Cisco Systems MGX 8220 Cisco MGX 8220 Cards

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Cisco MGX 8220 Installation and Configuration

Release 5.0, Part Number 78-6430-03 Rev. D0, November 2003

Chapter

Cisco MGX 8220 System Overview

The front card communicates with t he b ack ca rd using a backplane. This backp lan e de sig n all ows th e

function modules to be replaced or upgraded without disturbing the physical cabling.

•The “Cisco MGX 8220 Cards” sectio n on page1-6 briefly summarizes the front (functi on) modul es

available for use with the Cisco MGX 8220.

•Chapter 2, “Common Equipment Description,” includes a description of core modules.

•Chapter 4, “MGX 8220 Service Modules,” describes the various servic e m od ules in detail.

Cisco MGX 8220 Cards

Cisco MGX 8220 cards are installed in p airs c onsist ing of a front c ard (fu nction module) a nd a matc hing

back card (line module). These cards are inst alled in the same numbered slot. Commun ication between

slots is achieved through buses in the shelf backplane.

The ASC and the BNM modules must always be present in an Cisco MGX 8220 shelf and are referred

to as the core modules. The Cisco MGX 8220 shelf supports redundant core modules where one

ASC/BNM set is an active set and a s eco nd A SC /B NM is a standby set. In the event of a ma lf un ct io n ,

the standby set automatical ly t ake s over as the active set. The SRM is op ti on al. If present, it is part of

the core card set, with switchover to the standby set if the active BNM or ASC malfunctions.

The following modules do not use back cards:

•SRM-T1/E1 card—This module includes only a front card . Se e the “Service Resource Mo dules”

section on page2-22 for more information.

•Service modules that use the SRM-3T3 distribution bus. See the “AX-SRM-3T3” section on

page2-24 for more information.

•Cisco MGX 8220 Shelf Controller (AX-ASC)

AXIS Shelf Controller (ASC) is a pair of cards that provides overall control of the shelf. These

cards also provide line interfaces to the mai nt en a n ce an d contr o l p or ts u sed fo r user co nfigu rati on

and shelf management.

•Broadband network module (AX-BNM-T3)

This is a pair of cards that provides a UN I/N N I in te rf ace to th e a ttached Cisco BPX switch over a

T3 ATM interface.

•Broadband network module (AX-BNM-E3)

This is a pair of cards that provides a U NI/NNI interface to the attached Cis co BPX switch over an

E3 ATM interface.

•Broadband network module (AX-BNM-155)

This is a pair of cards that provides the inter face to th e att ach ed Ci sco BPX switch over a SONET

ATM interface.

•Frame service module for T1 (AX-FRSM-4T1)

This card provides interfaces for up to four T1 lines, ea ch of which can support one 56 k bps or one

nx64 kbps FR-UNI, FR-NNI port, ATM-FUNI, or a Frame forwarding port.