

Hardware Components

DSPM/ SM Card Illustration

Figure 1-13 shows an example of the DSPM/SM card.

MVIP Bus Interface Connector

Installed

MVIP Clock Termination Jumpers

Not

Installed

Figure 1-13. DSPM/SM Card

Jumper Locations Figure 1-13 shows the location of jumpers on the DSPM/SM card that terminate the

Multi-Vendor Integration Protocol clock.

Installing Jumpers Figure 1-13 shows how to insta ll t he jumpers on the DSPM/ SM ca rd to te rminat e the

Multi-Vendor Integration Protocol clock. The DSPM/SM card with the jumpers set to the installed position must be located

furthest from the T1 or E1 card as shown in Figure 1-14 (the T1/E1 card is always

located in slot 8). All other DSPM/SM cards must have their jumpers in the “not installed” position.

1-24 About the PathBuilder S24x, 26x, and 27x switch

Hardware Components

Cables Required No cables ship with the DSPM/SM card; however, the DSPM/SM card must be

cabled to the T1 or E1 dual port digital interface using a Multi-Vendor Integration Protocol 40-pin ribbon cable, as Figure 1-14 shows.

To support 12 voice channels, for instance, you need three DSPM/Server Module cards.

Note: The DSPM/SM card with the jumpers set to the installed position must be located furthest away from the E1 or T1 card, the top card, as shown in this figure. ®

MVIP 4-Position Cable

DSPM/SM

T1 or E1

Restricted to Slot 8

Figure 1-14. Cabling T1/E1 Card to DSPM/SM Cards

About the PathBuilder S24x, 26x, and 27x switch 1-25

Hardware Components

Not

DSPM Card with Analog E&M Interface

Introduction The DSPM/E&M card supports two analog E&M interface voice channels.

Description The Analog DSPM/E&M card allows the PathBuilder S24x, 26x, and 27x switch to

support up to two (2) voice /fax channel s per card. Each E&M card o ccupie s one I SA slot in the PathBuilder S24x, 26x, and 27x switch. The PathBuilder S24x, 26x, and 27x switch E&M card supports both two- and four-wire interfaces.

Function The DSPM/E&M card allows a PBX to attach to one of its two connectors.

-48V Ringer/ Power Supply Card Required

Cables Required The DSPM/E&M interface card requires a -48V ringer/power supply cable to

When You Receive the Card

The DSPM/E&M card requires installation of a -48V ringer/power supply card and enclosure into the PathBuilder S24x, 26x, and 27x switch node to support interface types II, III, and V.

Interface type I does not require a -48V ringer/power supply.

support interface types II, III, and V. The -48V ringer/power supply cable connects up to six DSPM cards to the power

supply. The cable ships with the -48V ringer/power supply. For details on how to cabl e t he DSPM card to the -48V ringer/ powe r s uppl y, refer to

the “-48V Ringer/Power Supply Card and Enclosure” section on page 1-53.

When you receive a DSPM/E&M card, do the following:

Step Action

1 Remove it from the packing material. 2 Inventory the contents of the shipping container.

No cables ar e shipped with the DSPM/E&M ca rd. The appropriate 6-position power cabl e and stat us cable ship with the -48V ring er/power supply card that must be used in conjunction with the DSPM/E&M card.

3 Set jumpers as required. 4 Power off the node. 5 Install the card into the PathBuilder S24x, 26x, and 27x switch node. 6 Cable the card to the -48V ringer/power supply as required.

1-26 About the PathBuilder S24x, 26x, and 27x switch

Hardware Components

DSPM/E&M Card Illustration

Figure 1-15 shows an example of the DSPM card with an analog E&M interface.

MVIP Clock Termination Jumpers (Not Used)

2-or 4-wire Jum pe rs

Complex Impedance Jumpers

-48V Power Supply Connector

Port 1

Port 2

Port 1 RM

(Remote Busy)

Port 2 RM

(Remote Busy)

Figure 1-15. DSPM/E&M Card

Port 1 LC

(Local Busy)

Pin 8

Pin 1

Port 2 LC

(Local Busy)

About the PathBuilder S24x, 26x, and 27x switch 1-27

Hardware Components

LEDs The card contains four LEDs that can be viewed through the rear bracket.

LED Color LED is... ...Indicating

Port 1 Local Busy

Green On

Off

local physical connection is active (offhook)

local physical connection is idle (onhook)

Port 1 Remote Busy

Port 2 Local Busy

Port 2 Remote Busy

Green On

Off

Green On

Off

Green On

Off

remote end is active (offhook) remote end is idle (onhook)

local physical connection is active (offhook)

local physical connection is idle (onhook)

remote end is active (offhook) remote end is idle (onhook)

1-28 About the PathBuilder S24x, 26x, and 27x switch

Hardware Components

Setting Jumpers for DSPM Card with Analog E&M Interface

Introduction The DSPM/EM card has a total of 12 jumpers that you can set for various

applications if required:

• Ten jumpers for two- or four-wire operation

• Two jumpers for MVIP clock termination (not used at present)

Default Jumper Settings

Jumper Definitions Jumpers J11 through J15 are associated with Port 1.

The DSPM/EM card ships from the factory with the ten jumpers for two- or four-wire operation set to four-wire.

Jumper

4-Wire/600 2-Wire/600 2-Wire/UK

Number

J11 600 600 COM COM J124W2W2W2W J13 Don’t Care

(Default

Germany) J14 600 600 COM COM J15 4W (removed) 2W (installed) 2W (installed) 2W

Jumpers J21 through J25 are associated with Port 2.

Jumper

4-Wire/600 2-Wire/600 2-Wire/UK

Don’t Care (Default Germany)

Number

J21 600 600 COM COM

2-Wire/

Complex

Germany Complex

UK Germany

(installed)

2-Wire/

Complex

Germany Complex

J224W2W2W2W J23 Don’t Care

(Default

Germany) J24 600 600 COM COM J25 4W (removed) 2W (installed) 2W (installed) 2W

About the PathBuilder S24x, 26x, and 27x switch 1-29

Don’t Care (Default Germany)

UK Germany

(installed)

Hardware Components

Complex Impedance for UK and Germany

Setting jumpers for two-wire UK complex and two-wire Germany complex

impedance as noted in the “Jumper Definitions” section above, matches the impedance required in each country, respectively. Refer to Figure 1-15 and Figure 1-17.

370

620 .31µƒ

Figure 1-16. UK Complex Impedance

220

820

.115µƒ

Figure 1-17. Germany Complex Impedance

1-30 About the PathBuilder S24x, 26x, and 27x switch

Jumper Locations Set the jumpers to the positions as shown in Figure 1-18.

J15

J13

J21

4W 2W

J25

J22

C 6

J23

4W 2W

UG U G

J15

(Port 1)

J11

J12

C 6

Hardware Components

J144WJ24

C 6

Complex

Germany

(Port 1)

UK Complex

(Port 2)

2W 4W

Complex

Germany

J14

(Port 1)

J24

(Port 2)

COM 600Ω COM 600Ω

(Port 2)

UK Complex

J11

(Port 1)

J12

(Port 1)

COM 600Ω

(Port 2)

2W 4W

J25

(Port 2)

2W 4W

J13

J21

J22

COM 600Ω

J23

Figure 1-18. Jumper Locations for DSPM E&M Card

Installing Jumpers Figure 1-19 illustrates how to install two- or four-wire jumpers into proper position.

Installing 3 Position Jumpers

Jumpers

Installing 2 Position Jumpers

4-Wire (removed)

Jumpers

2-Wire

(installed)

Figure 1-19. Installing Jumpers

About the PathBuilder S24x, 26x, and 27x switch 1-31

Hardware Components

Not

DSPM Card with FXS Analog Interface

Introduction The Analog DSPM/FXS (Foreign Exchange Station) card supports two analog FXS

interfaces.

Description The analog DSPM/FXS card allows the PathBuilder S24x, 26x, and 27x switch to

support up to two voice/fax channels per card. Each DSPM/FXS card occupies one ISA slot in the PathBuilder S24x, 26x, and 27x switch.

Function The FXS interface provides a ringing voltage which alerts a station of an incoming

call’ s -48V to power the phone/fa x, and its -48V loo p current det ector to detec t when the station goes off hook. As a result, an analog DSPM card with an FXS interface allows a telephone set, fax machine, or telephone key set to attach to one of its two connectors.

When You Receive the Card

When you receive a DSPM/FXS card, do the following:.

Step Action

1 Remove the card from the packing material. 2 Inventory the contents of the shipping container.

No cables are shipped with the DSPM/FXS card. The appropriate 6-position power cabl e and stat us cable ship with the -48V ring er/power supply card that must be used in conjunction with the DSPM/FXS card.

3 Power off the PathBuilder S24x, 26x, and 27x switch node. 4 Install the card into the PathBuilder S24x, 26x, and 27x switch node. 5 Cable the card to the -48V ringer/power supply as required.

-48V Ringer/Power Supply Required

Cables Required The DSPM/FXS interface card requires a -4 8V ringer/power supply cable, whi ch can

The DSPM/FXS card requires installation of a -48V ringer/power supply card and enclosure into the PathBuilder S24x, 26x, and 27x switch node. Refer to the “-48V Ringer/Power Supply Card and Enclosure” section on page 1-38.

attach up to two DSPM/FXS cards to the power supply. The cable ships with the -48V ringer/power supply card and enclosure.

For details concerning how to install and cable the DSPM card to the -48V ringer/ power supply card and enclosure, refer to the “-48V Ringer/Power Supply Card and Enclosure” section on page 1-38.

1-32 About the PathBuilder S24x, 26x, and 27x switch

Hardware Components

DSPM/FXS Card Illustration

Figure 1-20 shows an example of the DSPM card with an analog FXS interface.

MVIP Clock Termination

Jumpers (Not Used)

-48V Power Supply Connector

Port 1

Port 2

Port 1 RM

(Remote Busy)

Port 2 RM

(Remote Busy)

Port 1 LC

(Local Busy)

Port 2 LC

(Local Busy)

Figure 1-20. DSPM Card with Analog FXS Interface

Pin 6

Pin 1

About the PathBuilder S24x, 26x, and 27x switch 1-33

Hardware Components

LEDs The card contains four LEDs that can be viewed through the rear bracket.

LED Color LED is... ...Indicating

Port 1 Local Busy

Green On

Off

local physical connection is active (offhook)

local physical connection is idle (onhook)

Port 1 Remote Busy

Port 2 Local Busy

Green On

Off

Green On

Off

remote end is active (offhook) remote end is idle (onhook)

local physical connection is active (offhook)

local physical connection is idle (onhook)

Port 2 Remote Busy

Green On

Off

remote end is active (offhook) remote end is idle (onhook)

Jumper Locations The DSPM/FX S interface card has no jumpers that must be set.

For Australian Users

Only 3Com approved engineering staff can install and program this card. The QDU rating for the voice compression algorithm used by this equipment is:

* 8k 4.5 QDU * 16k 2.63 QDU

The total number of QDU in any application must be managed according to the guidelines in the Private Network Design Guide published by Standards Australia.

Failure to adhere to these guidelines is a breach of Australian Communications Authority regulations.

1-34 About the PathBuilder S24x, 26x, and 27x switch

Hardware Components

Not

DSPM Host Card with FXO Analog Interface

Introduction The Analog DSPM/HC (host card) supports one analog FXO (Foreign Exchange

Office) interface. The FXO is a daughtercard that is mounted onto the DSPM/HC.

Description The analog FXO daughtercard (when mounted on the DSPM/HC) allows the

PathBuilder S24x, 26x, and 27x switch to support one voice/fax channel per card. Each DSPM/HX with FXO daughtercard combination occupies one ISA slot in the PathBuilder S24x, 26x, and 27x switch.

Function The FXO interface provides a method for connecting to the PBX, simulating a

phone. The FXO interface:

• has a ring voltage detector for detecting an incoming call

• can generate a loop closure for acknowledging an incoming call request

• can generate a call request to a PBX

When You Receive the Card

When you receive a DSPM/HC with FXO daughtercard, do the following:.

Step Action

1 Remove the card from the packing material. 2 Inventory the contents of the shipping container.

No cables are shipped with the DSPM/HC with FXO interface.

3 Power off the PathBuilder S24x, 26x, and 27x switch node. 4 Install the card into the PathBuilder S24x, 26x, and 27x switch node.

About the PathBuilder S24x, 26x, and 27x switch 1-35

Hardware Components

DSPM/HC with FXO Card Illustra ti o n

Figure 1-21 shows an example of the DSPM/HC with an analog FXO daughtercard.

FXO Daughtercard

Port 1

(Remote Busy)

Port 1

(Local Busy)

Port 2

(Remote Busy)

Port 2

(Local Busy)

Pin 6

Pin 1

Figure 1-21. DSPM/HC Card with Analog FXO Daughtercard

LEDs The card contains four LEDs that can be viewed through the rear bracket.

LED Color LED is... ...Indicating

Port 1 Local Busy

Port 1 Remote Busy

Port 2 Local Busy

Port 2 Remote Busy

Green On

Off

Green On

Off

Green On

Off

Green On

Off

local physical connection is active (offhook) local physical connection is idle (onhook)

remote end is active (offhook) remote end is idle (onhook)

local physical connection is active (offhook) local physical connection is idle (onhook)

remote end is active (offhook) remote end is idle (onhook)

1-36 About the PathBuilder S24x, 26x, and 27x switch

Hardware Components

Jumper Locations The DSPM/HC with FXO daughtercard has no jumpers that must be set.

About the PathBuilder S24x, 26x, and 27x switch 1-37

Hardware Components

-48V Ringer/Power Supply Card and Enclosure

Introduction One -48V ringer/power supply card and enclosure is required per PathBuilder S24x,

26x, and 27x switch node for

• Analog DSPM/FXS cards

• DSPM/E&M cards using interface signaling types II, III, and V.

DSPM/E&M card with an interface signaling of type I does not require a -48V ringer/power supply card and enclosure.

Description The -48V ringer/power supp ly card comes in a n enclos ure, which you must ins tall i n

the PathBuilder S24x, 26x, and 27x switch if you are field upgrading to support the Voice option.

New PathBuilder S24x, 26x, and 27x switch nodes ordered with the voice option ship with the -48V ringer/power supply factory installed.

The -48V ringer/power supply card supports the following:

• 12 E&M ports, or 6 DSPM/E&M cards

• 4 FXS ports, or 2 DSPM/FXS cards

Function The -48V ringer/power supply card rings up to four phones at a time.

-48V Ring/Power Supply Types

Jumper Definitions The -48V ringer/ power s upply c ard ha s two se ts of jumpers for v arious requi reme nts.

Jumper Locations The jumpers for 25 or 50 Hz ring frequency are located on the -48V ringer/power

Installing Jumpers Figure 1-22 and Figure 1-23 show jumper positions on the -48V r inger/p ower suppl y

There are two versions of the -48V ringer/power supply: Standard and Enhanced.

• The Standard -48V ringer/power supply (see Figure 1-22) can support two FXS cards.

• The Enhanced -48V ringer/power supply (see Figure 1-23) can support six FXS cards. (Available in the Fall of 1998.)

• One set of jumpers to enable or disable the -48V ringer supply output (should not be changed from its default setting of enabled.)

• One set of jumpers to control the frequency of the ring supplied to the DSPM/ FXS card: 25 Hz (US) or 50 Hz (Europe).

For more information see Figure 1-22 and Figure 1-23.

supply card as shown in Figure 1-22 and Figure 1-23.

card for 25 or 50 Hz ring frequency and how to install the jumpers for 25 or 50 Hz ring frequency.

1-38 About the PathBuilder S24x, 26x, and 27x switch

Hardware Components

Cables Required The -48V ringer/power supply card is shipped with one cable with six connectors.

-48V Power Supply Connector (to each DSPM card)

Ring Enable Jumper

Must be Configured

as Shown

Jumper Set

for 25 Hz

Ring Frequency

Power Connectors to

Jumper Set for 50 Hz Ring Frequency

Main AC Power Supply

Status Connector

Figure 1-22. Standard -48V RInger/Power Supply Card and Enclosure

About the PathBuilder S24x, 26x, and 27x switch 1-39

Hardware Components

Ring Enable Jumper

Must be Configured

as Shown

J11 Jumper Set for 25 Hz

Ring Frequency

J11 Jumper Set for 25 Hz

Ring Frequency

J12

J11

Jumper Locations

Output Connectors

Power Connectors to

Main AC Power Supply

Status Connector

Figure 1-23. Enhanced -48V RInger/Power Supply Card and Enclosure

1-40 About the PathBuilder S24x, 26x, and 27x switch

Hardware Components

10BaseT Transceiver

Description This transceive r is desig ned to pr ovide Ethern et 10base T suppor t fo r the Pa thBuil der

S24x, 26x, and 27x switch. It can accommodate different 10BaseT configurations through the user-selectable Signal Quality Error (SQE) function. See Figure 1-24. Some network devices do not recognize this signal. If the attached network device does not recognize this SQE signal, set the switch to Off.

RJ45 Connector

SQUE Switch

15-Pin D-Type Connector

Figure 1-24. 10BaseT Transceiver

The 10BaseTransceiver can be connected to the Ethernet LAN (ELAN) card or the

PathBuilder S24x, 26x, and 27x switch’s Port 4.

About the PathBuilder S24x, 26x, and 27x switch 1-41

Radio Frequency Interference Regulations

Introduction This section explains the radio frequency interference regulations.

FCC This equipment has been tested and found to comply with the limits for a Class A

digital device, pursuant to Part 15 of the FCC rules, CISPR Publication 22:85 and EN 55022:87. These limits are designed to provide reasonable protection against interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy, and, if not installed and us ed in a ccorda nce with t he ins tru ctio n manual, may c aus e inte rfer ence to radio communications.

Changes or modifications not expressly approved by 3Com could void the user’s

authority to operate the equipment.

Canadian DOC 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.

Operation of this equipment in a residential area is likely to cause interference, in which case the user will be required to take adequate measures to correct the interference at his/her own expense.

General This product was verified under test conditions that include some use of shielded

DTE cable(s). Use o f dif ferent cables will invalid ate verif ication and in crease the risk of causing interference to radio and TV reception.

You can obtain the proper cables from 3Com.

1-42 About the PathBuilder S24x, 26x, and 27x switch

Telecommunications Regulations

In the United States, FCC rules Part 68 require that the followi ng user instru ctions are provided:

The telephone company has the right to ask you for registration information about your equipment that is connected to the telephone line. When requested, you

should provide your equipment’s FCC registration number and ringer equivalence number (REN), if applicable.

The user instructions shall include the FCC registration number and a detailed list of all ports that connect to the network. The information provided must also include USOC connector jacks, the facility interface codes (FOC), service order codes, (SOCs), and REN, as applicable.

REN is used to determine t he number of devices t hat can be connected to an anal og telephone line, but is generally not applicable to digital service equipment. Excessive RENs on the line may result in t he devices’ not ri nging in respo nse to an incoming call. Contact the telephone company to determine the maximum REN sum for the calling area; in general, it should not exceed five.

The telephone company may change its equipment, operations, or procedures. If these changes affect your equipment or service, the telephone company will provide written notice so you may make the necessary changes with uninterrupted service.

FCC regulations and telephone company procedures prohibit connection of customer-pro vided equipment to t elephone company-p rovided coin servi ce (central office-implemented systems). Connection to party lines is subject to state tariffs.

Contact your telephone company if you have any questions about your telephone line.

Telecommunications Regulations

About the PathBuilder S24x, 26x, and 27x switch 1-43

Telecommunications Regulations

In Canada, the following equipment attachment limitations and information must be provided in the user instructions:

The Canadian Department of Communicati ons label identifie s certi fied equipment . This certification means that the equipment meets certain telecommunications network protective operational and safety requirements. The Department does not guarantee the equipme nt will opera te 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 i nstalled u sing a n accepta ble method of connect ion. In some cases, 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 facil ity de signa ted by the suppl ier. Any repairs or alterati ons 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 th eir own pro tec tion th at the el ectr ical gr ound co nnecti ons 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

Users should not atte mpt to make such c onnection thems elves, but sh ould contact t he appropriate electric inspection authority, or electrician, as appropriate.

Mise en Garde

Les utilisateurs ne doivent pas établir de telles connexions eux-mêmes. Ils doivent contacter une personne compétente ou un électricien.

Warnung

Benutzer sollten nicht versuchen, diese Verbindung selbst herzustellen, sondern dazu die zuständige Aufsichtsbehörde für Elektroinstallationen bzw. einen Elektroin stallateur kontaktieren.

Note

The Load Number (LN) assigned to each terminal device denotes the total load percentage to be connected to a telephone loop used by the device to prevent overloading. The loop termination can consist of any combination of devices as long as their total LNs do not exceed 100.

1-44 About the PathBuilder S24x, 26x, and 27x switch

FCC and Telephone Company Procedures and Requirements

FCC and T elephone Company Procedures and Requirements

Introduction The following tables provide the information that is needed for ordering telephone

company network connections for the 3Com PathBuilder S24x, 26x, and 27x switch V.22 bis modem.

How to Order Connections in the U.S.A.

Ordering Connections for the T1/CSU

Service

Description

PSTN-permissive RJ11C 0.8B 02LS2

Service

Description

PSTN- permissive CA11A 15 LS

To order the proper connections for a PathBuilder S24x, 26x, and 27x switch with a T1 Dual Port Interface card with T1/CSU daughtercards, provide the telephone company with the following information:

• Interface type

• Required USOC jack connector number

• Service code

• Facility interface codes

Interface Type USOC Jack

56-kbps di gital interface RJ48 6.0P 04DU9-BN 56-kbps di gital interface RJ48 6.0P 04DU9-1Z N 56-kbps di gital interface RJ48 6.0P 04DU9-1KN 56-kbps di gital interface RJ48 6.0P 04DU9-1S N

USOC Jack

REN Facility Interface

Connector

How to Order Connections in Canada

Connection

LN Network

Arrangement

Connector

Service

Code

Facility Interface

Code

Interface

Code

If Problems Arise If a ny of yo ur tel ephone equipmen t is n ot oper atin g corr ectly, immediately remove it

from the telephone line before it harms your network. If the telephone company notes the problem, they will notify you in advance, if possible, and may temporarily disconnect your service. When you are notified, you will be given the chance to correct the problem and be informed of your right to file a complaint with the FCC.

About the PathBuilder S24x, 26x, and 27x switch 1-45

FCC Information

Customer-Provided Telephone Equipment

FCC and T elephone Company Procedures and Requirements

FCC regulations and telephone company procedures prohibit connection of customer-provided equipment to telephone company-provided coin service (central office-implemented systems). Connection to party lines is subject to state tariffs.

Occasionally, the telephone company may make changes in their equipment, operations, or procedures. If these changes affect your equipment or service, the telephone company will provide written notice so you can make the necessary changes to maintain uninterrupted service.

Contact your telephone company if you have any questions about your telephone line.

In some circumstances, the telephone company may ask you for information about your equipment that is connected to the telephone line. Within the United States

(at the request of the telephone company), you should provide your equipment’s FCC registration number. This number is AT9USA-21085-DD-N and is located on the unit’s label.

Before you connect the PathBuilder S24x, 26x, and 27x switch DSU option to the network, you must provide the telephone company with the information shown below.

Type of Interface USOC Jack

Connector

REN/Service

Code

Facility Interface

Code

56-kbps digital interface RJ48S 6.0F 04DU5-56

1-46 About the PathBuilder S24x, 26x, and 27x switch

FCC Information

Regulations Concerning Electromagnetic Radiation

The Federal Communications Commission (FCC) of the United States of America and the Industry and Science Canada (ISC) have published regulations that govern the allowable limits of emanation of radio frequency energy of computing devices and associated peripherals. These regulations are concerned with interference to radio communications, such as radio and television. The regulations require equipment for use in the United States or Canada to be labeled and to be accompanied by the following notice:

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protecti on against interfe rence when equ ipment i s operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause interference to radio communi cat io ns.

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 ISC.

Operation of this equipment in a residential area is likely to cause interference in which case the user will be required to take adequate measures to correct the interference.

This product was verified under test conditions that include use of shielded DTE cable(s). Leased line cab les with 1.5 turns through a ferrit e cylinder were also used. Use of different cables will invalidate verification and increase the risk of causing interference to radio and TV reception.

You can obtain the proper cables from 3Com.

Correcting Interference

Additional Information

If this equipment causes interference to radio or television reception, which can be determined by t urning the eq uip ment of f and on, you a re encoura ged to tr y to co rrect the interference by one or more of the follo wing measures :

• Reorienting the receiving antenna

• Relocating the equipment with respect to the receiver

• Moving the equipment away from the receiver

• Plugging the equipment into a different outlet so that the equipment and receiver are on different circuits

If necessary, you should consult the dealer or an experienced radio/television technician for additional circuits.

You may find the following booklet prepared by the FCC helpful: How to Identify and Resolve Radio-TV Interference Problems. This booklet is available from the U.S. Government Printing Office, Washington, D.C. 20402, Stock No. 004-000-00345-4.

About the PathBuilder S24x, 26x, and 27x switch 1-47

FCC Information

1-48 About the PathBuilder S24x, 26x, and 27x switch

Chapter 2

Preparation and Unpacking

Overview

Introduction This chapter summarizes information you need and activities you must complete

before installing your PathBuilder S24x, 26x, and 27x switch system. It describes how to select an operating environment and how to unpack the

enclosure.

Preparation and Unpacking 2-1

Before Installing Your PathBuilder S24x, 26x, and 27x Switch

Introduction Before installing your PathBuilder S24x, 26x, and 27x switch, be sure to complete

the followin g steps:

• Verify that the configuration worksheets are accurate and complete. Be sure that they are prepared beforehand according to your network requirements.

• Be sure you have all the required information from your service provider.

• Configure, connect, and test the network termination unit (for example, a CSU) through which the PathBuilder S24x, 26x, and 27x switch connects to the networ k.

Selecting an Operating Environment

Choose a site for your PathBuilder S24x, 26x, and 27x switch that is within 6 feet (1.8m) of an appropriate power source. Depending on your application and the country in which the PathBuilder S24x, 26x, and 27x switch will operate, this may be a grounded 115 or 230 VAC outlet.

Caution

The voltage select switch on the back of the power supply must be set for 230 VAC for use where applicable.

The area selected should be free of accumulated dust and environmental extremes. The acceptable temperature range for operating the unit is 32× to 122×F (0× to 50×C) at sea level. Relative humidity should not exceed 90% (noncondensing).

Allow at least 12 inches (30.5 cm) in back of the unit for cable clearance and air circulation.

Mise en Garde

Le commutateur de sélection de tension à l’arrière du bloc d’alimentation doit être sur la position 230 VAC (tension courant alternatif) pour une utilisation appropriée.

Choisissez un emplacement propre et sûr, dont la température se situe entre 0 et 50 degrés Celsius (32 et 122 degrés Fahrenheit ) au niveau de la mer. L’humidité ne doit pas excéder 90% (sans condensation).

Laissez un espace d’au moins 30,5 cm (12 pouces) derrière l’unité pour les câbles et la circulation de l’air.

Vorsicht

Der Spannungsumschalter auf der Rückseite des Netzteils muß für die entsprechenden Länder auf 230 VAC eingestellt sein.

Der Betriebsort sollte staubfrei und keinen extremen Umwelteinflüssen ausgesetzt sein. Der akzeptabl e Temperaturbereich für den Be tr ieb des Geräte s lie gt z wische n 0 und 50 Grad Celci us auf Meer eshöhe. Die r el ativ e Luft fe uchti gkeit soll te 90 % ( nicht kondensierend) nicht übersteigen.

Halten Sie einen Wandabstand von mindestens 30,5 cm auf der Geräterückseite zur ungehinderten Verlegung der Kabel und Entlüftung ein.

2-2 Preparation and Unpacking

Before Installing Your PathBuilder S24x, 26x, and 27x Switch

Caution

To avoid overheating the unit’s circuitry, you should never place anything on top of the unit, within one inch (2 .5 cm) of the venti lation s lots on the fron t panel, or wit hin 12 inches (30.5 cm) of the back of the unit.

Mise en Garde

Afin d’éviter tou te surchauf fe des cir cuits de l’u nité, ne place z aucun obje t sur l’unit é à moins de 2,5 cm (1 pouce) des conduit s de venti lati on du panne au avant et à moins de 30,5 cm (12 pouces) de l’arrière de l’unité.

Vorsicht

Zur Vermeidung einer Überhitzung der Geräteschaltkreise sollten Sie keine Gegenstände auf dem Gerät plazieren. Zu den Entlüftungsöffnungen der Vorderabdeckung sollte ein Abstand von 2,5 cm und zur Rückseite des Gerätes von 30,5 cm eingehalten werden.

Preparation and Unpacking 2-3

Unpacking

Introduction The PathBuilder S24x, 26x, an d 27x swit ch’s printed circuit cards and other internal

components are in st alled in the enc lo sure before the uni t is shipped fr om t he factory. In addition to the enclosure and its components, you may find within the shipping carton a sleeve containing the power cord (if appropriate for your installation).

Checking the Equipment

Thoroughly check the cartons and their contents for damage in shipment. If damage has occurred, contact the shipping agent.

Next, lift the unit from the shipping carton and remove the foam packing material. Direct any questions about missing parts to your 3Com representative.

2-4 Preparation and Unpacking

The PathBuilder S24x, 26x, and 27x Switch Rackmount Kit

Introduction You can install the PathBuilder S24x, 26x, and 27x switch in a standard Electronics

Industry Association (EIA) 19-inch equipment rack.

EIA Rackmount Kit The PathBuilder S24x, 26x, and 27x switch EIA Rackmount kit contains the

following components:

• One Mounting Shelf

• Two adjustable Rear Mounting brackets for rear rail attachment

• Four Phillips-head 10-32 x .38 long screws with integral lock washers

• Eight Phillips-head 12-24 x.50 long screws for front and rear rail attachment

• Three longer #6 screws

When Checking the EIA Rackmount Kit

Be aware of the following issues when checking the components of your rackmount kit:

• The Mounting Shelf and adjustable Rear Mounting brackets ship fastened together at the Mounting bracket’s front-most adjustment hole. This prevents damage during shipping. Disassemble these components prior to installation.

• The four Phillips-head 10-32 x .38 long screws ship in holes securing the Mounting Shelf to the Rear Mounting brackets. Remove them to separate the shelf and brackets.

• The eight Phillips-head 12-24 x .50 long screws ship in a small plastic bag.

Preparation and Unpacking 2-5

The PathBuilder S24x, 26x, and 27x Switch Rackmount Kit

Rackmount Kit Parts

Figure 2-1 shows the components of the rackmount kit.

10-32 x .38 Screws with Exte rnal Lock Washers (4)

Mounting Shelf

Adjustable Rear Mounting Bracket (2)

Placement Considerations

Figure 2-1. The PathBuilder S24x, 26x, and 27x Switch Rackmount Kit

Consider the following issues when installing your PathBuilder S24x, 26x, and 27x switch in an equipment rack:

Space

A PathBuilder S24x, 26x, and 27x switch and EIA rackmount ass embly occupi es 7.0 inches, or 4 U NEMA rack space increments.

Power

Allow enough room behind the EIA equipment rack to connect the power cord and devices. Refer to this manual for maximum power load, when connecting to a 15 amp internal convenience power outlet strip.

Thermal

For proper ventilation, do not cover air vents at the rear of the unit. Where a front door is present on a rackmount cabinet, installation of the PathBuilder S24x, 26x, and 27x switch must allow a 2-inch clearance between the door and the PathBuilder S24x, 26x, and 27x switch air inlet to provide sufficient air flow.

Stability

When installing the PathBuilde r S24x, 26x, and 27 x switch in a non- 3Com cabinet or

with other vendors’ eq uipment, the PathBui lder S24x, 26 x, and 27x swit ch should b e positioned so that the resulting system rack remains stable during installation on a 10-degree ramp or when 56 pounds of force is applied to the top of the cabinet.

2-6 Preparation and Unpacking

The PathBuilder S24x, 26x, and 27x Switch Rackmount Kit

Preparation and Unpacking 2-7

Installing the PathBuilder S24x, 26x, and 27x Switch in an Equipment Rack

How to... Follow these steps to install the PathBuilder S24x, 26x, and 27x switch in an

equipment rack:

Step Action Description

1 Remove the plastic pedestal base

that is attached to the PathBuilder S24x, 26x, and 27x switch.

2 Insert the Mounting Shelf to the

desired location in the equipment rack and secure it to the fr ont using four 12-24 x .50 long screws.

The base is attached by four Phillips-head screws coming up from the bottom, as shown in Figure 2-2.

See Figure 2-3, A.

3 Fasten the adjustable R ear

Mounting brackets at each side of the rear of the equipment ra ck. Use the remaining four 12- 24 x.50 long screws.

4 Bolt the Moun ting Shelf to th e

Rear Mounting brackets using the four 10-32 x .38 long screws, two to each side.

To do this, insert the screws from inside the equipment rack, through the Mounting Shelf slot, and through the appropriat e adjustment hole in the Rear Mounting bracket.

5 Facing the front panel, car efully tip

the PathBuilder S24x, 26x, and 27x switch horizontally to your right. Insert the PathBuilder S24x, 26x, and 27x switch into the equipment rack, leaving enough room at the rear to remove the three casefastening screws along the new

“bottom” of the unit.

See Figure 2-3, B. When installed correctly, the Rear

Mounting brackets are on the outside of the mounting shelf.

See Figure 2-3, C.

See Figure 2-4.

2-8 Preparation and Unpacking

Installing the PathBuilder S24x, 26x, and 27x Switch in an Equipment Rack

Not

Step Action Description

6 Remove the long (#6) screws.

Then, slide the PathBuilder S24x, 26x, and 27x switch flush against the rear flange of the Mounting Shelf and r einsert the screws through the flange and into the

unit’s case.

The PathBuilder S24x, 26x, and 27x switch is now securely attached to the e quipment rack and ready for connection t o devices and power.

The unit is now accessible mainly from the front and will require complete removal from the r ack to perform maintenance routines.

Preparation and Unpacking 2-9

Installing the PathBuilder S24x, 26x, and 27x Switch in an Equipment Rack

Removing the Pedestal Base

Figure 2-2 shows how to remove the pedestal base from the PathBuilder S24x, 26x, and 27x switch.

Remove the pedestal base by removing the four Phillips-head screws from the bottom.

Figure 2-2. Pedestal Base Removal of the 27x Switch

PathBuilder S24x, 26x, and

2-10 Preparation and Unpacking

Installing the PathBuilder S24x, 26x, and 27x Switch in an Equipment Rack

Steps for Rackmount Assembly

Bolt the Mounting Shelf to the Rear Mou nt i ng

Brackets using the four 10-32 x .38 screws supplied with the kit. Do this by inserting the screws from inside the rack, through the Mounting Shelf slot, and through the appropriate hole in the Rear Mounting bracket.

Figure 2-3 shows the steps for rackmount assembly.

Equipment Rack Rail

Adjustable Rear Mounting bracket

10-32 x .38 Screws

Fasten the adjustable Rear Mounting brackets

to each side of the equipment rack us ing four 12-24 x .50 screws.

Figure 2-3. PathBuilder S24x, 26x, and 27x Switch Rackmount Assembly

Mounting Shelf

Insert the Mounting Shelf in the desired location and secure it to the front ra il using four 12-24 x .50 screws supplied with your equipment rack.

Preparation and Unpacking 2-11

Installing the PathBuilder S24x, 26x, and 27x Switch in an Equipment Rack

Installing the PathBuilder S24x, 26x, and 27x Switch

Figure 2-4 shows the install ation of the P athBuil der S24x, 26x , and 27x swit ch in the rackmount assembly.

PathBuilder S24x, 26x, and 27x switch

(Rear V iew)

Note:

Attached Rear Mounting brackets are not shown in this figure.

Figure 2-4. Installing the Pat hBuilder S24x, 26x, and 27x Switch in Rack mount Assembly

Mounting Shelf

Remove the three case-fastening screws

off the left rear (new bottom) of PathBuilder S24x, 26x, and 27x switch.

Slide the PathBuilder S24x, 26x, and 27x

switch flush against rear mounting rail and reinsert long screws through rail and into machine’s case.

2-12 Preparation and Unpacking

Chapter 3

PathBuilder S24x, 26x, and 27x Switch Hardware

Installation

Overview

Introduction This chapter contains procedures for installing PathBuilder S24x, 26x, and 27x

switch hardware components. The following warnings and cautions apply to all procedures described in this

chapter:

Caution

Ports that are capable of connecting to other apparatus are defined as Safe Extra Load Voltage (SELV). To ensure conformity with EN60950, ensure that these ports are only connected to ports of the same type of apparatus.

Mise en Garde

Les ports qui sont susceptibles d’être connectés à des équipements sont désignés comme TBTS. Pour garantir l a conformit é à la no rme EN 6095 0, n’inter connecte ces ports qu’avec des ports du même type sur des autres matériels.

Vorsicht

Anschlusse, die mit anderen Geräten verbindet werden können, sind als SELV beschrieben. Um Konformit ät mit EN 60950 z u ve rsic hern, s icher n Sie e s, daB diese Anschlusse nur mit den des selben Type auf anderen Geräten verbindet werden.

Caution

The socket-outle t shal l be installed nea r the equipment and shall be easi l y accessible.

Mise en Garde

Pour mettre hors t ension l’app ar eil de branch er la pri se él ectr ique. La prise él ectr ique doit être située a proximité de l’équipement et elle doit être d’accès facile.

Vorsicht

Die Steckdose soll nahliegend der Einrichtung installiert werden und leicht erreichbar sein.

Warning

Only qualified service personnel should perform the procedure described in this section. Use of this procedure by unqualified personnel could result in personal injury or equipment damage, and could jeopardize your warranty and maintenance agreement.

PathBuilder S24x, 26x, and 27x Switch Hardware Installation 3-1

Avertissement

Seules des personnes qualifiées peuvent mettre en pratique les procédures décrites dans cette section. Dans le cas contraire, des risques de blessures ou d’endommagement du matériel sont possibles, ce qui pourrait annuler votre garantie et votre contrat de maintenance.

Warnung

Die in diesem Abschnit aufgeführten Vorgänge sollten ausschließlich von geschultem und qualifiziertem Servicepersonal durchgeführt werden. Wenn diese Vorgänge von unqualifiziertem Personal durchgeführt werden, kann dies zu Personenschäden oder einer Beschädigung des Gerätes führen und darüber hinaus Ihren Anspruch auf Garantieleistung und Kundendienst gefährden.

Caution

Some components used in the PathBu ilder S24x , 26x, and 27x switch ar e sensit ive to static electric discharges; static electric discharges can ca use damage to internal components. Use proper handling and grounding precautions whenever handling cards and components.

Mise en Garde

Certains composants du PathBuilder S24x, 26x, and 27x switch sont sensibles aux décharges électrostatiques qui peuvent les endommager. Prenez les dispositions et précautions de mise à la terre nécessaires lors de la manipulation de cartes et de composants.

Vorsicht

Einige im PathBuilder S24x, 26x, a nd 27x sw itch ver wendeten Kompo nenten so llten keinen elektrostatischen Entladungen ausgesetzt werden, durch die interne Bauteile beschädigt werden kön nen. Wenden Sie die entsprechende n Maßnahmen zur Erdung und zum Schutz vor statischen Ladungen bei der Handhabung von Karten und Komponenten an.

3-2 PathBuilder S24x, 26x, and 27x Switch Hardware Installation

Setting DIP Switches

Introduction This section expla ins ho w t o s et the DIP switche s for t he moth erb oar d a nd the Serial

Data Board (SDB) card.

Motherboard Components

Figure 3-1 is an illustration of the PathBuilder S24x, 26x, and 27x switch motherboard showing the location of the switches.

Port 1

Port 2 Port 3

Port 4

Port 6

1 2 3 4 5 6 7 8

Port 1

DIMs

Port 2

Switch 2 Switch 1

Figure 3-1. Switch Blocks on Motherboard

Motherboard Switches 1 and 2

These are the settings for motherboard switch 1 (port 1) and switch 2 (port 2). Refer to Figure 3-1.

Switch Settings for Motherboard Switches 1 and 2

Set Switch... To... For...

1–5 6–8

ON OFF

OFF ON

EIA 232-D DIM

V.11 and V.35 DIMs

9 ON Ring Indicator (DCE) 10 ON Make Busy (DTE)

PathBuilder S24x, 26x, and 27x Switch Hardware Installation 3-3

Installing the DSU DIM

Introduction You can install up to two DSUs for each PathBuilder S24x, 26x, and 27x switch

platform using both Ports 1 and 2.

DSU DIM Example Figure 3-2 shows how to install the DSU DIM.

DSU DIM

It is important that the

square markings on the DIM

are on the same side as the

round markings on the board.

Figure 3-2. DSU DIM Installation

Top of Unit

Port 1

DTE

DCE

DTE

DCE

Port 2

3-4 PathBuilder S24x, 26x, and 27x Switch Hardware Installation

Install the DSU DIM Perform these steps to install the DSU DIM:

Step Action Result/Description

1 Install the DSU DIM in the D TE

position only (see Figure 3-2).

2 Set the switc hes properly. Refer to

“Switch Settings for Motherbo ard Switches 1 and 2.”

3 Plug the EIM into the backplane

connector corresponding to the DIM port containing the DSU DIM (Port 1 or 2). Verify that the EIM is only connected to a port that has a DSU DIM installed.

4 Tighten the connector mounting

screws to provide proper grounding and to ensure signal integrity.

Installing the DSU DIM

The DSU option does not operate if the DIM is installed in the DCE position.

Caution

Be sure that the telephone company plug is disconnected before you disconnect the EIM from the PathBuilder S24x, 26x, and 27x switch. Also, do not connect the telephone company plug to the EIM until you have connected the EIM to the PathBuilder S24x, 26x, and 27x switch.

Mise en Garde

Assurez-vous que la prise de téléphone est débranchée avant de déconnecter le module d’interface externe (EIM) du PathBuilder S24x, 26x, and 27x switch. Ne la rebranchez pas au EIM avant d’avoir reconnecté le module au PathBuilder S24x, 26x, and 27x switch.

Vorsicht

Das Telefonkabel muß ausgesteckt sein, bevor Sie die Verbindung zwischen dem EIM und dem PathBuilder S24x, 26x, and 27x switch trennen. Schließen Sie das Telefonkabel erst dann wieder in das EIM an, wenn Sie die Verbindung zwischen EIM und PathBuilder S24x, 26x, and 27x switch wiederhergestellt haben.

PathBuilder S24x, 26x, and 27x Switch Hardware Installation 3-5

Installing the DSU DIM

Switch Blocks 1 and 2

The PathBuilder S24x, 26x, and 27x switch Integral DSU option requires that you set the same switches in the switch blocks as you do for the V.35, V.36, and X.21 interfaces.

These are the switch settings for the motherboard switches 1 and 2.

Switch Settings

Set Switch... To.... For. ..

1-5 6-8

OFF ON

V.11, V.35, V.36 DIMs, and the PathBuilder S24x, 26x, and 27x switch Integral DSU option

Note

There is no indication when the motherboard switches do not match the type of DIM being used. When replacing DIMs, be sure that the motherboard switches are set correctly for the particular DIM being installed.

3-6 PathBuilder S24x, 26x, and 27x Switch Hardware Installation

Configuring the PathBuilder S24x, 26x, and 27x Switch for DSU Operation

Configuration Procedure

Perform these steps from the CTP to configure the PathBuilder S24x, 26x, and 27x switch for DSU operation:

Step Action

1 Refer to the PathBuilder S200 Series Basic Protocols. However, you do

not need to complete these configuration parameters:

• Clock Speed

• Connection Type

• Port Control

2 Configure the clock source parameter under port configuration as

follows: INT Use this parameter when providing

clock to the network.

EXT Use this parameter when using the

network-provided clock (usual mode for DSU operation).

PathBuilder S24x, 26x, and 27x Switch Hardware Installation 3-7

DSU Input and Output Signaling

Introduction Input and output signa ling in form ation is usefu l as a debug gin g tool and rep laces t he

EIA summary information associated with other DIM types.

Input Signals This table describes the input signals.

NIS Not In Service

This signal is normally low (L). If no signal is received, or the DSU option is in DSU Loopback mode, or if idle codes are received, NIS is listed as high (H). This signal is used to determine if the other end of the connection is available.

BPV Bipolar Violation

This signal is “H” during normal operation. When the signal is “L,” it indicates that some type of bipolar violation was received by the DSU option. The signal toggles during a DSU loopback condition.

DL DSU Loopback

This signal is normally “H.” An “L” indicates that a DSU loopback mode is entered.

C+ Positive Sealing Current*

This signal is “H” if the DC current on the telephone company interface is not in the positive direction.

C- Negative Sealing Current*

This signal is “H” if the DC current on the telephone company interface is not in the negative direction. An “L” indicates that the DSU option has detected a negative “sealing” current and is therefore performing a CSU loopback.

Note

When both C+ and C- are “H”, it indicates that no sealing current exists. This is often the case when connec ted to othe r DSU type hard ware. Normall y, the signal for C+ is “L” when connected to central office equipment (OCU hardware).

Output Signals Although you cannot directly access the output signals, they are manipulated by the

DSU option software and may be useful for informational purposes. The following table describes the output signals.

Signal Description

RS Reset

This output resets the DSU option hardware. Its normal operating state is “H”.

LL Local Loopback

When this signal is “L”, the DSU ha rdwa re i s loc al ly lo opi ng dat a bac k to the PathBuilder S24x, 26x, and 27x switch hardware by way of the EIM.

3-8 PathBuilder S24x, 26x, and 27x Switch Hardware Installation

DSU Input and Output Signaling

Signal Description (continued)

CL CSU Loopback

When this signal is “L”, the DSU hardware is looping the remote connection's receive to transmit.

IDL Idle

An “H” on this signal tells the DSU hardware to send idle bipolar violations to the remote system.

CLK Clock Mode

The signal “H” denotes the use of the network clock. The DSU option provides the clock when this signal is “L”.

You can view these signals using the control terminal Monitor menu item on the Main menu.

Other Reporting Differences

Example of Diagnostics Menu

Other differences in control terminal output are:

• Detailed Port Statistics— show DSU input and output signaling as well as note the installed DSU DIM

• Detailed Node Statistics— show DSU DIM position

Figure 3-3 shows the Diagnostics menu. Use this menu to access the loopback options described in the next section.

Node: nodename Address (blank)Date: ___________Time:__________ Menu: Diagnostics Path: (Main.12)

1. Local Loopback

2. V.54 Loopback 2

3. V.54 Loopback 3

4. Fatal Error Reports

5. Logged Alarms«

6. Startup Diagnostics

7. DSU Internal Loopback

8. DSU Internal and External Loopback

9. Start Delay Measurement

10. Stop Delay Measurement

11. Display Delay Summary

12. IP Ping

#Enter Selection:

Figure 3-3. Diagnostics Menu

PathBuilder S24x, 26x, and 27x Switch Hardware Installation 3-9

DSU Input and Output Signaling

Control Terminal Loopback Options

These are the control terminal loopback options.

DSU Internal Loopback This loopback mode does not affect the external

interface but i t does loop t he local tran smit data back t o the receive data within the EIM. This test is useful for verifying that the EIM is connected and is working properly from a digital integrity perspective.

DSU Internal and External loopback

This loopback mode performs the internal loopback mentioned above along with looping the external transmit to the external receive to allow manual testing of the remote interface.

3-10 PathBuilder S24x, 26x, and 27x Switch Hardware Installation

T roubleshooting DSU Installation

Introduction Some potential DSU installation problems are:

• Improper port connection of the EIM.

• Improper telephone company interface connection.

• The DSU DIM is not connected in DTE configuration.

• The motherboard switches are not in the proper positions.

• The DSU option Software is not operational.

• The DSU port clock source option is not correct.

• No signal from the telephone company interface.

Troubleshooting DSU Installation

CTP Troubleshooting

If Problems Arise Installing the DSU

The following information, available from the control terminal, can help you troubleshoot.

Node Statistics Used to verify tha t t he so ft ware version contains the DSU

option modifications. It also indicates if the DSU DIM is recognized by the software.

Port Statistics Used to verify that data is sent without error. Error counts

may denote an error in clocking mode configuration. Port statistics also indicate if the software recognizes the DSU DIM.

Monitor Input and output signals determin e i f the DSU option is i n

a loopback mode reques ted by the remote end. This would explain the inability to send data. Continuous bipolar violations also indicate that the remote system is out of service.

DSU Internal Loopback

If any of your equipment is operating incorrectly, immediately remove it from the telephone line before it harms your network. If the telephone company notes the problem, they may temporarily disconnect your service. They will notify you in advance of the disconnection, when possible. If advance notification is not feasible, you will be notified as soo n as possibl e. When you are not ified, you wi ll be given the chance to correct the prob lem and be informed of your righ t to file a complaint with the FCC.

If the PathBuilder S24 x, 26x, and 27x s witch I ntegr al DSU need s repa ir, 3Com or an authorized representative of 3Com can repair it. For information, contact 3Com Technical Support at 1 800 NET 3Com (1 800 638 3266).

Failure of this loopback mode indicates that the EIM module is not connected.

PathBuilder S24x, 26x, and 27x Switch Hardware Installation 3-11

Installing DIMs

Introduction There are two Data Interface Modules (DIMs) on both the PathBuilder S24x, 26x,

and 27x switch motherboard. Each DIM is a 64-pin, dual in-line module that can be repositioned so that Ports 1 or 2 act as either DCE or DTE ports. One DIM corresponds to Port 1 and the other to Port 2.

The DIMs on the motherboard are factory set in the DTE position.

Example Figure 3-4 shows an example of installing a DIM.

Motherboard

Port 1 Port 2

Port 2

DIMs

Port 1

DTE

DCE

Figure 3-4. Installing a DIM

3-12 PathBuilder S24x, 26x, and 27x Switch Hardware Installation

Installing DIMs

Installing a DIM To install the DIM, insert it into the desired DTE or D CE location. Be sure the pins

are seated firmly in the sockets and are not bent.

Caution

Mise en Garde

Certains composants du PathBuilder S24x, 26x, and 27x switch sont sensibles aux

décharges électrostatiques qui peuvent les endommager. Prenez les dispositions et précautions de mise à la terre nécessaires lors de la manipulation de cartes et de composants.

Vorsicht

Removing a DIM To remove a DIM, lift it from its socket as shown in Figure 3-4. Be sure that you do

not bend the pins during removal.

PathBuilder S24x, 26x, and 27x Switch Hardware Installation 3-13

Installing SIMMs

Introduction This section explains how to install different types of SIMMs on the motherboard.

• DRAM: There are two types of DRAM:

- Global DRAM: This is memory that is accessible by all the boards in the

PathBuilder S24x, 26x, and 27x switch.

- Processor DRAM: This is memory dedicat ed to the Path Builder S24x , 26x,

and 27x switch’s processor.

The PathBuilder S24x, 26x, and 27x switch motherboard comes with 8 Mbytes of Processor DRAM and 4 Mbytes of Glo bal DRAM. You can add additional DRAM for a total of 8 Mbytes of Global and 16 Mbytes of Processor DRAM.

• FLASH: This is nonvolatile read/write memory.

• CMEM: This is nonvolatile (battery backed-up) configuration memory. This is where the real time clock is located.

• Data Compression: This is optional SIMM that is used for data compression functions.

Caution

Mise en Garde

Vorsicht

3-14 PathBuilder S24x, 26x, and 27x Switch Hardware Installation

Installing SIMMs

SIMM Location Figure 3-5 shows the locat ion of t he Single In-line Memory Module (SIMM) s lots on

the PathBuilder S24x, 26x, and 27x switch motherboard.

Insert SIMM into socket at a slight angle.

Data Compression SIMM

Locking Tabs

Global DRAM

SIMM Slot

FLASH

Optional FLASH

CMEM

Data Compression

Optional Flash SIMM

CMEM SIMM Slot

SIMMs

DRAM Processor Slots

Motherboard

Figure 3-5. Installing SIMMs

Installing a SIMM Perform these steps to install the SIMM:

Step Action

1 Insert the SIMM at a slight angle as shown in Figure 3-5. 2 Snap the SIMM into the vertical position. 3 Be sure it lo cks in place w ith the locki ng tabs in a vertical posit ion.

Removing a SIMM When removing a SIMM, gently disengage locking tabs and lift out the SIMM.

PathBuilder S24x, 26x, and 27x Switch Hardware Installation 3-15

Installing I/O Cards

Introduction These PathBuilder S24x, 26x, and 27x switch I/O cards are installed into slots 1

through 8:

• Serial Data Board (SDB)

• BRI

•Hub

The Modem card can only be installed into slot 1.

Installing an I/O Card

Perform these steps to install any of the I/O cards:

Step Action

1 Align the card and the appropriate slot. 2 Insert the card, making the proper connection on the motherboard. 3 Fasten each card with a single holding screw to the rear of the

PathBuilder S24x, 26x, and 27x switch chassis.

3-16 PathBuilder S24x, 26x, and 27x Switch Hardware Installation

Installing a T1 or E1 Dual Port Digital PBX Interface Card

Introduction This section provides installation instructions for the T1 or E1 dual port digital PBX

interface card for the PathBuilder S24x, 26x, and 27x switch. It also provides a section on installing a T1/CSU Daughter card onto the T1 Dual Port Card.

Slot Restriction One T1 or E1 dual port digital PBX interface card may only be installed in exp ansion

slot 8 in the PathBuilder S24x, 26x, and 27x switch.

Installation Procedure

Follow these steps to install a T1 or E1 dual port digital PBX interface card.

Caution

Observe antistatic precautions whenever handling interface cards to avoid damaging sensitive components. Wear a ground strap connected to a grounded equipment frame whenever handling the interface card; always transport the card in an antistatic bag.

Mise en Garde

Prenez des précautions antistatiques lors de la manipulation des cartes d’interface afin de ne pas endommager les composants sensibles. Portez une bande de mise à la masse raccordée à un équipement mis à la terre lors de la manipulation d’une carte d’interface, transportez-la toujours dans un sac antistatique.

Bitte beachten Sie bei der Handhabung der Schnittstellenkarten die Vorsichtsmaßnahmen zur Antistatik, um anfällige Bauteile vor Beschädigungen zu schützen. Tragen Sie einen Schutzerdungsleiter, der mit einem geerdeten Gerätegehäuse verbunden ist, wenn Sie die Schnittstellenkarte berühren. Transportieren Sie die Karte immer in einer antistatischen Hülle.

Warning

Do not attempt to install the int erfac e card whi le the PathBuil der S24x , 26x, and 27x switch is running.

Avertissement

Ne tentez pas d’installer une carte d’interface lorsque le PathBuilder S24x, 26x, and 27x switch fonctionne.

Warnung

Versuchen Sie nicht, die Schnittstellenkarte während des Betriebs des PathBuilder S24x, 26x, and 27x switch zu installieren.

PathBuilder S24x, 26x, and 27x Switch Hardware Installation 3-17

Installing a T1 or E1 Dual Port Digital PBX Interface Card

Step Action

1 Place the interface card on an antistatic mat. 2 Set the I/O base address for the card using the DIP switches at SW1. 3 Power down the PathBuilder S200 series switch by unplugging the AC

power plug.

4 Remove the cover from the PathBuilder S24x, 26x, and 27x switch as

shown in Figure 4-1 on page 4-4.

5 Use expansion slot 8. If necessary, unfasten the bracket screw and

remove the bracket that covers the chassis opening for slot 8.

6 Holding the interface card by the rear bracket and board edges, gently

insert the card into expansion slot 8, aligning the card with the card guides and making proper connection on the motherboard. Ensure that the card is seated securely in the expansion slot.

7 Secure the card to the chassis using the bracket screw. 8 Connect the 40-pin MVIP ribbon cable to the Multi-Vendor Integration

Protocol interface on the top edge of the digital PBX interface card by snapping it so that the tabs match.

9 Connect the other end of the 40-pin MVIP ribbon cable to the

appropriate DSPM/SM cards’ MVIP connector by snapping it so that the tabs match.

10 Replace the PathBuilder S24x, 26x, and 27x switch cover.

11 Connect the spans to the connectors on the digital PBX interface card

rear bracket.

12 Plug the AC power cord in.

Result:

The LEDs on th e rear bracket remain off until the card is reset and the software is downloaded. after the download is complete, the green RUN LED remains on.

3-18 PathBuilder S24x, 26x, and 27x Switch Hardware Installation

Installing a T1 or E1 Dual Port Digital PBX Interface Card

Installing the T1/CSU Daughter Card

Introduction This section explains how to install a T1/CSU Daughter Card onto a T1 Dual Port

Card. When installing the T1/CSU card be certain that the T1 Dual Port card is not next to

an FXO, FXS, or E&M card. Because these cards have components on both sides, they might come in contact with the T1/CSU card, damaging both cards.

Caution

Mise en Garde

Vorsicht

Warning

Do not attempt to install the int erfac e card whi le the PathBuil der S24x , 26x, and 27x switch is running.

Avertissement

Ne tentez pas d’installer une carte d’interface lorsque le PathBuilder S24x, 26x, and 27x switch fonctionne.

Warnung

Versuchen Sie nicht, die Schnittstellenkarte während des Betriebs des PathBuilder S24x, 26x, and 27x switch zu installieren.

PathBuilder S24x, 26x, and 27x Switch Hardware Installation 3-19

Installing a T1 or E1 Dual Port Digital PBX Interface Card

Installation Procedure

Follow these steps to install the T1/CSU Daughter card.

Step Action

1 Power down the PathBuilder S200 series switch by unplugging the AC

power plug.

2 Remove the c ables from the r ear of the T1 Dual Port Interface card. 3 Remove the cover from the PathBuilder S24x, 26x, and 27x switch as

shown in Figure 4-1 on page 4-4.

4 Use a screw driver to loosen the bracket screw and remove the T1 Dual

Interface card.

5 Place the card on an antistatic mat. 6 Locate the pin connectors on the T1 Dual Port Card. See Figure 3-6.

The upper connectors suppor t Port 49 and the lower connec tors support Port 50.

7 Using a pair of long-nose pliers or a small screw driver, remove the

small jumpers from the connectors.

8 Carefully insert the T1/CSU Daughter Card(s) into the pin connectors.

Ensure that the card is seated securely.

9 Insert the T1 Dual Port car d into ex pansio n slot 8, aligning the card with

the card guides and making proper connection on the motherboard. Ensure that the card is seated securely.

10 Secure the card to the chassis using the bracket screw.

11 Replace the PathBuilder S24x, 26x, and 27x switch cover. 12 Reconnect the cables to the T1 Dual Port card. 13 Plug in the AC power cord.

3-20 PathBuilder S24x, 26x, and 27x Switch Hardware Installation

Installing a T1 or E1 Dual Port Digital PBX Interface Card

Carefully install Daughtercard Pins into T1 Dual Port Interface Connector.

Remove Jumper from Socket

Figure 3-6. Installing T1/CSU Daughter Cards

PathBuilder S24x, 26x, and 27x Switch Hardware Installation 3-21

Cabling the PathBuilder S24x, 26x, and 27x Switch

Introduction This section describes the connections for:

• Control Terminal Port (CTP)

• I/O Interface cards

• Network Manager

•LAN

• An external power source

CTP Connection The CTP is set as Port 6 on the rear of the PathBuilder S24x, 26x, and 27x switch. It

is a fixed EIA 232-D DCE interface terminating on a DB-25 connector. No special cabling is require d. Typically , a stra ight- throug h DB-25 mal e to DB- 25 male cab le is required for connection to a terminal dev ice.

I/O Interface Port Connection

Network Manager Connection

LAN Connection You can connect a PathBuilder S24x, 26x, and 27x switch to a LAN with a router.

Procedure Follow these steps to connect to an external power source:

Three of the I/O po rts on t he backpl ane of t he PathBui lder S24x , 26x, and 27x switch chassis are DB-25 female connectors. One of the I/O ports is a DB-15 female connector. You do not need additional cables if the DIM-based ports (Ports 1 and 2) have EIA 232-D DIMs installed.

The PathBuilder S24x, 26x, and 27x switch supports direct manager connection using the CTP. There is a seri al inte rface connecti on for th e SNMP manager. Y o u can attach the control terminal to any asynchronous PAD port.

The router can be either an exter nal router connec ted to a PathBuil der S24x, 26x, and 27x switch using a Frame Relay connection or a PathBuilder S200 series switch internal router. For more LAN connection informatio n, refer to Appendix A, Appendix.

Step Action R esult/Description

1 Verify that the 115/230 V AC Switch on

the rear panel is set for the specific country’s requirements.

2 If you are using an AC power supply,

connect the power cord to the back of the PathBuilder S24x, 26x, and 27x switch enclosure and then to the appropriate power source.

If you are using a -48VDC inpu t power supply, verify correct polarity with a Volt mete r.

Be sure that the AC power cord meets requirements for the country of use.

The PathBuilder S24x, 26x, and 27x switch unit automatically powers on and runs selfdiagnostics.

3-22 PathBuilder S24x, 26x, and 27x Switch Hardware Installation

Installing the Transceiver

Installing the T ransceiver

Introduction The transceiver mounts to the DB-15 AUI connector of the Ethernet LAN card or to

the DB-15 AUI connector on the bac k panel . The Thin- Net BNC connect or pro vides subsequent interface to the coaxial network.

The SQE can be turned ON and OFF by setting a switch on the side of the housing.

Note

The transc eiver is shipped with the S QE set to the OFF position.

Transceiver Illustration

Figure 3-7 shows a transceiver.

Thin-NET BNC Connector

15-Pin D-Type Connector

SQE Switch

Figure 3-7. Transceiver

PathBuilder S24x, 26x, and 27x Switch Hardware Installation 3-23

Power-Up Diagnostics/Verification

Power-Up Diagnostics/V erification

Introduction Diagnostics run when a node is powered up. Basic tests are run from PROM and

more extensive diagnostics are run during startup. If the node detects a lack of so ftware, it sends a messa ge to the CTP. The yellow LED

lights and a 2-digit code is displayed. You must initiate a softw are coldload if needed.

Power Up Sequence

This is the power-up sequen ce.

Function Description

ROM-based diagnostics Local core self-tests. Boots PROM

FLASH verification Checksum FLASH image. Loads RAM diagnostics Uncompresses FLASH diagnostics image

RAM-based diagnostics T est s I/O car ds and eve rything el se on ca rd. Loads RAM operational

software Verifies Config database Verifies resident CMEM database.

Node Restarts The three types of restarts are:

• Coldstart

•Warmstart

• Default Node

checksum, MPU test, Program RAM test.

to RAM and executes.

Uncompresses FLASH operational software i mage to RAM and executes.

Node Coldstart A node coldstart is similar to a power-up. It follows the power-up sequence except

that it is initiated when the operator presses the RESET button on the front panel or when certain software faults occur. All calls are cleared along with Event queues. A Node coldstart loads only configuration memory.

Node Warmstart A node warmstart can be initiated by a software fault or an operator command. It is

identical to a coldstart except for the following:

• No diagnostic testing is performed.

• Code downloads are not performed unless necessary.

• Event logs are not erased.

3-24 PathBuilder S24x, 26x, and 27x Switch Hardware Installation

Power-Up Diagnostics/Verification

Default Node Command

Setting Node to Default Configuration

A default node comman d is th e sa me as a war mstart , ex cept i t is on ly initi ated b y th e operator. The Current configuration bank in nonvolatile CMEM memory is erased and replaced by the system default configuration.

You can set a node to the default configuration by choosing the Default Node selection from the CTP Main menu.

PathBuilder S24x, 26x, and 27x Switch Hardware Installation 3-25

Installing Software Options

Introduction The PathBuilder S24x, 26x, and 27x switch contains all the software options

available for the current release of the product. In some cases, the options have already been enabled. However, in other cases, the option you want to use needs to be enabled. Refer to the latest Software Re lease Notice fo r more information.

3-26 PathBuilder S24x, 26x, and 27x Switch Hardware Installation

Full Mesh Cluster Cabling

Introduction This section explains some of the important points to keep in mind when using your

PathBuilder S24x, 26x, and 27x switches in a full mesh cluster configuration.

Usage A full mesh application uses standard networking ports on the PathBuilder S24x,

26x, and 27x switch (ports 1, 2, and 3) and standard networking protocols appropriate for your application (X.25, Voice Relay, etc.). All networking services are available to the circuits between the clustered nodes.

Configuring When configuring a full mesh application, remember that each node must be

configured individually. Ports 1, 2, and 3 on each PathBuilder S24x, 26x, and 27x switch will appear normally on the Port Record. The parameter Clock Speed and the appropriate clock mode (Int, Ext, etc.) should be set depending on the DIM position and speed. Clock speeds up to 2.048 Mbps are supported.

Cables When cabling PathBuilder S200 ser ies switch in a mesh appl ic ati on, use DB25 male

to DB25 male straight-through cables.

Ports To use your PathBuilder S24x, 26x, and 27x switch in a full mesh cluster, note that:

• Ports 1, 2, and 3 on all four nodes are for the mesh connections.

• Port 3 is always a DTE port (V.36 electrical).

• Ports 1 and 2 can be either DCE or DTE ports. This is determined by the way

you set the V.36 DIMs on the motherboard. Refer to the “Installing DIMs” section earlier in this chapter.

PathBuilder S24x, 26x, and 27x Switch Hardware Installation 3-27

Full Mesh Cluster Cabling

Mesh Diagram Figure 3-8 shows how a full mesh application is cabled.

PB S200 (Rear View)

Port 1 (T)

Port 2 (T)

T =DTE Port C=DCE Port

Port 3 (T)

Port 1 (C)

Port 2 (C)

PB S200 (Rear View)

Port 3 (T)

Figure 3-8. Mesh Diagram

Port 1 (C)

Port 2 (C)

PB S200 (Rear View)

Port 3 (T)

Port 1 (C)

Port 2 (C)

PB S200

(Rear View)

Port 3 (T)

3-28 PathBuilder S24x, 26x, and 27x Switch Hardware Installation

Chapter 4

Maintenance

Overview

Introduction This chapter contains procedures to remove/replace the PathBuilder S24x, 26x, and

27x switch components.

Warning

Only trained, qualified technicians should perform procedures outlined in this manual. 3Com PathBuilder S200 series s witch daught ercards and DIMs are s ensitiv e to static discharge, which can damage components. Trained, qualified technicians will use proper handling and grounding precautions when handling a 3Com PathBuilder S200 series switch daughtercard or DIM.

Avertissement

Seuls des techniciens qualifiés doivent mettre en pratique les procédures décrites dans ce manuel. Les cartes fille 3Com PathBuilder S200 series switch et les DIM sont sensibles aux décha r ges stati ques qu i peuvent endommage r le s compos ants. Les techniciens formés et qualifiés prendront les dispositions et précautions de mise à la terre nécessaires lors de la manipulation de cartes fille 3Com PathBuilder S200 series switch et de DIM.

Warnung

Die in diesem Handbuch aufgeführten Vorgänge sollten ausschließlich von geschulten und qualifiz ierten Technikern durchgeführt werden. Da PathBuilde r S200 series switch-Zusatzkarten und DIMs von 3Com keinen statischen Entladungen ausgesetzt werden sollten, da Komponenten beschädigt werden können, werden sie von dem qualifizierten technischen Personal mit den entsprechenden Maßnahmen zur Erdung und zum Schutz vor statischen Ladungen gehandhabt.

Caution

Mise en Garde

Maintenance 4-1

Vorsicht

Einige im PathBuilder S24x, 26x, a nd 27x sw itch ver wendeten Kompo nenten so llten keinen elektrostatischen Entladungen ausgesetzt werden, durch die interne Bauteile

beschädigt werden kön nen. Wenden Sie die entsprechende n Maßnahmen zur Erdung und zum Schutz vor statischen Ladungen bei der Handhabung von Karten und Komponenten an.

4-2 Maintenance

Removing/Replacing Top Cover

Not

Removing/Replacing T op Cover

Introduction You must remove the top cover to access the motherboard and all I/O cards, the

power supply, and the fan.

Removing the Cover

Perform these steps to remove the top cover of the PathBuilder S24x, 26x, and 27x switch:

Step Action

1 Verify that the pow er is OFF. 2 Remove the six screws from the back of the chassis (Figure 4-1 ). 3 Pull the cov er toward the re ar of the unit (a pproximately 1 /4 inch). 4 Lift up to release from the sliding clips.

Be sure not to damage spring clips on chassis.

Maintenance 4-3

Removing/Replacing Top Cover

Example Figure 4-1 shows an example of removing the top cover of the PathBuilder S24x,

26x, and 27x switch.

Pull cover 1/4-in. toward rear.

Lift cover.

Remove six screws.

Figure 4-1. Removing the Top Cover

Replace the Cover To replace the top cover, reverse the steps just detailed in “Removing the Cover.”

4-4 Maintenance

3Com S26x, S27x, S24x User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Restricted Rights Notification for U.S. Government Users

Proprietary Material

Contents

Applications

Features and Protocols

Hardware Components

Enclosure

Motherboard

Back Panel

TI Dual Port Digital PBX Interface Card

E1 Dual Port Digital PBX Interface Card

DSPM/SM Card

DSPM Card with Analog E&M Interface

Setting Jumpers for DSPM Card with Analog E&M Interface

DSPM Card with FXS Analog Interface

DSPM Host Card with FXO Analog Interface

-48V Ringer/Power Supply Card and Enclosure

10BaseT Transceiver

Radio Frequency Interference Regulations

Telecommunications Regulations

FCC and Telephone Company Procedures and Requirements

FCC Information

Before Installing Your PathBuilder S24x, 26x, and 27x Switch

Unpacking

The PathBuilder S24x, 26x, and 27x Switch Rackmount Kit

Installing the PathBuilder S24x, 26x, and 27x Switch in an Equipment Rack

Setting DIP Switches

Installing the DSU DIM

Configuring the PathBuilder S24x, 26x, and 27x Switch for DSU Operation

DSU Input and Output Signaling

T roubleshooting DSU Installation

Installing DIMs

Installing SIMMs

Installing I/O Cards

Installing a T1 or E1 Dual Port Digital PBX Interface Card

Installing the T1/CSU Daughter Card

Cabling the PathBuilder S24x, 26x, and 27x Switch

Installing the Transceiver

Power-Up Diagnostics/Verification

Installing Software Options

Full Mesh Cluster Cabling

Removing/Replacing Top Cover