Cisco MGX 8850 User Manual

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Cisco MGX 8850 Multiservice Switch Installation and Configuration

Release 1.1.3 September 2002

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The following information is for FCC compliance of Class A devices: 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 protection against harmful 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 used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case users will be required to correct the interference at their own expense.

The following information is for FCC compliance of Class B devices: The equipment described in this manual generates and may radiate radio-frequency energy. If it is not installed in accordance with Cisco’s installation instructions, it may cause interference with radio and television reception. This equipment has been tested and found to comply with the limits for a Class B digital device in accordance with the specifications in part 15 of the FCC rules. These specifications are designed to provide reasonable protection against such interference in a residential installation. However, there is no guarantee that interference will not occur in a particular installation.

Modifying the equipment without Cisco’s written authorization may result in the equipment no longer complying with FCC requirements for Class A or Class B digital devices. In that event, your right to use the equipment may be limited by FCC regulations, and you may be required to correct any interference to radio or television communications at your own expense.

You can determine whether your equipment is causing interference by turning it off. If the interference stops, it was probably caused by the Cisco equipment or one of its peripheral devices. If the equipment causes interference to radio or television reception, try to correct the interference by using one or more of the following measures:

• Turn the television or radio antenna until the interference stops.

• Move the equipment to one side or the other of the television or radio.

• Move the equipment farther away from the television or radio.

• Plug the equipment into an outlet that is on a different circuit from the television or radio. (That is, make certain the equipment and the television or radio are on circuits controlled by different circuit breakers or fuses.)

Modifications to this product not authorized by Cisco Systems, Inc. could void the FCC approval and negate your authority to operate the product.

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Cisco MGX 8850 Multiservice Switch Installation and Configuration

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Preface xxiii

Objectives xxiii

Audience xxiii

Organization xxiii

Objectives

Preface

This preface describes the objectives, audience, organization, and conventions of the Cisco MGX 8850 Multiservice Switch Installation and Configuration publication.

This publication provides descriptions for installing and configuring the following MGX 8850 hardware:

• Enclosures

Audience

The Cisco MGX 8850 Multiservice Switch Installation and Configuration publication provides installers, operators, and network designers and managers with the necessary information to set up any applications of the MGX 8850 switches.

Organization

The major sections of this publication are as follows:

Chapter Title Description

Chapter 1 Introducing the MGX 8850 Describes the features and functions of the MGX 8850

• Power sources (AC and DC)

• Controller cards (the CPU for the node)

• Frame Relay interface cards

• ATM interface cards

• Trunk cards

switch.

Chapter 2 Module and Service

Descriptions

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Describes the set of modules available with the MGX

8850.

Cisco MGX 8850 Multiservice Switch Installation and Configuration

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Conventions

Documentation Description

Cisco WAN Switching SuperUser Command Reference, Release 9.3.10

Provides detailed information on the command line interface commands requiring SuperUser access authorization

DOC-7810702=

Cisco MPLS Controller Software Configuration Guide, Release 9.3.10

Provides information on a method for forwarding packets through a network.

DOC-7811658=

Conventions

This publication uses the following conventions to convey instructions and information.

Command descriptions use these conventions:

• Commands and keywords are in boldface.

• Arguments for which you supply values are in italics.

• Required command arguments are inside angle brackets (< >).

Preface

• Optional command arguments are in square brackets ([ ]).

• Alternative keywords are separated by vertical bars ( | ).

Examples use these conventions:

• Terminal sessions and information the system displays are in screen font.

• Information you enter is in boldface screen font.

• Nonprinting characters, such as passwords, are in angle brackets (< >).

• Default responses to system prompts are in square brackets ([ ]).

Notes, cautions, and warnings use the following conventions and symbols:

Note Means reader take note. Notes contain helpful suggestions or references to materials not contained

in this manual.

Caution Means reader be careful. In this situation, you might do something that could result in equipment

damage or loss of data.

Warning

This warning symbol means danger. You are in a situation that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents.

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Preface

Obtaining Documentation

The following sections explain how to obtain documentation from Cisco Systems.

World Wide Web

You can access the most current Cisco documentation on the World Wide Web at the following URL:

http://www.cisco.com

Translated documentation is available at the following URL:

http://www.cisco.com/public/countries_languages.shtml

Documentation CD-ROM

Cisco documentation and additional literature are available in a Cisco Documentation CD-ROM package, which is shipped with your product. The Documentation CD-ROM is updated monthly and may be more current than printed documentation. The CD-ROM package is available as a single unit or through an annual subscription.

Obtaining Documentation

Ordering Documentation

Cisco documentation is available in the following ways:

• Registered Cisco Direct Customers can order Cisco product documentation from the Networking

Products MarketPlace:

http://www.cisco.com/cgi-bin/order/order_root.pl

• Registered Cisco.com users can order the Documentation CD-ROM through the online Subscription

Store:

http://www.cisco.com/go/subscription

• Nonregistered Cisco.com users can order documentation through a local account representative by

calling Cisco corporate headquarters (California, USA) at 408 526-7208 or, elsewhere in North America, by calling 800 553-NETS (6387).

Documentation Feedback

If you are reading Cisco product documentation on Cisco.com, you can submit technical comments electronically. Click Leave Feedback at the bottom of the Cisco Documentation home page. After you complete the form, print it out and fax it to Cisco at 408 527-0730.

You can e-mail your comments to bug-doc@cisco.com.

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Obtaining Technical Assistance

To submit your comments by mail, use the response card behind the front cover of your document, or write to the following address:

Cisco Systems Attn: Document Resource Connection 170 West Tasman Drive San Jose, CA 95134-9883

We appreciate your comments.

Obtaining Technical Assistance

Cisco provides Cisco.com as a starting point for all technical assistance. Customers and partners can obtain documentation, troubleshooting tips, and sample configurations from online tools by using the Cisco Technical Assistance Center (TAC) Web Site. Cisco.com registered users have complete access to the technical support resources on the Cisco TAC Web Site.

Cisco.com

Preface

Cisco.com is the foundation of a suite of interactive, networked services that provides immediate, open access to Cisco information, networking solutions, services, programs, and resources at any time, from anywhere in the world.

Cisco.com is a highly integrated Internet application and a powerful, easy-to-use tool that provides a broad range of features and services to help you to

• Streamline business processes and improve productivity

• Resolve technical issues with online support

• Download and test software packages

• Order Cisco learning materials and merchandise

• Register for online skill assessment, training, and certification programs

You can self-register on Cisco.com to obtain customized information and service. To access Cisco.com, go to the following URL:

http://www.cisco.com

Technical Assistance Center

The Cisco TAC is available to all customers who need technical assistance with a Cisco product, technology, or solution. Two types of support are available through the Cisco TAC: the Cisco TAC Web Site and the Cisco TAC Escalation Center.

Inquiries to Cisco TAC are categorized according to the urgency of the issue:

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• Priority level 4 (P4)—You need information or assistance concerning Cisco product capabilities,

product installation, or basic product configuration.

• Priority level 3 (P3)—Your network performance is degraded. Network functionality is noticeably

impaired, but most business operations continue.

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Preface

• Priority level 2 (P2)—Your production network is severely degraded, affecting significant aspects

• Priority level 1 (P1)—Your production network is down, and a critical impact to business operations

Which Cisco TAC resource you choose is based on the priority of the problem and the conditions of service contracts, when applicable.

Cisco TAC Web Site

The Cisco TAC Web Site allows you to resolve P3 and P4 issues yourself, saving both cost and time. The site provides around-the-clock access to online tools, knowledge bases, and software. To access the Cisco TAC Web Site, go to the following URL:

http://www.cisco.com/tac

All customers, partners, and resellers who have a valid Cisco services contract have complete access to the technical support resources on the Cisco TAC Web Site. The Cisco TAC Web Site requires a Cisco.com login ID and password. If you have a valid service contract but do not have a login ID or password, go to the following URL to register:

http://www.cisco.com/register/

If you cannot resolve your technical issues by using the Cisco TAC Web Site, and you are a Cisco.com registered user, you can open a case online by using the TAC Case Open tool at the following URL:

Obtaining Technical Assistance

of business operations. No workaround is available.

will occur if service is not restored quickly. No workaround is available.

http://www.cisco.com/tac/caseopen

If you have Internet access, it is recommended that you open P3 and P4 cases through the Cisco TAC Web Si t e .

Cisco TAC Escalation Center

The Cisco TAC Escalation Center addresses issues that are classified as priority level 1 or priority level 2; these classifications are assigned when severe network degradation significantly impacts business operations. When you contact the TAC Escalation Center with a P1 or P2 problem, a Cisco TAC engineer will automatically open a case.

To obtain a directory of toll-free Cisco TAC telephone numbers for your country, go to the following URL:

http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml

Before calling, please check with your network operations center to determine the level of Cisco support services to which your company is entitled; for example, SMARTnet, SMARTnet Onsite, or Network Supported Accounts (NSA). In addition, please have available your service agreement number and your product serial number.

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Obtaining Technical Assistance

Preface

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CHAPTER

Introducing the MGX 8850

This chapter contains an introduction to the Cisco MGX 8850 switch including a summary of product features and equipment.

For more detailed descriptions of the Service Modules, cards and services, see Chapter 2, “Module and

Service Descriptions”

This chapter contains the following information:

• MGX 8850 System Overview, page 1-1

–

Applications of the MGX 8850, page 1-3

–

Universal Edge Architecture, page 1-3

–

Standards-Based Conversion to ATM, page 1-4

–

MGX 8850 Enclosure and Power, page 1-5

–

MGX 8850 Management, page 1-5

• Summary of the MGX 8850 Cards and Modules, page 1-6

• Redundancy for Service Modules, page 1-10

MGX 8850 System Overview

The MGX 8850 is an IP+ATM switch for high-density aggregation of IP, voice, Frame Relay, circuit emulation and ATM services. The MGX 8850 can act as a stand-alone switch or as a feeder node for the Cisco BPX 8600 series and MGX 8850 switches. The MGX 8850 switch offers up to 1.2 Gbps of IP + ATM switching capacity.

The MGX 8850 switch supports the following services:

• IP VPNs using Cisco IOS software-based MPLS/label switching.

• Full suite of voice-over-IP, voice-over-ATM, and capabilities with full interworking.

• Frame Relay services.

• High-density Point-to-Point Protocol (PPP) for Internet access and aggregation.

• Narrowband ATM for managed data, voice, and video services.

• Circuit Emulation (CE) for private line replacement.

Figure 1-1 is an illustration of an AC-powered MGX 8850.

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MGX 8850 System Overview

Figure 1-1 MGX 8850

Chapter 1 Introducing the MGX 8850

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Chapter 1 Introducing the MGX 8850

Applications of the MGX 8850

The MGX 8850 operates with the applications listed in Table 1-1:

Table 1-1 MGX 8850 Applications

Application Description

Feeder The MGX 8850 concentrates narrow-band and medium-band

Stand-alone Switch The MGX 8850 can be deployed as a stand-alone switch,

Multiprotocol Label Switch As a component of the BPX 8680-IP universal service node,

Consolidation of Cisco CPE Traffic

Mulitservice Stand-alone Concentrator

MGX 8850 System Overview

ATM, Frame Relay, and into a single, wide-band ATM feeder trunk that connects to a BPX 8600 series switch or a MGX 8850 switch.

providing “cross-connect” connections between UNI and NNI ports. Traditionally, this would be used in a concentration-type mode, allowing standards-based adaptation and concentration of multiservice traffic onto one or more high-speed ATM interfaces. This enables the MGX 8850 to interface to a multivendor ATM network, or to any other ATM attached device (such as a Cisco 7200 or GSR router LS1010, MSR 8450, and so on). The MGX 8850 interfaces to the ATM equipment using a standard ATM UNI or NNI.

the MGX 8850 is capable of forwarding traffic into the BPX Multiprotocol Label Switching (MPLS) network by acting as a multiservice feeder

At the edge of the network, the MGX 8850 can interwork with and consolidate a wide variety of CPE equipment.

The MGX 8850 can be deployed as a stand-alone concentrator, interfacing to a multivendor ATM (non-BPX) network, as shown Figure 1-5. The MGX 8850 interfaces to ATM equipment using a standard ATM UNI or NNI.

Note Refer to the Cisco MGX 8850 Multiservice Switch Overview for additional information on the

applications of the MGX 8850.

Note See Chapter 5, “Configuring the MGX 8850 Shelf”for information on configuring the MGX 8850

applications.

Universal Edge Architecture

The MGX 8850 supports a wide range of services over narrowband and mid-band user interfaces by mapping all service traffic to and from ATM using standardized interworking methods.

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Card Slot Locations

The supported interfaces for user-traffic are:

• Frame Relay UNI on T3, E3, HSSI, T1, and E1 lines.

• ATM UNI and FUNI interfaces.

• Optional inverse multiplexing for ATM (IMA).

• Frame Relay to ATM network interworking and service interworking.

• Circuit Emulation services for T1/E1 and T3/E3 lines.

The optional Service Resource Module-3T3 (MGX-SRM-3T3/C) can support up to 80-T1 interfaces over its three T3 lines. The MGX-SRM-3T3/C can also provide 1:N redundancy for the T1 and E1 line cards.

The modular, software-based system architecture enables the MGX 8850 to support new features through downloadable software upgrades or new hardware modules.

The MGX 8850 backplane supports a minimum of 1.2 Gbps of non-blocking switching up to 45 Gbps. Individual line rates range from DS0 through OC-12.

Card Slot Locations

Chapter 1 Introducing the MGX 8850

The reserved slots are 7 and 8 for the primary and redundant Processor Switching Modules (PXM1s) and 15, 16, 31, and 32 for the Service Resource Modules (SRMs). These slot reservations reflect a fully redundant configuration for these cards. The maximum number of slots remaining for service modules is 24—less when the unit contains one or more double-height cards such as the Route Processor Module (RPM). Although not reserved, slots 9 and 10 should be the first choices for the location of one or more RPMs due to backplane wiring.

If you are considering any future card changes in which you replace a single-height card with a double-height card, place the single-height replacement candidates as far left in the card cage as possible. The reason is that single to double-height slot conversions must begin at the left and proceed to the right.

The slots on the top half of the card cage are suitable for the T3/E3 and OC-3 cards because the higher speed cell buses reside in the upper portion of the backplane. Place the service modules that operate at T1 or E1 rates in the lower half of the switch.

Standards-Based Conversion to ATM

The MGX 8850 converts all user information into 53-byte ATM cells by using the appropriate ATM Adaptation Layer (AAL) for transport over the ATM backbone network. The individual service modules segment and reassemble (SAR) cells to eliminate system bottlenecks. The following list shows the applicable AAL for each service:

• Circuit emulation services uses AAL1.

• Frame Relay-to-ATM network interworking uses AAL5 and Frame Relay Service Specific

Convergence Sub-layer (FR-SSCS).

• Frame Relay-to-ATM service interworking uses both transparent and translation modes to map

Frame Relay to native ATM AAL5.

• Frame Forwarding uses AAL5.

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Chapter 1 Introducing the MGX 8850

MGX 8850 Enclosure and Power

The MGX 8850 enclosure contains up to 24 service modules (I/O cards). In addition, up to four optional Service Redundancy Modules (SRMs) provide redundancy. The MGX 8850 resides in either in a 19-inch or a 23-inch rack. The closed, 19-inch Cisco-built rack also has an optional seismic anchor. The system can accept power from either a DC or an AC source (see Tab l e 1-2).

Table 1-2 Power Supply Options

Model Description

MGX-DC MGX 8850 DC PEM and MBX-CAB-AC/DC

MGX-AC1-1 NR AC system for MGX 8850: AC shelf, 1 feed, 1 PS,

MGX-CAB-AC/DC

MGX-AC2-2 Red AC power, red AC feed, AC shelf, 2 PS, 2 MGX-CAB-AC/DC

PS-1200-AC 1200W power supply for AC systems

Chapter 3, “Site Preparation” and Chapter 4, “Enclosure and Card Installation” contain additional

information.

Card Slot Locations

MGX 8850 Management

Firmware on each card determines the functions and operations of the module. This firmware can be upgraded by downloading new firmware with a TFTP application running on a workstation or a PC.

The current status and configuration parameters of the modules reside in a Management Information Base (MIB). The MIB is updated by the firmware in the modules whenever changes to the module status or configuration occur. The MIB can be interrogated using SNMP commands.

The MGX 8850 supports the following user interface applications:

• Cisco WAN Manager (formerly StrataView Plus)—Graphical User Interface (GUI) application for

connection management. This application enables operations, administration, and maintenance of WAN-multiservice networks.

• CiscoView—a GUI application for hardware configuration.

• Command line interface (CLI)—the CLI is used for low-level control of hardware functionality and

connection control.

The following ports are used to communicate with the MGX 8850:

• Control port (SLIP protocol only) on the PXM1-UI back card.

• LAN (Ethernet) port on the PXM1-UI back card.

• In-band ATM connection (feeder application only).

All of these ports support access by the CLI via Telnet, TFTP, and SNMP.

Note See the “User Interface Access Ports” section on page 5-2 for additional information on the ports

used to manage and configure the MGX 8850.

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Summary of the MGX 8850 Cards and Modules

This section contains a summary of the service cards and modules supported by the MGX 8850.

For more detailed descriptions and illustrations of cards, modules and the services see Chapter 2,

“Module and Service Descriptions”.

Introduction to Core Card Sets and Service Modules

The MGX 8850 supports core cards and service modules. The Processor Switching Module (PXM1) and optional Service Resource Module (SRM) are core cards.

In addition, the PXM1 is part of a card set consisting of a front card, a back card, and a daughter card:

• Front card contains the processing intelligence.

• Daughter card contains the firmware that distinguishes the interface (OC-3, T3, E3, and so on).

• Back card is a simple card that provides the electrical interface for one or more lines of a particular

type.

Service modules are not combined in this manner and are never part of a card set. Instead, service modules provide the interface for transport technologies such as Frame Relay and ATM.

The MGX 8850 enclosure contains up to 24-service modules (I/O cards). Four optional Service Redundancy Modules (SRMs) provide redundancy.

Chapter 1 Introducing the MGX 8850

Note Although technically distinct, the terms card and module are often used interchangeably in the field.

The MGX 8850 cards (modules) and their functions are shown in Tab le 1- 3.

Table 1-3 MGX 8850 Modules and Cards

Modules Description

Processor Switching Module (PXM1)

User Interface Back Cards

This front card controls the MGX 8850 and supports external interfaces for user-access and trunking for UNI ports. The back cards consist of a user interface and a broadband network module.

• Processor Switch Module User Interface (PXM1-UI)

The PXM1-UI is the user interface card that has various types of user access used to control and configure the MGX 8850.

• Processor Switch Module User Interface (PXM-UI-S3)

The PXM-UI-S3 is an optional user interface card that has various types of user access used to control and configure the MGX 8850. This card also provides Stratum 3 clocking capability.

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Chapter 1 Introducing the MGX 8850

Table 1-3 MGX 8850 Modules and Cards (continued)

Modules Description

User Interface Back Cards

Summary of the MGX 8850 Cards and Modules

OC-3 Uplink Back Cards

• MGX-MMF-4-155/B (multimode fiber uplink back card)

The MGX-MMF-4-155/B is a broadband network module for the PXM1 and provides four SONET OC-3/STM-1 ATM interfaces at 155 Mbps.

• MGX-SMFIR-4-155/B (single-mode fiber intermediate reach uplink back card)

The MGX-SMFIR-4-155/B is a broadband network module for the PXM1 and provides a single-mode, intermediate-reach, fiber optic SONET OC-3 interface that conforms to ANSI T1.105 and GR-253-CORE standards. This interface uses SC connectors. Redundant configurations are supported through SONET APS functionality (APS requires the “B” model).

• MGX-SMFLR-4-155/B (single-mode fiber long reach uplink back card)

The MGX-SMFLR-4-155/B is a broadband network module for the PXM1 and provides a single-mode, long-reach, fiber optic SONET OC-3 interface that conforms to ANSI T1.105 and GR-253-CORE standards. This interface uses SC connectors, and redundant configurations are supported through SONET APS functionality (APS requires the “B” model).

Service Resource Module (SRM)

OC-12 Uplink Back Cards

• MGX-SMFIR-1-622

The MGX-SMFIR-1-622 is a broadband network module for the PXM1 and provides a SONET OC-12/STM-4 ATM interface at 622 Mbps. APS requires the “B” model (SMFIR-1-622/B).

• MGX-SMFLR-1-622

The MGX-SMFLR-1-622 is a broadband network module for the PXM1 and provides a SONET OC-12/STM-4 ATM interface at 622 Mbps. APS requires the “B” model (SMFLR-1-622/B).

T3/E3 Uplink Back Cards

• MGX-BNC-2T3

The MGX-BNC-2T3 is a broadband network module for the PXM1 and provides two-T3 ATM interfaces.

• MGX-BNC-2E3

The MGX-BNC-2E3 is a broadband network module for the PXM1 and provides two-E3 ATM interfaces. Two versions of the BNC-2E3 card are available. The BNC-2E3A applies to Australia only. The BNC-2E3 applies to all other sites that require E3 lines on the PXM1 uplink card.

• Service Resource Module (MGX-SRM-3T3/C)

The optional SRM provides three major functions for service modules; bit error rate tester (BERT) of T1 and E1 lines and ports, loops back of individual Nx64 channels toward the customer premises equipment (CPE), and 1:N redundancy for the service modules.

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Summary of the MGX 8850 Cards and Modules

Table 1-3 MGX 8850 Modules and Cards (continued)

Modules Description

Frame Service Module (FRSM)

Chapter 1 Introducing the MGX 8850

Frame Service Modules

• Frame Service Module for eight T1 ports (AX-FRSM-8T1)

The AX-FRSM-8T1 provides interfaces for up to eight fractional T1 lines, each of which can support one-56 kbps or one-Nx64 kbps FR-UNI, FR-NNI port, ATM-FUNI, or a Frame forwarding port. The AX-FRSM-8T1 supports fractional and unchannelized T1 port selection on a per-T1 basis.

• Frame Service Module for eight E1 ports (AX-FRSM-8E1)

The AX-FRSM-8E1 provides interfaces for up to eight fractional E1 lines, each of which can support one-56 kbps or one-Nx64 kbps FR-UNI, FR-NNI, ATM-FUNI, or Frame forwarding port. The AX-FRSM-8E1 supports fractional and unchannelized E1 port selection on a per-E1 basis.

• Frame Service Module for eight channelized T1 ports (AX-FRSM-8T1-C)

The AX-FRSM-8T1-C allows full DS0 and nxDS0 channelization of the T1s and E1s, for a maximum of 192 ports per FRSM-8T1-C. Using the FRSM-8T1-C, up to 192 fully channelized T1 lines can be operated simultaneously on the Cisco MGX 8850 platform.

• Frame Service Module for eight channelized E1 ports (AX-FRSM-8E1-C)

The AX-FRSM-8E1-C allows full DS0 and n x DS0 channelization of the E1s, for a maximum of 248 ports per FRSM-8E1-C. Using the FRSM-8E1-C, up to 192 fully channelized E1 lines can be operated simultaneously on the Cisco MGX platform.

• Frame Service Module for T3 and E3 (MGX-FRSM-2E3T3)

The MGX-FRSM-2E3/T3 provides interfaces for two-T3 or two-E3 Frame Relay lines, each of which can support either two-T3 lines (each at 44.736 Mbps) or two-E3 lines (each at 34.368 Mbps) FR-UNI, ATM-FUNI, or Frame Forwarding port.

• Frame Service Module for channelized T3 (MGX-FRSM-2CT3)

The MGX-FRSM-2CT3 supports interfaces for two-T3 channelized Frame Relay lines. Each interface supports 56 Kbps, 64 Kbps, Nx56 Kbps, Nx64 Kbps, T1 ports for a total of 256 ports that can be freely distributed across the two T3 lines.

• Frame Service Module for high speed serial (MGX-FRSM-HS1/B)

The FRSM-HS1/B supports the 12-in-1 back card. This back card supports up to four V.35 or X.25 serial interfaces. This card also supports the two port HSSI back cards with SCSI-2 connectors.

• Frame Service Module for unchannelized HSSI (MGX-FRSM-HS2/B)

The MGX-FRSM-HS2/B supports interfaces for two unchannelized HSSI lines. Each interface supports approximately 51 Mbps; with both lines operating, maximum throughput is 70 Mbps.

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Table 1-3 MGX 8850 Modules and Cards (continued)

Modules Description

ATM U N I Service Module (AUSM)

Summary of the MGX 8850 Cards and Modules

ATM UNI Service Modules (AUSM)

• ATM UNI Service Module for T1 (MGX-AUSM/B-8T1)

The MGX-AUSM/B-8T1 provides interfaces for up to eight-T1 lines. You can group NxT1 lines to form a single, logical interface (IMA).

• ATM UNI Service Module for E1 (MGX-AUSM/B-8E1)

The MGX-AUSM/B-8E1 provides interfaces for up to eight-E1 lines. You can group NxT1 lines to form a single, logical interface (IMA).

Circuit Emulation Service Module (CESM)

Circuit Emulation Service Modules (CESM)

• Circuit Emulation Service Module for T1 (AX-CESM-8T1)

The AX-CESM-8T1 provides interfaces for up to eight-T1 lines, each of which is a 1.544 Mbps structured or unstructured synchronous data stream.

• Circuit Emulation Service Module for E1 (AX-CESM-8E1)

The AX-CESM-8E1 provides interfaces for up to eight-E1 lines, each of which is a 2.048-Mbps structured or unstructured synchronous data stream.

• Circuit Emulation Service Module for T3 and E3 (MGX-CESM-T3/E3)

The MGX-CESM-T3E3 provides direct connectivity to one T3 or E3 line for full-duplex communications at the DS3 rate of 44.736 MHz or at the E3 rate of

34.368 MHz. Each T3 or E3 line consists of a pair of 75-ohm BNC coaxial connectors, one for transmit data and one for receive data, along with three LED indicators for line status.

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Summary of the MGX 8850 Cards and Modules

Table 1-3 MGX 8850 Modules and Cards (continued)

Modules Description

Voice Interworking Service Module (VISM)

Chapter 1 Introducing the MGX 8850

Voice Interworking Service Modules (VISM)

• MGX-VISM-8T1 and MGX-VISM-8E1

These cards support eight T1 or E1ports for transporting digitized voice signals across a packet network. The VISM provides toll-quality voice, fax and modem transmission and efficient utilization of wide-area bandwidth through industry standard implementations of echo cancellation, voice-compression and silence-suppression techniques.

Note For configuration information on the Voice Interworking Service Module

(VISM), refer to the Cisco Voice Interworking Service Module Installation and Configuration and Configuration.

Route Processor Module (RPM)

• The RPM is a Cisco 7200 series router redesigned as a double-height card. Each

RPM uses two single-height back cards. The back card types are single-port Fast Ethernet, four-port Ethernet, and single-port (FDDI).

Note For information on availability and support of the MGX-RPM-128/B and

MGX-RPM-PR, refer to the Release Notes for Cisco WAN MGX 8850, MGX 8230, and MGX 8250 software.

Note For configuration information on the Route Processor Module (RPM),

refer to the Cisco MGX Route Processor Module Installation and Configuration Guide.

Redundancy for Service Modules

Service modules can have either 1:1 redundancy or 1:N redundancy.

Refer to the CiscoView user documentation for instructions on using the CiscoView application to configure redundancy.

1:1 Redundancy

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For 1:1 redundancy, place the card sets in adjacent slots and connect the appropriate Y-cable to the paired ports on the active and standby cards. Applicable service modules are

• MGX-FRSM-2CT3

• MGX-FRSM-2T3E3

• MGX-FRSM-HS2

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Hot Standby

For hot standby, place the card sets in the same shelf and connect the appropriate Y-cable to the paired ports on the active and hot standby cards. The hot standby card will automatically configure itself to match the configuration of the primary card. This process may take up to eight minutes. After the configuration transfer process is completed, the transfer from the primary to the hot standby card takes less that one second regardless of the number of connections. Any subsequent changes to the primary card are automatically transferred to the hot standby card configuration so the two cards maintain the same configuration. See the “Redundancy for Frame Service Modules” section on page 2-22 for instructions for setting up a redundant pair.

Applicable service modules are

• MGX-FRSM-2CT3

• MGX-FRSM-2T3E3

• MGX-FRSM-HS2

To determine the hot standby status of the system, enter the dsphotstandby command.

1:N Redundancy

Summary of the MGX 8850 Cards and Modules

For 1:N redundancy, an MGX Service Resource Module-3T3 (MGX-SRM-3T3/C) card set is necessary. This card set supports 1:N redundancy for the following service modules:

• MGX-AUSM-8T1/B

• MGX-AUSM-8E1/B

• AX-FRSM-8T1

• AX-FRSM-8E1

• AX-CESM-8T1

• AX-CESM-8E1

• MGX-VISM-8T1

• MGX-VISM-8E1

With 1:N redundancy, a group of service modules has one standby module. Redundancy by way of the redundancy bus on the MGX-SRM-3T3/C requires the redundant card group to have one of the following special back cards for redundancy support:

• R-RJ48-8T1-LM

• R-RJ48-8E1-LM

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Summary of the MGX 8850 Cards and Modules

Chapter 1 Introducing the MGX 8850

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Module and Service Descriptions

This chapter includes detailed descriptions of the modules, cards and services available with the MGX 8850:

• Processor Switching Module, page 2-1

• Service Resource Module, page 2-12

• ATM UNI Service Module (AUSM), page 2-15

• Frame Relay Service Modules, page 2-20

• Circuit Emulation Service Modules, page 2-45

• Voice Service—VISM, page 2-55

Processor Switching Module

CHAPTER

The PXM1 card set consists of the PXM1 front card, the PXM1 User Interface back card (PXM1-UI or PXM-UI-S3), and various uplink back cards that can serve as either a trunk or a UNI.

For physical details of PXM1 cards, see Appendix A, “System Specifications.”

Caution Handle the PXM1 front card very carefully to preserve the alignment of the attached disk drive. Do

not drop or bump the PXM1.

Caution Before using the MGX 8850, verify that the daughter card on the PXM1 corresponds to the uplink

card type. Serious damage may result if the power is on and these cards are mismatched.

Note If you accidentally insert a back card for a service module into slot 7, 8, 23, or 24, carefully remove

the back card and check for bent or damaged pins on the backplane and the back card.

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Processor Switching Module

PXM1 Features

The PXM1 (see Figure 2-1) is a combination ATM switching fabric, data processing, and ATM interface card. This module combines a 1.2 Gbps shared-memory switching fabric with integrated trunking at speeds up to OC-12. The switching fabric provides 1.2 Gbps of non-blocking switching capacity, while the processor provides the control plane that delivers IP+ATM networking software, diagnostics, and performance monitoring.

The PXM provides integrated switching, processing, and broadband interfaces to provide the following high-performance switching and trunking features:

Note APS is available only for the “B” models of the OC-3 and OC-12 uplink cards.

Chapter 2 Module and Service Descriptions

• 1.2-Gbps non-blocking switching

• Integrated T3/E3, OC-3c/STM-1, OC-12c/STM-16

• ATM trunking

• Linear Automatic Protection Switching for the SONET interfaces.

• Hot card insertion/removal

• 1:1 hot standby redundancy

• User-selectable primary and secondary clock sources with graceful switchover

• Internal Stratum-4 or optional Stratum-3, external BITS, or inband clock sources

• Inband management or out-of-band via EIA/TIA-232 or 10BaseT control ports

• Narrowband service modules

• Broadband trunking support

• DSO to OC-12c/STM-4 interfaces supported

PXM1 Illustration and LED Description

PXM1 provides connectors for external audio and visual alarms. The interface can either be always open or always closed. Major and minor alarms are controlled separately. An alarm cutoff button is accessible from the front. A history LED is set when the alarm cutoff button is pressed. The history LED can be cleared by pressing the history clear button on the faceplate.

The PXM1 provides the following indicators:

• System Status Active/Standby/Fail/standby update (green/yellow/red/flashing yellow)

• Critical alarm (blue)

• Major alarm (red)

• Minor alarm (yellow)

• DC OK A (green = OK, red = not OK)

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• DC OK B (green = OK, red = not OK)

• ACO (green)

• History (green)

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• Port Activity Active and Clear/Remote alarm/ Local alarm (green/yellow/ red)

• LAN activity (flashing green)

Figure 2-1 PXM1 Front Card

Processor Switching Module

PXM1 User Interface Back Cards

The PXM1 User Interface (PXM1-UI) back card provides ports for communication and control. This card is also used to connect the system to an external clocking source. Install this card in the upper half of the back of the PXM1. See the “User Interface Access Ports” section on page 5-2 for more information on the PXM1 back card ports.

There are two options for the PXM1 User Interface back card:

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Processor Switching Module

1. PXM1-UI (standard)

The PXM1-UI back card shown in Figure 2-2 provides

• One RJ-45/48 for external T1 or E1 clock input

• One BNC connector for E1 clock input

• One DB-15 female connector for alarm interface

• Maintenance, control and LAN ports.

2. PXM-UI-S3 (optional)

The PXM-UI-S3 back card shown in Figure 2-3 provides Stratum-3 clocking:

• One RJ-45/48 connector for external T1 or E1 clock input (CLK1).

• One DB-15 female connector for alarm interface (Alarm).

• Maintenance, control and LAN ports.

Chapter 2 Module and Service Descriptions

Note The LAN2 and CLK2 ports on the PXM-UI-S3 are not supported in this release. All external

connections are made with the LAN1 and CLK1 ports.

Making External Clock Connections

If external equipment or a local digital central office is to provide synchronization, the external clock source is connected to the PXM1-UI or PXM-UI-S3 back card.

Stratum-4 clocking

External clocking sources are connected to the PXM1-UI back card (see Figure 2-2).

• One RJ-45/48 connector for external T1 or E1 clock input.

• One BNC connector for E1 clock input.

Stratum-3 clocking

External clocking sources are connected to the PXM-UI-S3 back card (see Figure 2-3).

For T1 and E1 Stratum-3 external clock input, connect the source to the RJ-45/48 connector labeled “CLK1.”

2-4

Note The LAN2 and CLK2 ports on the PXM-UI-S3 are NOT supported in this release. All external

connections are made with the LAN1 and CLK1 ports.

See Chapter 5, “Configuring the MGX 8850 Shelf” for information on configuring an external clocking source.

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Chapter 2 Module and Service Descriptions

PXM1 Back Card Illustrations

This section contains illustrations of the following PXM1 cards:

• Figure 2-1: PXM1 Front Card

• Figure 2-2: User Interface Back Card (PXM1-UI)

• Figure 2-3: User Interface Back Card (PXM-UI-S3): Stratum-3 Clocking

• Figure 2-4: OC-12 Long-Reach Back Card (SMFLR-1-622/B)

• Figure 2-5: OC-12 Intermediate-Reach Back Card (SMFIR-1-622/B)

• Figure 2-6: OC-3 Four-Port Back Card (SMF-155/B)

• Figure 2-7: Two-port T3 Back Card (BNC-2T3)

• Figure 2-8: Two-port E3 Back Card (BNC-2E3)

PXM1 User Interface Back Cards

See the “PXM1 User Interface Back Cards” section on page 2-3 for descriptions of the features available with the PXM1 User Interface back cards.

Processor Switching Module

Figure 2-2 User Interface Back Card (PXM1-UI)

PXM1-UI

C L O C K

M P

C P

L A N

T1 clock

Maintenance port

Control port

LAN port

E1 clock source

E1 CLOCK

A L A R M

Alarm outputs

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Figure 2-3 User Interface Back Card (PXM-UI-S3): Stratum-3 Clocking

C P

M P

L A N

PXM

UI-S3

EXT CLK 1

EXT CLK 2

Chapter 2 Module and Service Descriptions

Control port

Maintenance port

LAN 1 port

LAN 2 port (not supported in this release)

External Clock 1 (connection for T1 and E1 external clock sources)

External Clock 2 (not supported in this release)

Alarm Output Connection

Dry contact relay closures are available for forwarding MGX 8850 alarms to an alarm system. Separate visual and audible alarm outputs are available for major and minor alarm outputs. The MGX 8850 alarm outputs are available on a DB-15 connector on the PXM-UI-S3 back card faceplate. See Appendix B,

“Cabling Summary,” for the pinouts on this connector. Use the switchboard cable for running these

connections.

L A R M

Alarm port

46010

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SMFLR-1-622 Back Card

An illustration of the long-reach OC-12 card appears in Figure 2-4. For specifications on this card, see

Appendix A, “System Specifications.” Note that Automatic Protection Switching (APS) requires the “B”

model—an SMFLR-1-622/B.

Figure 2-4 OC-12 Long-Reach Back Card (SMFLR-1-622/B)

SMFLR-1-622

ENABLED

Processor Switching Module

SIGNAL

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Processor Switching Module

SMFIR-1-622 Back Card

The intermediate-reach OC-12 back card appears in Figure 2-5. For specifications on this card, refer to

Appendix A, “System Specifications.” Note that Automatic Protection Switching (APS) requires the “B”

model—an SMFIR-1-622/B.

Figure 2-5 OC-12 Intermediate-Reach Back Card (SMFIR-1-622/B)

SMFIR-1-622

ENABLED

Chapter 2 Module and Service Descriptions

SIGNAL

66964

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Chapter 2 Module and Service Descriptions

SMF-155 Back Card

The SMF-155 back card provides a physical single-mode fiber optic SONET OC-3 interface that conforms to ANSI T1.105 and GR-253-CORE standards. This interface uses SC connectors, and redundant configurations are supported through Y-cables. For specifications on this card, see

Appendix A, “System Specifications.” Note that Automatic Protection Switching (APS) requires the “B”

model—an SMF-155/B.

Figure 2-6 OC-3 Four-Port Back Card (SMF-155/B)

SC-4-155

ENABLED

SIGNAL

P O R T

SIGNAL

P O R T

SIGNAL

P O R T

SIGNAL

P O R T

Processor Switching Module

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Processor Switching Module

BNC-2T3 Back Card

The BNC-2T3 back card provides two T3 ports.

For card specifications, refer to Appendix A, “System Specifications.”

Figure 2-7 Two-port T3 Back Card (BNC-2T3)

Chapter 2 Module and Service Descriptions

BNC-2T3

SIGNAL

PORT 1

SIGNAL

PORT 2

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BNC-2E3 Back Card

Two versions of the BNC-2E3 card are available. The BNC-2E3A applies to Australia only, and the BNC-2E3 applies to all other sites that require E3 lines on the PXM1 uplink card. An illustration of the two-port E3 back card appears in Figure 2-8. For specifications on this card, see Appendix A, “System

Specifications.”

Figure 2-8 Two-port E3 Back Card (BNC-2E3)

BNC-2E3

SIGNAL

Processor Switching Module

PORT 1

SIGNAL

PORT 2

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Service Resource Module

A service resource module (SRM) provides three main functions for the service modules:

• Bit Error Rate Testing

• 1:N Service Module Redundancy

• Bulk Distribution Mode

See Figure 2-9 for an illustration of the MGX-SRM-3T3/C front card and the MGX-BNC-3T3-M back card.

Bit Error Rate Testing

After a service module line or port is put into loopback mode, the SRM can generate a test pattern over the looped line or port, read the received looped data, and report on the error rate. This operation can be performed on a complete T1 or E1 line, on a fractional T1 or E1 line, on a SD0 bundle (nxDS0), or on a single DS0 channel. The SRM can support bit error rate testing (BERT) only one line or channel at a time. BERT is capable of generating a variety of test patterns, including all ones, all zeros, alternate one zero, double alternate one zero, 223-1, 220-1, 215-1, 211-1, 29-1, 1 in 8, 1 in 24, DDS1, DDS2, DDS3, DDS4, and DDS5.

Chapter 2 Module and Service Descriptions

1:N Service Module Redundancy

Service module redundancy provides 1:N redundancy for multiple groups of service modules (a group consists of N active and one standby service module). The redundant service module in a group must be a superset (with respect to functionality) of the cards. Upon the detection of a failure in any of the service modules, the packets destined for the failed service module are carried over the CellBus to the SRM in its chassis. The SRM receives the packets and switches them to the backup service module via the cellbus.

Bulk Distribution Mode

Each of the T3 ports can be used to support up to 28-multiplexed T1 lines, which are distributed to T1 service module ports in the switch. Called bulk distribution, this feature is performed when the SRM is in “bulk mode.” The purpose of this feature is to allow large numbers of T1 lines to be supported over three T3 lines rather than over individual T1 lines.

Out of the maximum possible 84 T1 channels (3 times 28), up to 80 channels per shelf can be active at any time. Any T1 channel in a T3 line can be distributed to any eight port on a service module in any slots of the shelf without restriction. Each MGX 8850 shelf can support up to 80 T1/E1s, and the whole chassis supports up to 160 T1s. As an option, the SRMs can use back cards and native T1/E1 interfaces to bring the total to 192 DS1s; 160 DS1s using twenty 8-port cards and the SRMs, and 32 DS1s using four 8-port cards with T1/E1 back cards (for the MGX 8850).

The SRM-3T3 can also be operated in “nonbulk mode” on a port-by-port basis. For a port configured in nonbulk mode, bulk distribution is disabled and the SRM provides BERT and 1:N redundancy functions only.

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Linking the MGX-SRM-3T3/C to a destination card causes the switch to take CPE traffic through the MGX-SRM-3T3/C rather than the T1 card’s line module. Linkage is a card-level condition. If you link just one T1 channel on a service module to the MGX-SRM-3T3/C, the back card on the service module becomes inoperative. If you want them to operate, you must link all other T1 ports on that service module to the MGX-SRM-3T3/C.

Module Requirements with Bulk Distribution and Redundancy

The use of bulk distribution affects the requirements for SRM and service module back cards as follows.

• With bulk distribution and 1:N redundancy support by way of the distribution bus, the service

modules do not use back cards.

• For 1:N redundancy by way of the redundancy bus, the supported service modules must have back

cards—including one special redundancy back card. E1 redundancy requires the AX-R-RJ48-8E or AX-R-SMB-8E1 line module, and T1 redundancy requires the R-RJ48-8T1 line module.

• For bulk distribution, the T3 lines connect to an external multiplexer. The T1 lines on the other side

of the multiplexer connect to the CPE. The SRM converts the received traffic from its T3 lines to T1 channels and sends the data to linked service modules. For instructions on linking T1 channels and card slots to the MGX-SRM-3T3/C, see Chapter 6, “Card and Service Configuration”

Service Resource Module

Installation Requirements for the MGX-SRM-3T3/C

The following card-level characteristics apply to any SRM installation:

• The MGX-SRM-3T3/C and supported service modules must be in the same (top or bottom) bay.

• A nonredundant setup requires an MGX-SRM-3T3/C in slot 15 for the upper bay or slot 31 for

redundancy in the lower bay. The PXM1 in slot 7 controls the SRMs in slots 15 and 31.

• An optional, redundant PXM1 in slot 8 controls the redundant SRMs in slots 16 and 32.

• If the MGX 8850 has one or two primary SRMs for the primary PXM1 and the switch also has a

redundant PXM1, it must have a redundant SRMs. Therefore, the switch can use one, two, or four MGX-SRM-3T3/Cs.

• The distribution bus does not support slots 9, 10, 25, and 26. Any service module that uses bulk

distribution or relies on the distribution bus for redundancy cannot reside in these slots.

SRM Illustration and LED Indicators

Table 2-1 contains SRM-3T3 LED faceplate indicators descriptions.

Table 2-1 LED Indicators for the SRM-3T3/C

Type of LED Color Meaning

ACT Green Indicates card set is in active mode.

STBY Yellow Indicates card set is in standby mode.

FAIL Red Indicates BNM-155 card set has failed or the line

module is missing.

1:N RED Green On indicates 1:N redundancy has been invoked.

Off indicates 1:N redundancy is not active.

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Table 2-1 LED Indicators for the SRM-3T3/C (continued)

Type of LED Color Meaning

BERT Green On indicates BERT function is active.

PORT Green Active, OK.

Red Active, local alarm.

Yellow Active, remote alarm.

Figure 2-9 MGX-SRM-3T3/C Card Set

BNM 3T3 M

CLEI Code Label

ACT

STBY

FAIL

1:N RED

BERT

PORT1

PORT2

PORT3

SRM

3T3

Front card Back card

S6181

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Chapter 2 Module and Service Descriptions

ATM UNI Service Module (AUSM)

The main function of the AUSM cards is to provide an ATM UNI/NNI interface at T1 or E1 rates so that ATM UNI user devices can transmit and receive traffic. This section contains the following information:

• AUSM Features, page 2-15

• AUSM/B Front Card Illustration and LED Description, page 2-17

• Back Cards for the AUSM/B, page 2-18

AUSM Features

The MGX-AUSM-8T1/B and MGX-AUSM-8E1/B (AUSM) are multipurpose front cards that use an eight-port T1 or E1 back card to provide native ATM UNI interfaces.

A single AUSM/B card can provide hot standby redundancy for all active AUSM/B cards of the same type (1:N redundancy).

AUSM/B modules are supported by standards-based management tools, including Simple Network Management Protocol (SNMP), Trivial File Transfer Protocol (TFTP) for configuration and statistics collection, and a command line interface. The Cisco WAN Manager provides full graphical user interface support for connection and equipment management.

ATM UNI Service Module (AUSM)

Quality of Service (QoS) Management

Consistent with the Cisco intelligent quality of service (QoS) management features, AUSM/B cards support per-VC queuing on ingress and multiple class of service queues on egress. AUSM/B cards fully support continuous bit rate (CBR), variable bit rate (VBR), unspecified bit rate (UBR), and available bit rate (ABR) service classes.

Inverse Multiplexing

AUSM/B cards also support ATM Forum-compliant inverse multiplexing for ATM(IMA). This capability enables multiple T1 or E1 lines to be grouped into a single high-speed ATM port. This nxT1 and nxE1 capability fills the gap between T1/E1 and T3/E3, providing bandwidth up to 12 Mbps (nxT1) or 16 Mbps (nxE1), without requiring a T3/E3 circuit.

Inverse Multiplexing for ATM

• ATM Forum 1.0-compliant inverse multiplexing for ATM (IMA)

• Support for differential delays of up to 200 milliseconds across the constituent T1s

and E1s of an IMA group

• With IMA disabled, each T1 or E1 interface configured as a single port running at full line rate

• With IMA, any group of nxT1s or nxE1s can support an nxT1 or nxE1 port

• With IMA, multiple IMA ports of any configuration supported per card (a specific T1 or E1 line can

be in only one T1/E1 or IMA port at a time)

• Upon T1/E1 circuit failure, an IMA port automatically adjusts to continue operation over remaining

circuits

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ATM UNI Service Module (AUSM)

Physical Layer Features

Table 2-2 shows the physical layer features for all cards, T1 cards, and E1 cards.

Table 2-2 Physical Layer Features

Card Type Feature

All cards

T1 cards

Chapter 2 Module and Service Descriptions

• Transmitter is loop-timed to receiver or synchronized to shelf

• Loop-up, loop-down pattern generation and verification

• Transmission convergence sublayer functions per ITU G.804

• LCV, LES, LSES, CV, ES, SES, SEFS, AISS, UAS

performance statistics

• Bit rate error test (BERT) and extended loopback pattern

generation/verification (with optional SRM)

• 1:N redundancy within a group of n+1 AUSM/B cards of same

type on a shelf (with optional SRM)

• LOS, OOF, AIS, RAI alarms

• Eight T1 (1.544 Mbps +/–50 bps) lines per card

• B8ZS or AMI line coding

E1 cards

• ANSI T1.408 extended Super Frame format line framing

• ANSI T1.408 support for detection and display of received T1

ESF loopback codes on extended Super Frame (ESF) data link

Cell transfer capacity 3623 cells/sec per T1

• Eight E1 (2.048 Mbps +/–50 bps) lines per card

• HDB3 or AMI line coding

• ITU G.704 16-frame multiframe line framing and clear channel

for E1

• BERT and extended loopback pattern generation/verification

(with optional SRM)

Cell transfer capacity 4528 cells/sec per E1 (G.704), 4830 cells/sec per E1 (clear channel)

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Chapter 2 Module and Service Descriptions

AUSM/B Front Card Illustration and LED Description

The AUSM/B front card oversees all major functions of the ATM interface. It contains firmware for both the T1 and the E1 line interfaces and downloads from the PXM1 the appropriate code when it recognizes the back card type. An illustration of an eight-port AUSM/B front card appears in Figure 2-10. For specifications on this card, see Appendix A, “System Specifications.”

Figure 2-10 AUSM/B-8T1 or AUSM/B-8E1 Front Card

CLEI Code Label

ATM UNI Service Module (AUSM)

ACT

STBY

FAIL

PORT 1

PORT 2

PORT 3

PORT 4

PORT 5

PORT 6

PORT 7

PORT 8

AUSM

8T1/E1

Front card

S6183

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ATM UNI Service Module (AUSM)

Table 2-3 contains a list of eight-port LED indicators:

Table 2-3 Eight-Port AUSM-B LED Indicators

LED Color Description

ACT Green On indicates the card set is in active mode.

STBY Yellow

FAIL Red

PORT Green Green indicates the port is active.

Chapter 2 Module and Service Descriptions

• Slow blink with Active LED off means the card is in the boot state.

• Fast blink with Standby LED on means card is receiving firmware.

• Fast blink indicates the service module is passing BRAM channel

information to the PXM1.

• Steady yellow indicates the card is in Standby mode and the firmware

is executing ADMIN code.

• Steady Red with Active and Standby LEDs off indicates either the card

is in the Reset condition, the card has failed, or the card set is not complete (no line module).

• Steady Red with Active LED on indicates the card was active prior to

failing.

• Steady Red with Standby LED on indicates the card was standby prior

to failing.

Red Red indicates a local alarm on the port.

Yellow Yellow indicates a remote alarm on the port.

Off indicates the port has not been activated (upped).

Back Cards for the AUSM/B

The MGX-AUSM-8T1/B and MGX-AUSM-8E1/B use the generic eight-port T1 or E1 line modules that operate with the eight-port service modules (see Figure 2-11).

• AX-RJ48-T1: provides eight RJ-48 connectors for T1 lines.

• AX-RJ48-E1: provides eight RJ-48 connectors for E1 lines.

• AX-SMB-E1: provides eight pairs of SMB connectors for E1 lines.

1:N Redundancy support for the AUSM requires the special versions of the RJ-45 back cards (see

Figure 2-11). These back cards are

• AX-R-RJ48-T1

• AX-R-RJ48-E1

• AX-R-SMB-E1

Note Redundancy support differs for the MGX-AUSM-8T1/B and MGX-AUSM-8E1/B. For details on the

requirements for redundancy through an MGX-SRM-3T3/C, see the ““Service Resource Module”

section on page 2-12.”

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Figure 2-11 RJ-48 and SMB Back Cards for the MGX-AUSM-8T1E1/B

ATM UNI Service Module (AUSM)

RJ48-8E1

RX1

TX1

RX2

TX2

RX3

TX3

RX4

TX4

RX5

TX5

RX6

TX6

RX7

RJ48-8T1

RJ48-8E1

SMB-8E1

T1 RJ48

back card

E1 RJ48 back card

TX7

RX8

TX8

E1 SMB

back card

T1 RJ48

redundant

8-port

back card

E1 RJ48

redundant

8-port

back card

18739

E1 SMB

redundant

8-port

back card

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Frame Relay Service Modules

The primary function of the Frame Relay Service Modules (FRSM) is to convert between the Frame Relay formatted data and ATM/AAL5 cell-formatted data. For an individual connection, you can configure network interworking (NIW), service interworking (SIW), ATM-to-Frame Relay UNI (FUNI), or frame forwarding. An FRSM converts the header format and translates the address for

• Frame Relay port number and DLCI

• ATM-Frame UNI (FUNI) port number and frame address or frame forwarding port

• ATM virtual connection identifier (VPI/VCI)

See “Configuring Frame Relay Service” section on page 6-29 for instructions to configure the FRSMs.

This section contains the following information:

• Features Common to All FRSMs, page 2-20.

• Rules for FRSM Slot Installation, page 2-22.

• Redundancy for Frame Service Modules, page 2-22.

• Connection Types on the FRSM, page 2-23.

• Types of Frame Service Modules, page 2-27.

–

FRSMs for T1 and E1 Lines, page 2-28.

Chapter 2 Module and Service Descriptions

–

FRSMs for T3 and E3 lines, page 2-32.

–

FRSMs for Serial Connections, page 2-38.

Features Common to All FRSMs

This section describes features common to all FRSMs. For features specific to the individual module types, see “Types of Frame Service Modules” section on page 2-27. For information to configure the FRSMs, see Chapter 6, “Card and Service Configuration”.

Data-Link Layer Features

• Each logical port on an FRSM independently configurable to run Frame Relay UNI, Frame Relay

NNI, ATM FUNI, or frame forwarding.

• 7E flags used to delineate frames (with bit stuffing to prevent false flags) and for interframe gaps.

• One flag between frames is considered valid upon receipt.

• Supports configuration of one- or two-flag minimum interframe gap for transmission.

• Valid frame sizes from 5 up to 4510 octets.

Frame Relay Features

2-20

• Each logical port independently configurable as Frame Relay UNI or Frame Relay NNI.

• Meets ANSI T1.618, using two-octet headers.

• Interpreted CCITT-16 CRC at end of the frame (frame discard if in error).

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• Supports ITU-T Q.933 Annex A, ANSI T1.617 Annex D, and LMI local management for

semipermanent virtual circuits (both UNI and NNI portions); enhanced LMI provides autoconfiguration of traffic management parameters for attached Cisco routers.

• Frame Relay-to-ATM network interworking (FRF.5) and Frame Relay-to-ATM service interworking

(FRF.8), both transparent and translation modes, configured on a per-permanent virtual circuit (PVC) basis.

• Standards-based CIR policing and DE tagging/discarding.

• End-to-end ForeSight rate-based flow control option.

• Capability to extend ForeSight closed-loop congestion management between two Cisco networks

across Frame Relay-UNI or Frame Relay-NNI using ANSI T1.618 consolidated link-layer management (CLLM) messages.

• Support for high-priority, rt-VBR, nrt-VBR, VBR, and ABR-ForeSight QoS.

Note The Foresight option is not available on MGX-FRSM-HS1/B.

ATM FUNI Features

Frame Relay Service Modules

• ATM Forum FUNI mode 1A supported.

• Interpreted CCITT-16 CRC at end of the frame (frame discard if in error).

• AAL5 mapping of user payload to ATM.

• Supports 16 VPI values (15 plus the zero VPI); supports virtual path connections (VPCs) for all

nonzero VPI values (up to 15 VPCs).

• Supports 64 VCI value.s

• Supports OAM frame/cell flows.

• Standards-based usage parameter control.

• Support for high-priority, rt-VBR, nrt-VBR, VBR, and ABR-ForeSight QoS. Note: the Foresight

option is not available on MGX-FRSM-HS1/B.

Frame Forwarding Features

• No assumptions made on the frame header format.

• Interpreted CCITT-16 CRC at end of the frame (with frame dropping on an error).

• If a connection is set up, all frames are routed to/from that connection; otherwise the frame is

discarded.

• No translation/mapping attempted between frame header bits and ATM layer EFCI and DE bits.

• A single set of Frame Relay traffic access parameters (for example, CIR) is configured for the

logical port in frame-forwarding mode; all arriving frames are treated as if they arrived without a set DE bit; if the frame is determined to exceed the committed rate (exceeding CIR), the CLP of all cells associated with that frame are set to indicate low priority; if the frame exceeds the total rate allowed for committed and uncommitted traffic, the frame is discarded.

• Support for high-priority, rt-VBR, nrt-VBR, VBR, and ABR-ForeSight QoS.

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Frame Relay Service Modules

Note The Foresight option is not available on MGX-FRSM-HS1/B.

Rules for FRSM Slot Installation

Slot allocation for the FRSM should adhere to the following rules.

• An FRSM can reside in any slot except 7, 8, 15, 16, 31, and 32.

• Any card for which you specify 1:N redundancy through the redundancy bus and the

MGX-SRM-3T3/C cannot go in slot 9, 10, 25, or 26.

• Whenever possible, the VHS cards should go in the upper bay of the card cage because the upper

half of the backplane provides higher bandwidth at each slot.

Note The MGX-FRSM-HS1/B does not support redundancy, so redundancy is not a consideration for

deciding on a slot for the card. Nevertheless, the MGX-FRSM-HS1/B should be installed in the lower bay due to cell bus speed.

Chapter 2 Module and Service Descriptions

Redundancy for Frame Service Modules

FRSMs can have either hot standby, 1:1 redundancy, or 1:N redundancy.

• For 1:1 redundancy, a Y-cable is necessary.

• MGX-FRSM-2CT3, MGX-FRSM-2T3E3, and MGX-FRSM-HS2 use 1:1 Y-cable redundancy.

• For 1:N redundancy, an MGX-SRM-3T3/C is required (no Y-cabling).

• Differences may exist in the way the MGX-SRM-3T3/C supports redundancy for a particular T1 or

E1 configuration.See the “Service Resource Module” section on page 2-12” and the Chapter 6,

“Card and Service Configuration” Service Resource Module description

Note The MGX-FRSM-HS1/B does not support redundancy.

Hot Standby

For hot standby, place the card sets in slots on the same card shelf and use an appropriate Y-cable to connect each hot standby pair. To view the hot standby status of the system, enter the dsphotstandby command.

1:1 Redundancy

For 1:1 redundancy, place the card sets in adjacent slots and connect a Y-cable for each pair of active and standby ports. On the CLI, configure the card for redundancy by entering the addred command. For instructions on how to use the CiscoView application to configure redundancy, refer to the CiscoView documentation.

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1:N Redundancy

1:N redundancy for the eight-port FRSMs requires an MGX-SRM-3T3/C. With 1:N redundancy, a group of service modules includes one standby module. For installation requirements, see the “Service

Resource Module” section on page 2-12”. For configuration requirements, see Chapter 6, “Card and Service Configuration” MGX-SRM-3T3/C section.

Connection Types on the FRSM

The following sections describe NIW, SIW, FUNI, and Frame forwarding. Topics include translation and congestion management.

• Frame Relay-to-ATM Service Interworking, page 2-24

• ATM Frame-to-User Network Interface, page 2-27

• Frame Forwarding, page 2-26

Frame Relay-to-ATM Network Interworking

Frame Relay Service Modules

Frame Relay-to-ATM network interworking (NIW) supports a permanent virtual connection (PVC) between two Frame Relay users over a Cisco network or a multi-vendor network. The traffic crosses the network as ATM cells. To specify NIW for a connection, add the connection with a channel type of “network interworking.” For an illustration of a BPX 8620 network with NIW connections, see

Figure 2-12.

Figure 2-12 BPX 8620 Network with NIW Connections

FRAD

(router)

Frame Relay

DS1

FRSM

Congestion Indication for NIW Connections

MGX 8850

BPX 8620 network

PVCs

MGX 8850

Frame Relay

MGX 8850

Frame Relay

FRSM

DS1

FRSM

FRAD

(router)

DS1

FRAD

(router)

17908

In addition to frame-to-cell and DLCI to VPI/VCI conversion, the network interworking feature maps cell loss priority (CLP) and congestion information from Frame Relay to ATM formats. The CLP and congestion indicators can be modified for individual connections using the cnfchanmap command.

Frame Relay–to–ATM Direction

Each Frame Relay-to-ATM network interworking connection can be configured as one of the following DE to CLP mapping schemes:

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Frame Relay Service Modules

Congestion Indication

Chapter 2 Module and Service Descriptions

• DE bit in the Frame Relay frame is mapped to the CLP bit of every ATM cell generated by the

segmentation process.

• CLP is always 0.

• CLP is always 1.

ATM–to–Frame Relay Direction

Each Frame Relay to ATM network interworking connection can be configured as one of the following CLP to DE mapping schemes:

• If one or more ATM cells belonging to a frame has its CLP field set, the DE field of the Frame Relay

frame will be set.

• No mapping from CLP to DE.

Congestion on the Frame Relay to ATM network interworking connection is flagged by the EFCI bit. The setting of this feature is dependent on traffic direction, as described below.

Frame Relay–to–ATM Direction

EFCI is always set to 0.

ATM–to–Frame Relay Direction

If the EFCI field in the last ATM cell of a segmented frame received is set, then FECN of the Frame Relay frame will be set.

PVC Status Management

The management of the ATM layer and the FR PVC status management can operate independently. The PVC status from the ATM layer is used when determining the status of the FR PVC. However, no direct actions of mapping LMI A bit to OAM AIS is performed.

Frame Relay-to-ATM Service Interworking

By specifying “service interworking” as the channel type when adding a Frame Relay PVC to an FRSM, all PVC data is subject to service interworking translation and mapping in both the Frame Relay–to–ATM and ATM–to–Frame Relay directions. An illustration of typical SIW connections is shown in Figure 2-13.

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Figure 2-13 BPX 8600 Series Network with SIW Connections

Frame Relay Service Modules

ATM FUNI CPE

ATM UNI CPE

T1 or E1

FRSM

RPM

MGX 8850

BPX 8620 network

PVCs

BPX 8620

B X M

T3, E3, OC3

ATM-UNI CPE

MGX 8850

FRSM

FR UNI

CPE

In Figure 2-13, an MGX 8850 node on the right has three-Frame Relay SIW connections terminating on an FRSM. Three far-end terminations for these connections appear in other parts of Figure 2-13

• ATM FUNI (framed UNI) port on an FRSM

• ATM UNI port on an RPM

• ATM UNI port on a BPX 8600 series BXM card

In addition to frame-to-cell and DLCI-to-VPI/VCI conversion, SIW maps cell loss priority and congestion data between the Frame Relay and ATM formats and is FRF.8-compliant. It provides full support for routed and bridged PDUs, transparent and translation modes, and VP translation.

17909

Cell Loss Priority

In addition to frame-to-cell and DLCI-to-VPI/VCI conversion, the SIW feature maps cell loss priority (CLP) and congestion information from Frame Relay-to-ATM formats and is FRF.8-compliant. It provides full support for routed and bridged PDUs, transparent and translation modes, and VP translation. The CLP and congestion parameters can be modified for individual connections with the cnfchanmap command.

Frame Relay–to–ATM Direction

Each Frame Relay- to-ATM service interworking connection can be configured as one of the following Discard Eligibility (DE) to cell loss priority (CLP) schemes:

• DE bit in the Frame Relay frame is mapped to the CLP bit of every ATM cell generated by the

segmentation process of the frame.

• CLP is always 0.

• CLP is always 1.

ATM–to–Frame Relay Direction

Each Frame Relay-to-ATM service interworking connection can be configured as one of the following CLP to DE mapping schemes:

• If one or more ATM cells belonging to a frame has its CLP set, the DE field of the Frame Relay

frame will be set.

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Frame Relay Service Modules

Congestion Indication

Chapter 2 Module and Service Descriptions

• DE is always 0.

• DE is always 1.

Setting up the cell loss priority option is accomplished through the MGX 8850 cnfchanmap (configure channel map) command.

Frame Relay–to–ATM Direction

Each Frame Relay-to-ATM service interworking connection can be configured as one of the following Forward Explicit Congestion Notification (FECN) to Explicit-Forward Congestion Indicator (EFCI) schemes:

• FECN bit in the Frame Relay frame is mapped to the EFCI bit of every ATM cell generated by the

segmentation process of the frame.

• EFCI is always 0.

• EFCI is always 1.

ATM–to–Frame Relay Direction

Frame Relay– to–ATM service interworking connections use the following EFCI to FECN/BECN mapping schemes:

• If the EFCI bit in the last ATM cell of a segmented frame received is set to 1, the FECN of the Frame

Relay frame will be set to 1.

• BECN is always set to 0.

• Setting up the congestion indication option is accomplished through the cnfchanmap (configure

channel map) command.

Command and Response Mapping

Command/Response Mapping is provided in both directions.

Frame Relay–to–ATM Direction

The FRSM maps the C/R bit of the received Frame Relay frame to the CPCS-UU least-significant bit of the AAL5 CPCS PDU.

ATM to Frame Relay Direction

• The least-significant bit of the CPCS-UU is mapped to the C/R bit of the Frame Relay frame.

Translation and Transparent Modes

Each service interworking (SIW) connection can exist in either translation or transparent mode. In translation mode, the FRSM translates protocols between the FR NLPID encapsulation (RFC 1490) and the ATM LCC encapsulation (RFC 1483). In transparent mode, the FRSM does not translate. Translation mode support includes address resolution by transforming address resolution protocol (ARP, RFC 826) and inverse ARP (inARP, RFC 1293) between the Frame Relay and ATM formats.

Frame Forwarding

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The FRSM card can be configured as “Frame Forwarding” on a port-by-port basis.

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Frame forwarding operates the same as standard Frame Relay except that the FRSM:

• The 2-byte Q.922 header is not assumed/interpreted.

• All frames received are mapped to a specific connection if it exists. Otherwise, the frames are

dropped.

• No DE/CLP or FECN/EFI mapping is performed.

• “Illegal header count” and “Invalid DLCI” statistics are not kept.

• “Discarded frame count due to no connection” statistic is kept.

ATM Frame-to-User Network Interface

All FRSMs support the ATM Frame-based User-to-Network Interface (FUNI). When a frame arrives from the FUNI interface, the FRSM removes the 2-byte FUNI header and segments the frame into ATM cells by using AAL5. In the reverse direction, the FRSM assembles ATM cells from the network into a frame by using AAL5, adds a FUNI header to the frame, and sends it to the FUNI port.

Loss Priority Indication

Frame Relay Service Modules

Loss Priority Indication mapping is provided in both directions:

FUNI-to-ATM Direction

The CLP bit on the FUNI header is mapped to the CLP bit of every ATM cell that is generated for the FUNI frame.

ATM-to-FUNI Direction

CLP bit in the FUNI header is always set to 0.

Congestion Indication

Congestion Indication mapping is provided in both directions

FUNI-to-ATM Direction

EFCI is set to 0 for every ATM cell generated by the segmentation process.

ATM-to-FUNI Direction

If the EFCI field in the last ATM cell of a received segmented frame is set to 1, the CN bit in the FUNI header is set to 1. The two reserve bits (the same positions as C/R and BECN in Frame Relay header) are always set to 0.

Types of Frame Service Modules

There are three types of FRSMs:

• FRSMs for T1 and E1 Lines, page 2-28.

• FRSMs for T3 and E3 lines, page 2-32.

• FRSMs for Serial Connections, page 2-38.

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Frame Relay Service Modules

Note For hardware and other specifications on the FRSMs, see Appendix A, “System Specifications.” For

descriptions of how to configure the card, lines, and ports and add Frame Relay connections, refer to

Chapter 6, “Card and Service Configuration”.

FRSMs for T1 and E1 Lines

The eight-port FRSMs for T1 or E1 lines support channelized or unchannelized service. These cards include the following:

• AX-FRSM-8T1 supports up to eight fractional T1 line interfaces.

• AX-FRSM-8E1 supports up to eight fractional E1 line interfaces.

• AX-FRSM-8T1-C supports up to eight channelized T1 line interfaces.

• AX-FRSM-8E1-C supports up to eight channelized E1 line interfaces.

FRSM for T1 features

The FRSM-8T1 and FRSM-8T1-C each provide eight T1 interfaces for full-duplex communications each up to 1.544 Mbps.

Each T1 line consists of an RJ-48, along with three LED indicators for line status. The FRSM-8T1 supports fractional and unchannelized T1 port selection on a per-T1 basis. The FRSM-8T1-C allows full DS0 and nxDS0 channelization of the T1s, for a maximum of 192 ports per FRSM-8T1-C.

Chapter 2 Module and Service Descriptions

FRSM for E1 features

Key Features include:

• Eight T1 (1.544 Mbps +/-50 bps or 32 ppm) lines

• B8ZS or AMI line coding

• ANSI T1.408 extended superframe format line framing

• Each interface can be configured as a single port (FRSM-8T1) or up to 24 ports (FRSM-8T1-C)

running at full line rate, at 56 or nx64 kbps

• Bit error rate tester (BERT) and extended loopback pattern generation/verification (with optional

SRM)

• 1:N redundancy within a group of n+1 FRSM cards on a shelf (with optional SRM)

• LOS, OOF, AIS, RAI alarms

• Transmitter loop-timed to receiver or synchronized to shelf

• Supports up to 1000 virtual connections per card

The FRSM-8E1 and FRSM-8E1-C each provide eight E1 interfaces for full-duplex communications each up to 2.044 Mbps. Each E1 line consists of an RJ-48 and SMB mini-connector, along with three LED indicators for line status.

The FRSM-8E1 supports fractional and unchannelized E1 port selection on a per-E1 basis. The FRSM-8E1-C allows full DS0 and nxDS0 channelization of the E1s, for a maximum of 248 ports per FRSM-8E1-C.

Key Features include:

2-28

• Eight E1 (2.048 Mbps +/-50 bps or 32 ppm) lines

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• HDB3 or AMI line coding

• ITU G.704 16-frame multiframe line framing and clear channel E1

• Each interface configurable as a single port (FRSM-8E1) or up to 31 ports (FRSM-8E1-C) running

at full line rate, at 56 or nx64 kbps

• BERT and extended loopback pattern generation/verification (with optional SRM)

• 1:N redundancy within a group of n+1 FRSM cards on a shelf (with optional SRM)

• LOS, OOF, AIS, RAI alarms

• Transmitter loop-timed to receiver or synchronized to shelf

• Supports up to 1000 virtual connections per card

LED Indicators

Table 2-4 and Tabl e 2-5 describe the FRSM T1/E1 LED faceplate indicators.

Table 2-4 Card Level LED Indicators for the FRSM T1/E1

Type of LED Color Meaning

ACT Green On indicates the card set is in active mode.

STBY Yellow Slow blink without the active LED indicates the card is

Frame Relay Service Modules

in the boot state.

Fast blink with the active LED indicates the card is being downloaded.

Fast blink indicates the service module is passing BRAM channel information to the ASC.

Steady yellow indicates the card is in standby mode and the firmware is executing ADMIN code.

FAIL Red Steady red with active and standby LEDs off indicates

either the card is in the Reset condition or the card has failed.

Steady red with active LED on indicates the card was active prior to failing.

Steady red with standby LED on indicates the card was standby prior to failing.

Table 2-5 Line Level LED Indicators for the FRSM T1/E1

Type of LED Color Meaning

PORT Green Green indicates the port is active.

Red Red indicates a local alarm on the port.

Yellow Yellow indicates a remote alarm on the port.

Off indicates the port has not been activated (upped).

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Frame Relay Service Modules

Card Illustrations

• Figure 2-14 is an illustration of the front card (applies to both the MGX-FRSM-8T1 and

• Figure 2-15 is an illustration of the FRSM T1 and E1 back cards.

Figure 2-14 MGX-FRSM-8T1

Chapter 2 Module and Service Descriptions

MGX-FRSM-8E1).

–

AX-RJ48-8T1 is the T1 back card. An AX-R-RJ48-8T1 is required for redundancy support.

–

AX-RJ48-8E1 and AX-SMB-8E1 are the E1 back cards for RJ48 and SMB connections. A special AX-R-SMB-8E1 card is required for redundancy support.

ACT

STBY

FAIL

PORT 1

PORT 2

PORT 3

PORT 4

PORT 5

PORT 6

PORT 7

PORT 8

FRSM

8T1

17912

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Chapter 2 Module and Service Descriptions

Figure 2-15 RJ-48 and SMB Back Cards for the MGX-FRSM-8T1/E1

Frame Relay Service Modules

RJ48-8E1

RX1

TX1

RX2

TX2

RX3

TX3

RX4

TX4

RX5

TX5

RX6

TX6

RX7

RJ48-8T1

RJ48-8E1

SMB-8E1

T1 RJ48

back card

E1 RJ48 back card

TX7

RX8

TX8

E1 SMB

back card

T1 RJ48

redundant

8-port

back card

E1 RJ48

redundant

8-port

back card

18739

E1 SMB

redundant

8-port

back card

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Frame Relay Service Modules

FRSMs for T3 and E3 lines

The FRSMs for T3 and E3 lines include the following models

• MGX-FRSM-2CT3 provides two channelized T3 interfaces for high-density nxDS0 and DS1 frame

services. The FRSM-2CT3 supports up to 4000 virtual connections per card.

• MGX-FRSM-2T3E3 provides unchannelized Frame Relay service over two T3 or E3 lines. This

module can also support subrate T3 or E3 for tiered DS3 on each physical port. The FRSM-2T3E3 supports up to 2000 virtual connections per card.

Features

This section lists the features specific to the T3 and E3 interfaces. See the “Features Common to All

FRSMs” section on page 2-20 for a description of features that apply to all FRSM modules.

T3 Interfaces

• Two DSX-3 (44.736 Mbps +/-20 ppm) interfaces with dual female 75-ohm BNC coaxial connectors

per port (separate RX and TX)

• B3ZS line coding

Chapter 2 Module and Service Descriptions

• Pulse shape conforming to ANSI T1.102.1993

• C-bit parity and M13 line framing formats

• Scrambling and subrate (FRSM-2T3E3) support of major DSU vendors

• T3 bit error rate tester (BERT) and extended loopback pattern generation/verification

• 1:1 redundancy with Y-cabling for T3 FRSM cards of the same type

• LOS, OOF, AIS, RAI, FEBE alarm detection/generation support

Note Subrate capability is not supported on Kentrox equipment.

E3 Interfaces

• Two G.703 (34.368 Mbps +/-20 ppm) interfaces with dual female 75-ohm BNC coaxial connectors

per port (separate RX and TX)

• HDB3 line coding

• Pulse shape conforming to ITU G.703

• ITU G.751 line framing format

• Scrambling and subrate (FRSM-2T3E3) support of major DSU vendors

• E3 BERT and extended loopback pattern generation/verification

• 1:1 redundancy with Y-cabling for T3 FRSM cards of the same type

• LOS, OOF, AIS, RAI, FEBE alarm detection/generation support

2-32

Note Subrate capability is not supported on Kentrox equipment.

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Chapter 2 Module and Service Descriptions

Card Combinations

The following card combinations are supported:

• MGX-FRSM-2CT3 front card with the BNC-2T3 back card

• MGX-FRSM-2T3E3 front card with a BNC-2T3 or BNC-2E3 back card

Note A special BNC-2E3A back card applies to Australia only. The BNC-2E3 applies to all other sites that

require E3 lines.

Illustrations

For Illustrations of the Very High Speed FRSM front and back cards, see the following illustrations:

• MGX-FRSM-2CT3 front card, see Figure 2-16 on page 2-34.

• MGX-FRSM-2T3E3 front card, see Figure 2-17 on page 2-35.

• MGX-BNC-2T3 back card, see Figure 2-18 on page 2-36.

• MGX-BNC-2E3 back card, see Figure 2-19 on page 2-37.

Frame Relay Service Modules

FRSM-2T3E3 LED Indicators

Table 2-6 and Tabl e 2-7 describe the FRSM-2T3E3 LED faceplate indicators.

Table 2-6 Card Level LED Indicators for the FRSM-2T3E3

Type of LED Color Meaning

ACT Green On indicates the card set is in active mode.

STBY Yellow

FAIL R ed

• Slow blink without the active LED indicates the

card is in the boot state.

• Fast blink with the active LED indicates the card

is being downloaded.

• Fast blink indicates the service module is passing

BRAM channel information to the ASC.

• Steady yellow indicates the card is in standby

mode and the firmware is executing ADMIN code.

• Steady red with active and standby LEDs off

indicates either the card is in the reset condition or the card has failed.

• Steady red with active LED on indicates the card

was active prior to failing.

• Steady red with standby LED on indicates the card

was standby prior to failing.

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Frame Relay Service Modules

Figure 2-16 MGX-FRSM-2CT3

CLEI Code Label

Chapter 2 Module and Service Descriptions

ACT

STBY

FAIL

PORT 1

PORT 2

FRSM

2CT3

Front Card

22169

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Chapter 2 Module and Service Descriptions

Figure 2-17 MGX-FRSM-2T3E3

CLEI Code Label

Frame Relay Service Modules

ACT

STBY

FAIL

PORT 1

PORT 2

FRSM

2T3E3

Front Card

22170

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Frame Relay Service Modules

Figure 2-18 BNC-2T3

Chapter 2 Module and Service Descriptions

BNC-2T3

SIGNAL

PORT 1

SIGNAL

PORT 2

12209

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Chapter 2 Module and Service Descriptions

Figure 2-19 BNC-2E3

BNC-2E3

SIGNAL

PORT 1

SIGNAL

Frame Relay Service Modules

PORT 2

57919

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Frame Relay Service Modules

FRSMs for Serial Connections

The FRSMs that support serial connections include the following models.

• MGX-FRSM-HS2 provides unchannelized Frame Relay service over two HSSI lines on the

SCSI2-2HSSI back card. Each port can operate in either DTE or DCE mode.

• MGX-FRSM-HS1/B supports four V.35 or four X.21 ports. Each port can operate in DTE or DCE

mode. The mode depends on the type of attached cable. See the “MGX-FRSM-HS1/B Cabling”

section on page 2-39 to determine the correct cabling for the intended mode of each port.

FRSM-HS1/B X.21 and V.35 Interfaces

Features specific to the FRSM-HS1/B with X.21 and V.35 interfaces are

• Four X.21 or four V.35 lines

• DCE/DTE selection on a per-port basis

• As a DCE, clock speeds of 48 Kbps, 56 Kbps, up to 2 Mbps (for nx64 Kbps), up to 8 Mbps (for nx1.5

Mbps and nx2 Mbps), are supported

• As a DTE, obtains clock from line, up to 8 Mbps

• The total maximum throughput of all lines on a card is 16Mbps

Chapter 2 Module and Service Descriptions

• Supports 200 DLCIs per card

• Support for per-VC queueing on ingress with closed-loop traffic management

• Support for two priority levels of egress port queues for data traffic

• Various DCE/DTE loopbacks

FRSM-HS2 HSSI Interfaces

Features specific to the FRSM-HS2 with HSSI interfaces are

• Two HSSI lines

• DCE/DTE selection on a per-port basis

• As a DCE, clock speeds up to 52 Mbps (for nx1.5 Mbps and nx2 Mbps), are supported

• As a DTE, obtains clock from line, up to 52 Mbps

• Supports 2000 DLCIs per card

• Support for per-VC queueing on ingress with closed-loop traffic management

• Support for five classes of service (high-priority, rt-VBR, nrt-VBR, ABR, UBR) for data traffic

• Various DCE/DTE loopbacks

• 1:1 redundancy with Y-cabling for FRSM-HS2 cards

Card Combinations

2-38

The following card combinations are supported.

• MGX-FRSM-HS2 with a SCSI2-2HSSI back card

• MGX-FRSM-HS1/B with a MGX-12IN1-S4 back card

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Chapter 2 Module and Service Descriptions

Illustrations

Card illustrations are shown as follows.

• MGX-FRSM-HS2 front card, see Figure 2-20 on page 2-41.

• MGX-FRSM-HS1/B front card, see Figure 2-21 on page 2-42.

• MGX-SCSI2-2HSSI back card, see Figure 2-22 on page 2-43.

• Multifunction MGX-12IN1-4S back card, see Figure 2-23 on page 2-44. This back card supports

four V.35 or four X.21 ports.

LED Indicators

Table 2-7 and Tabl e 2-8 describe the FRSM T1/E1 LED faceplate indicators for both the FRSM-HS1/B

and the FRSM-HS2.

Table 2-7 Card Level LED Indicators for the FRSM-HS1/B and the FRSM-HS2

Type of LED Color Meaning

ACT Green On indicates the card set is in active mode.

STBY Yellow

Frame Relay Service Modules

• Slow blink without the active LED indicates the

card is in the boot state.

• Fast blink with the active LED indicates the card

is being downloaded.

FAIL R ed

MGX-FRSM-HS1/B Cabling

The cable model numbers are derived from the Cisco 12-IN-1 series of cables (see Table 2-8). Each cable can have a male or female connector at the far end. Also, the available clock sources depend on the mode (see Tab le 2- 9). In DTE mode, the clock source is either line or ST (ST is a wire in the cable). For DCE, the clock source is the front card.

See Table 2-10 for the relationship between cabling and modes and part numbers.

Table 2-8 12IN1-4S Back Card Cable Types

• Fast blink indicates the service module is passing

BRAM channel information to the ASC.

• Steady yellow indicates the card is in standby

mode and the firmware is executing ADMIN code.

• Steady red with active and standby LEDs off

indicates either the card is in the reset condition or the card has failed.

• Steady red with active LED on indicates the card

was active prior to failing.

• Steady red with standby LED on indicates the card

was standby prior to failing.

Cable Type X.21 V.35

DCE X.21 DCE V.35 DCE

DTE X.21 DTE V.35 DTE

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Frame Relay Service Modules

Table 2-9 Cabling and Clock Sources for the MGX-FRSM-HS1/B

Mode Type of Cable Clock Source Mode of Far End

DTE DTE line DCE (male or female connector at far end)

DCE DCE internal DTE (male or female connector at far end)

DTE_ST DTE ST line DCE (male or female connector at far end)

Table 2-10 Cabling Types and Part Numbers X.21 and V.35

Type of Cable Far End Connector Part Number

X.21 DTE male (standard) 72-1440-01

X.21 DCE female (standard) 72-1427-01

V.35 DTE male (standard) 72-1428-01

V.35 DTE female (atypical) 72-1436-01

V.35 DCE female (standard) 72-1429-01

V.35 DCE male (atypical) 72-1437-01

V.35 DTE-DCE — 72-1441-01

Straight-through — 72-1478-01

Loopback plug — 72-1479-01

Chapter 2 Module and Service Descriptions

Note The cable type and part number are printed on a plastic band located near the smaller connector.

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Chapter 2 Module and Service Descriptions

Figure 2-20 MGX-FRSM-HS2

CLEI Code Label

Frame Relay Service Modules

ACT

STBY

FAIL

PORT 1

PORT 2

FRSM

HS2

Front Card

17948

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Frame Relay Service Modules

Figure 2-21 MGX-FRSM-HS1/B Front Card Faceplate

CLEI Code Label

Chapter 2 Module and Service Descriptions

ACT

STBY

FAIL

PORT 1

PORT 2

FRSM

HS1/B

Front Card

26695

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Chapter 2 Module and Service Descriptions

Figure 2-22 SCSI2-2HSSI

SCSI2-2HSSI-LM

R T

Frame Relay Service Modules

R T

17949

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Frame Relay Service Modules

Figure 2-23 12IN1 S4S Back Card Faceplate

ENABLED

12-IN-1

P O R T 1

P O R T 2

P O R T 3

Chapter 2 Module and Service Descriptions

P O R T 4

26696

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Chapter 2 Module and Service Descriptions

Circuit Emulation Service Modules

The main function of the Circuit Emulation Service Module (CESM) is to provide a constant bit rate (CBR) circuit emulation service by converting data streams into CBR AAL1 cells for transport across an ATM network. The CESM supports the CES-IS specifications of the ATM Forum.

There are two types of CESM modules:

• CESM for T1 and E1 lines, page 2-45.

• CESM for T3 and E3 lines, page 2-50.

CESM for T1 and E1 lines

The eight-port AX-CESM-8T1 and AX-CESM-8E1 models allow individual physical ports to be configured for structured or unstructured data transfer. The CESM provides constant-bit-rate (CBR) services over an ATM network. It allows circuit-based equipment, such as PBXs, to be interconnected over an ATM backbone via CBR connections. The eight port CESM cards support both channelized (nx64 Kbps) and unchannelized (T1/E1) circuit-based equipment. In ATM Forum terminology, the terms structured data transfer (SDT) and unstructured data transfer (UDT) are used for channelized and unchannelized circuit emulation, respectively.

In addition, flexible clocking mechanisms are provided to meet different application requirements. Synchronous clocking and asynchronous clocking, using either SRTS or Adaptive clock recovery, are both supported.

As an enhancement, dynamic bandwidth allocation is supported via on-hook/off-hook detection to reduce backbone bandwidth consumed when it is not required by the applications. This allows other traffic streams, such as VBR and ABR traffic, to take advantage of the bandwidth normally reserved for the circuit traffic.

Frame Relay Service Modules

CESM T1 and E1 Features

The eight port CESM cards offer the following key features for both T1 and E1 interfaces:

• Standards-based AAL1

• Compliant with ATM Forum CES-V.2.0

• Choice of structured or unstructured data transfer per physical interface

• Time slots must be contiguous for n x 64-kbps fractional T1/E1 service

• Any n x 64-kbps channel can be mapped to any virtual circuit (VC)

• Choice of partially filled AAL1 cells per VC

• Support Super Frame (SF) and Extended SuperFrame (ESF) framing modes

• Supports synchronous clocking for both UDT and SDT

• Supports asynchronous clocking for UDT, with SRTS and adaptive clock recovery methods

• ON/OFF hook detection and idle suppression using channel-associated signaling (CAS)

• Supports physical T1/E1 interfaces via back cards or higher speed channelized interfaces using

TDM infrastructure on backplane (SRM)

• Traffic is mapped between service interfaces and the ATM backplane using standards-compliant

adaptation. Consistent with the Cisco intelligent quality of service (QoS) management features, CESM cards support per-VC express queuing.

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Frame Relay Service Modules

• A single T1/E1 CESM card can provide standby redundancy for all active CESM cards of the same

type in the shelf (N:1 redundancy), with SRM.

• CESM cards are supported by standards-based management tools, including Simple Network

Management Protocol (SNMP), Trivial File Transfer Protocol (TFTP) for configuration and statistics collection, and a command-line interface. Cisco WAN Manager also provides full graphical user interface (GUI) support for connection and equipment management.

1:N Redundancy for the CESM T1/E1

Redundancy for the AX-CESM-8T1 and AX-CESM-8E1 is available through the MGX-SRM-3T3/C.

• 1:N redundancy requires that the group contain one redundancy back card.

• The redundancy back card must be the special R-RJ45 version (AX-R-RJ48-8T1-LM or

AX-R-SMB-8E1-LM).

For information on installation requirements, see the “Service Resource Module” section on page 2-12.

For configuration requirements, see the “Service Resource Module” section on page 6-60.

For instructions on how to use the CiscoView application to configure redundancy, refer to the CiscoView user-documentation.

Chapter 2 Module and Service Descriptions

Card Combinations

A card set has an AX-CESM-8T1 or AX-CESM-8E1 front card and one of the following back cards:

• AX-RJ48-8T1-LM

• AX-R-RJ48-8T1-LM (for redundancy support)

• AX-RJ48-8E1-LM

• AX-SMB-8E1-LM

• AX-R-SMB-8E1-LM (for redundancy support)

CESM T1/E1 Illustrations

• Figure 2-24 on page 2-48 shows the front cards for the Eight-Port CESM (T1 and E1).

• Figure 2-25 on page 2-49 shows the RJ-48 and SMB Back Cards for the MGX-CESM-8T1E1.

LED Indicators for the Eight-Port CESM

The description of the LEDs on the eight-port CESM correspond to the illustration in Figure 2-24 on

page 2-48.

Table 2-11 LED Indicators for Eight-Port CESM

Type of LED Color Meaning

ACT LED (Active) Green On indicates the card set is in active mode.

STBY Yellow Slow blink without the active LED indicates the card is

in the boot state.

Fast blink with the standby LED indicates the card is being downloaded.

Fast blink indicates the service module is passing BRAM channel information to the PXM1

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Chapter 2 Module and Service Descriptions

Table 2-11 LED Indicators for Eight-Port CESM (continued)

Type of LED Color Meaning

FAIL Red Steady red with active and standby LEDs off indicates

PORT Green Green indicates the port is active.

Frame Relay Service Modules

Steady yellow indicates the card is in standby mode and the firmware is executing ADMIN code.

either the card is in the reset condition, the card has failed, or the card set is not complete (no line module).

Steady red with active LED on indicates the card was active prior to failing.

Steady red with standby LED on indicates the card was standby prior to failing.

Both standby and red LED indicates self-test failure.

Red Red indicates a local alarm on the port. Off indicates

the port has not been activated (upped).

Yellow Yellow indicates a remote alarm on the port. Off

indicates the port has not been activated (upped).

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Frame Relay Service Modules

Figure 2-24 Front Cards for the Eight-Port CESM

Chapter 2 Module and Service Descriptions

• • • • •

ACT

STBY

FAIL

PORT 1

PORT 2

PORT 3

PORT 4

PORT 5

PORT 6

• • • • •

ACT

STBY

FAIL

PORT 1

PORT 2

PORT 3

PORT 4

PORT 5

PORT 6

2-48

PORT 7

PORT 8

CESM

8T1

T1 Front card

PORT 7

PORT 8

CESM

8E1

E1 Front card

17689

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Figure 2-25 RJ-48 and SMB Back Cards for the MGX-CESM-8T1E1

Frame Relay Service Modules

RJ48-8E1

RX1

TX1

RX2

TX2

RX3

TX3

RX4

TX4

RX5

TX5

RX6

TX6

RX7

RJ48-8T1

RJ48-8E1

SMB-8E1

T1 RJ48

back card

E1 RJ48

back card

TX7

RX8

TX8

E1 SMB

back card

T1 RJ48

redundant

8-port

back card

E1 RJ48

redundant

8-port

back card

18739

E1 SMB

redundant

8-port

back card

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Frame Relay Service Modules

CESM for T3 and E3 lines

The MGX-CESM-T3/E3 supports unstructured data transfer over a single T3 or E3 physical port at speeds of 44.736 Mbps (T3) or 34.368 Mbps (E3). Only synchronous timing is supported.

MGX-CESM-T3/E3 is a two-card set consisting of a front card and either a T3 back card or an E3 back card. Each back card provides two T3 or E3 ports (each port consists of two BNC connectors). Only port one is available on the back card when used with the CESM-T3/E3 front card. 1:1 redundancy is supported through a Y-cable on the line module back cards.

• Figure 2-26 on page 2-52 is an illustration of the MGX-CESM-T3/E3 front card.

• An illustration of the CESM back card for T3 lines is shown in Figure 2-27 on page 2-53.

• An illustration of the CESM back card for E3 lines is shown in Figure 2-28 on page 2-54.

CESM-T3/E3 Features

CESM cards support circuit emulation services using standards-based adaptation layers over ATM. The CESM-T3E3 uses AAL1 for T3 or E3 unstructured transfer mode operation, per the ATM Forum’s Circuit Emulation Specification, Version 2.0:

• Unstructured support: supports T3/E3 unstructured data transfer.

• Synchronous clocking: synchronous timing is the only mode that is supported. The clock must be

derived from the shelf.

• Onboard BERT: BERT support using on board BERT controller. BERT commands executed on

T3/E3 card.

Chapter 2 Module and Service Descriptions

T3 Interfaces

• Maximum number of connections is one. In the unstructured mode, one logical port is used to

represent the T3/E3 line and one connection is added to the port to emulate the circuit.

• Programmable egress buffer size and CDV tolerance settings are supported for flexible support of

jitter and latency requirements.

• Bit count integrity is maintained when AAL1 lost-cell condition is detected.

• The CESM card provides ingress/egress data and signaling trunk conditioning per VC as per ATM

Forum CES V2.0.

• T3/E3 CESM cards can be Y-cabled to provide 1:1 hot standby redundancy of the CESM.

• CESM cards are supported by standards-based management tools, including SNMP, TFTP (for

configuration/statistics collection), and a command line interface. The Cisco WAN Manager and CiscoView tools also provide full graphical user interface management support.

T3 interfaces are supported as follows.

• One DSX-3 (44.736 Mbps +/-40 ppm) interfaces with dual female 75-ohm BNC coaxial connectors

per port (separate RX and TX)

• B3ZS line coding

• Pulse shape conforming to ANSI T1.102

• T3 bit error rate tester (BERT) and extended loop-up, loop-down pattern generation and verification

• 1:1 redundancy with Y-cabling for T3 CESM cards of the same type

• LOS alarm detection/generation support

2-50

• Transmitter loop-timed to receiver or synchronized to shelf

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Chapter 2 Module and Service Descriptions

E3 Interfaces

T3 interfaces are supported as follows.

• One G.703 (34.368 Mbps +/-20 ppm) interface with dual female 75-ohm BNC coaxial connectors

per port (separate RX and TX)

• HDB3 line coding

• Pulse shape conforming to ITU G.703

• E3 BERT and extended loop-up, loop-down pattern generation and verification

• 1:1 redundancy with Y-cabling for E3 CESM cards of the same type

• LOS alarm detection/generation support

• Transmitter loop-timed to receiver or synchronized to shelf

LED Indicators

Table 2-12 LED Indicators for T3/E3 CESM

Type of LED Color Meaning

ACT Green On indicates the card set is in active mode.

STBY Yellow

Frame Relay Service Modules

• Slow blink with the active LED off indicates the card is

in the boot state. Fast blink with the standby LED indicates the receiving firmware.

• Fast blink indicates the service module is passing BRAM

channel information to the PXM1.

• Steady yellow indicates the card is in Standby mode and

the firmware is executing ADMIN code.

FAIL R ed

• Steady red with active and standby LEDs off indicates

either the card is in the reset condition, the card has failed, or the card set is not complete (no line module).

• Steady red with active LED on indicates the card was

active prior to failing.

• Steady red with standby LED on indicates the card was

standby prior to failing.

• Both standby and red LED lit indicates self-test failure.

PORT Green Green indicates the port is active.

Red Red indicates a local alarm on the port.

Yellow Yellow indicates a remote alarm on the port.

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Frame Relay Service Modules

CESM T3/E3 Illustrations

Illustrations of the CESM cards are as follows.

Figure 2-26 CESM-T3/E3 Front Card

Chapter 2 Module and Service Descriptions

• The MGX-CESM-T3/E3 front card is shown in Figure 2-26 on page 2-52.

• BNC-2T3 Back Card for the CESM-T3/E3 is shown in Figure 2-27 on page 2-53.

• BNC-2E3 Back Card for the CESM-T3/E3 is shown in Figure 2-28 on page 2-54.

ACT

STBY

FAIL

PORT 1

CESM

T3-E3

Frontcard

70012

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Chapter 2 Module and Service Descriptions

Figure 2-27 BNC-2T3 Back Card for the CESM-T3/E3

BNC-2T3

SIGNAL

PORT 1

SIGNAL

Frame Relay Service Modules

PORT 2

12209

Note Only port one is available on the CESM T3/E3 back card when used with the CESM-T3/E3 front

card.

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Frame Relay Service Modules

Figure 2-28 BNC-2E3 Back Card for the CESM-T3/E3

Chapter 2 Module and Service Descriptions

BNC-2T3

SIGNAL

PORT 1

SIGNAL

PORT 2

12209

Note Only port one is available on the CESM T3/E3 back card when used with the CESM-T3/E3 front

card.

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Chapter 2 Module and Service Descriptions

Voice Service—VISM

The Voice Interworking Service Module (VISM) is a front and back card set designed to transport digitized voice signals across a packet network. This provides an interface or gateway between conventional voice TDM networks and networks based upon packet switching technology.

There are two types of VISM front cards:

• MGX-VISM-8T1 supports up to eight T1 lines carrying digitized voice

• MGX-VISM-8E1 supports up to eight E1 lines carrying digitized voice.

VISM Documentation

Installation, configuration and support for the VISM services are not included in this manual. For more information on the VISM, refer to the following Cisco Systems publications:

• For information on VISM features and configuration, refer to the Cisco Voice Interworking Service

Module Installation and Configuration.

• For up to date information on VISM version support and features, refer to the Software Release

Notes for the Cisco WAN MGX 8850, MGX 8230, and MGX 8250 Software.

Frame Relay Service Modules

Summary of Features Supported with VISM 1.5

The following features are supported with VISM 1.5 on the MGX 8850.

VoIP using RTP (RFC 1889)

VISM R1.5 supports standards-based VoIP using RTP (RFC1889) and RTCP protocols. This allows VISM to interwork with other VoIP Gateways.

VoAAL2 (With sub-cell multiplexing) PVC

The VISM supports standards-compliant AAL2 adaptation for the transport of voice over an ATM infrastructure. AAL2 trunking mode is supported.

Codec Support

G.711 PCM (A-law, mu-law), G.726, G.729a/b

Eight T1/E1 Interfaces

The VISM supports eight T1 or eight E1 interfaces when G.711 PCM coding is used. For higher complexity coders such as G.726-32K and G.729a-8K, the density drops to six T1 or five E1 interfaces (max 145 channels).

1:N Redundancy

1:N redundancy using SRM.

T3 Interfaces (via SRM Bulk Distribution)

T3 interfaces are supported using the SRM’s bulk distribution capability. In this case, the T3 interfaces are physically terminated at the SRM module. The SRM module breaks out the individual T1s and distributes the T1s via the TDM backplane bus to the individual VISM cards for processing.

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Frame Relay Service Modules

Echo Cancellation

The VISM provides on-board echo cancellation on a per-connection basis. Up to 128 msec user-configurable near-end delay can be canceled. The echo cancellation is compliant with the ITU G.165 and G.168 specifications.

Voice Activity Detection (VAD)

VISM uses voice activity detection (VAD) to distinguish between silence and voice on an active connection. VAD reduces the bandwidth requirements of a voice connection by not generating traffic during periods of silence in an active voice connection. At the far-end, comfort noise is generated.

Fax/Modem Detection for ECAN and VAD Control

The VISM continually monitors and detects fax and modem carrier tones. When carrier tone from a fax or modem is detected, the connection is upgraded to full PCM to ensure transparent connectivity. Fax and modem tone detection ensures compatibility with all voice-grade data connections.

CAS Tunneling via AAL2 (for AAL2 Trunking Mode)

The VISM in AAL2 mode facilitates transport of CAS signaling information. CAS signaling information is carried transparently across the AAL2 connection using type 3 packets. In this mode, VISM does not interpret any of the signaling information.

Chapter 2 Module and Service Descriptions

PRI Tunneling via AAL5 (for AAL2 Trunking Mode)

VISM supports transport of D-ch signaling information over an AAL5 VC. The signaling channel is transparently carried over the AAL5 VC and delivered to the far-end. In this mode, VISM does not interpret any of the signaling messages.

Voice CAC

VISM can be configured to administer Connection Admission Control (CAC) so that the bandwidth distribution between voice and data can be controlled in AAL2 mode.

Type 3 Packet for DTMF

The VISM in AAL2 mode facilitates transport of DTMF signaling information. DTMF information is carried transparently across the AAL2 connection using type 3 packets.

Dual (Redundant) PVCs for Bearer/Control

The VISM provides the capability to configure two PVCs for bearer/signaling traffic terminating on two external routers (dual-homing). VISM continually monitors the status of the active PVC by using OAM loopback cells. Upon detection of failure, the traffic is automatically switched over to the backup PVC.

64 K Clear Channel Transport

The VISM supports 64 Kbps clear channel support. In this mode, all codecs are disabled and the data is transparently transported through the VISM.

DTMF Relay for G.729

In VoIP mode, DTMF signaling information is transported across the connection using RTP NSE (Named Signaling Event) packets

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MGCP 0.1 for VoIP with Softswitch Control

VISM supports Media Gateway Control Protocol (MGCP) Version 0.1. This open protocol allows any softswitch to interwork with the VISM module.

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Chapter 2 Module and Service Descriptions

Resource Coordination via SRCP

Simple Resource Control Protocol (SRCP) provides a heartbeat mechanism between the VISM and the Softswitch. In addition, SRCP also provides the Softswitch with gateway auditing capabilities.

Full COT Functions

VISM provides the capability to initiate continuity test as well as provide loopbacks to facilitate continuity tests when originated from the far-end.

Courtesy Down

This feature provides a mechanism for graceful upgrades. By enabling this feature, no new calls are allowed on the VISM while not disrupting the existing calls. Eventually, when there are no more active calls, the card is ready for a upgrade and/or service interruption.

Summary of Features Supported with VISM 2.0

VISM 2.0 supports all of the VISM 1.5 features listed above. In addition, VISM 2.0 supports the following features:

Frame Relay Service Modules

VISM Redundancy

PRI Backhaul to the Softswitch Using RUDP

The PRI backhaul capability provides PRI termination on the VISM with the Softswitch providing call control. ISDN Layer 2 is terminated on the VISM and the Layer 3 messages are transported to the Softswitch using RUDP.

Latency Reduction (<60 ms round-trip)

Significant improvements have been made to bring the round-trip delay to less than 60 ms.

Codecs Preference

VISM provides the capability to have the codecs negotiated between the two end-points of the call. The VISM can be configured, for a given end-point, to have a prioritized list of codecs. Codec negotiation could be directly between the end-points or could be controlled by a softswitch.

31 DS0 for E1 with 240 Channels Only

While all 31 DS0s on a E1 port can be used, there is a limitation of 240 channels per card.

The VISM redundancy strategy is the same as for any of the eight port cards in the MGX 8850.

• For VISM-8T1, 1:N redundancy is supported using the SRM-3T3.

• For VISM-8E1, 1:N redundancy is supported only via LMs using the SRM-3T3 or the SRM-T1E1.

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Frame Relay Service Modules

Card Combinations

A card set has an VISM-8T1 or VISM-8E1 front card and one of the following back cards:

• AX-RJ48-8T1-LM

• AX-R-RJ48-8T1-LM (for redundancy support)

• AX-RJ48-8E1-LM

• AX-SMB-8E1-LM

• AX-R-SMB-8E1-LM (for redundancy support)

VISM Card Illustrations and LED Description

Table 2-13 describes the VISM card LED indicators.

See Figure 2-29 for an illustration of the VISM front cards.

See Figure 2-30 for an illustration of the VISM back cards.

Table 2-13 LED Indicators for VISM

Chapter 2 Module and Service Descriptions

Type of LED Color Meaning

ACT Green On indicates the card set is in active mode.

STBY Yellow

• Slow blink with the active LED off indicates the card is

in the boot state. Fast blink with the standby LED indicates the receiving firmware.

• Fast blink indicates the service module is passing BRAM

channel information to the PXM1.

• Steady yellow indicates the card is in Standby mode and

the firmware is executing ADMIN code.

FAIL R ed

• Steady red with active and standby LEDs off indicates

either the card is in the reset condition, the card has failed, or the card set is not complete (no line module).

• Steady red with active LED on indicates the card was

active prior to failing.

• Steady red with standby LED on indicates the card was

standby prior to failing.

• Both standby and red LED indicates self-test failure.

PORT Green Green indicates the port is active.

Red Red indicates a local alarm on the port.

Yellow Yellow indicates a remote alarm on the port.

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Cisco MGX 8850 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

CONTENTS

Objectives

Preface

Audience

Organization

Related Documentation

MGX 8850 Switch, Release 1.1.3 Related Documentation

Cisco WAN Manager, Release 10, Related Documentation

Cisco WAN Switching Software, Release 9.3 Related Documentation

Conventions

Obtaining Documentation

World Wide Web

Documentation CD-ROM

Ordering Documentation

Documentation Feedback

Obtaining Technical Assistance

Cisco.com

Technical Assistance Center

Cisco TAC Web Site

Cisco TAC Escalation Center

Introducing the MGX 8850

MGX 8850 System Overview

Applications of the MGX 8850

Universal Edge Architecture

Card Slot Locations

Standards-Based Conversion to ATM

MGX 8850 Enclosure and Power

MGX 8850 Management

Summary of the MGX 8850 Cards and Modules

Introduction to Core Card Sets and Service Modules

Redundancy for Service Modules

1:1 Redundancy

Hot Standby

1:N Redundancy

Module and Service Descriptions

Processor Switching Module

PXM1 Features

PXM1 Illustration and LED Description

PXM1 User Interface Back Cards

1. PXM1-UI (standard)

2. PXM-UI-S3 (optional)

Making External Clock Connections

Stratum-4 clocking

Stratum-3 clocking

PXM1 Back Card Illustrations

PXM1 User Interface Back Cards

SMFLR-1-622 Back Card

SMFIR-1-622 Back Card

SMF-155 Back Card

BNC-2T3 Back Card

BNC-2E3 Back Card

Service Resource Module

Bit Error Rate Testing

1:N Service Module Redundancy

Bulk Distribution Mode

Module Requirements with Bulk Distribution and Redundancy

Installation Requirements for the MGX-SRM-3T3/C

SRM Illustration and LED Indicators

ATM UNI Service Module (AUSM)

AUSM Features

Quality of Service (QoS) Management

Inverse Multiplexing

Physical Layer Features

AUSM/B Front Card Illustration and LED Description

Back Cards for the AUSM/B

Frame Relay Service Modules

Features Common to All FRSMs

Data-Link Layer Features

Frame Relay Features

ATM FUNI Features

Frame Forwarding Features

Rules for FRSM Slot Installation

Redundancy for Frame Service Modules

Hot Standby

1:1 Redundancy

1:N Redundancy