1-6
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 the back card using a backplane. This backplane design allows the
function modules to be replaced or upgraded without disturbing the physical cabling.
•
The “Cisco MGX 8220 Cards” section on page 1-6 briefly summarizes the front (function) modules
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 service modules in detail.
Cisco MGX 8220 Cards
Cisco MGX 8220 cards are installed in pairs consisting of a front card (function module) and a matching
back card (line module). These cards are installed in the same numbered slot. Communication 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 second ASC/BNM is a standby set. In the event of a malfunction,
the standby set automatically takes over as the active set. The SRM is optional. 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. See the “Service Resource Modules”
section on page 2-22 for more information.
•
Service modules that use the SRM-3T3 distribution bus. See the “AX-SRM-3T3” section on
page 2-24 for more information.
Cards Supported in the Cisco MGX 8220
•
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 maintenance and control ports used for user configuration
and shelf management.
Broadband Network Modules
•
Broadband network module (AX-BNM-T3)
This is a pair of cards that provides a UNI/NNI interface to the attached Cisco BPX switch over a
T3 ATM interface.
•
Broadband network module (AX-BNM-E3)
This is a pair of cards that provides a UNI/NNI interface to the attached Cisco BPX switch over an
E3 ATM interface.
•
Broadband network module (AX-BNM-155)
This is a pair of cards that provides the interface to the attached Cisco BPX switch over a SONET
ATM interface.
Frame Service Modules
•
Frame service module for T1 (AX-FRSM-4T1)
This card provides interfaces for up to four 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.
