Switch Installation Guide

2-3
Cisco MGX 8950 Hardware Installation Guide
Release 2.1, Part Number 78-11273-01 Rev. B0, March 2002
Chapter 2 Product Overview
MGX 8950 Card Sets
Note Cisco Systems recommends you use all four XM-60 modules for full redundancy.
A card set consists of a front card with its attached daughter card and one or two back cards (or line
cards). The front card contains the processing intelligence and, on the daughter card, the firmware that
distinguishes the interface (OC-48, OC-12, OC-3, T3, E3, and so on). The back cards on the AXSM
simply provide the electrical or optical interface for one or more lines of a particular type. See Table 2-1
for a list of front and back cards.
Note The daughter card is not a field-replaceable module, so this manual does not describe it.
Table 2-1 MGX 8950 Front and Back Cards
Card Description
Switch Module (XM-60) Provides 60 Gbps of switching capability each and provides up to
240 Gbps of switching capacity (using four XM-60s).
Processor Switching Module (PXM45/B) Front card controlling the switch and supporting external interfaces for
user-access. The back cards consist of a user interface card
(PXM-UI-S3) and the hard drive card (PXM-HD).
Processor Switching Module User Interface
(PXM-UI-S3)
Contains various types of user interface ports to let you access and
control the switch. Provides Stratum 3 network clocking.
Processor Switching Module Hard Drive
(PXM-HD)
Houses the disk drive containing all switch and network-related
information.
ATM Switch Service Module
(MGX-AXSM-1-2488/B)
Double-height, dual-role card that serves as a trunk, and provides
1 OC-48 or STM-16,1 line at 2488 Mbps.
ATM Switch Service Module
(MGX-AXSM-16-155/B)
Double-height, dual-role card that serves as a trunk or a UNI, and
provides 16 OC-3c or STM-1, 16 lines at 155 Mbps.
ATM Switch Service Module
(MGX-AXSM-4-622/B)
Double-height, dual-role card that serves as a trunk or a UNI, and
provides 4 OC-12c or STM-4, 4 lines at 622 Mbps.
ATM Switch Service Module
(MGX-AXSM-16-T3E3/B)
Double-height, dual-role card that serves as a trunk or a UNI, and
provides 16 T3 or E3 lines.
Service Network Module
(MGX-SMFIR-2-622/B
MGX-SMFLR-2-622/B)
The MGX-SMFIR-2-622/B is an intermediate-range module for the
AXSM and provides a SONET/SDH OC12/STM4 ATM interface at
622 Mbps with SC connectors.
The MGX-SMFLR-2-622/B is a broadband network long-range module
for the AXSM and provides a SONET OC12/STM4 ATM interface at
622 Mbps with an SC connectors.
Service Network Module
(MGX-MMF-8-155-MT/B,
MGX-SMFIR-8-155-LC/B, and
MGX-SMFLR-8-155-LC/B)
The MGX-MMF-8-155-MT/B is a short-range, multi-mode fiber
module for the AXSM providing 8 SONET/SDH OC3/STM1 ATM
interfaces at 155 Mbps, and has MTRJ connectors.
The MGX-SMFIR-8-155-LC/B is an intermediate-range, single-mode
fiber module for the AXSM providing 8 SONET/SDH OC3/STM1 ATM
interfaces at 155 Mbps, and has an LC connector.
The MGX-SMFLR-8-155-LC/B is a long-range, single-mode fiber
module for the AXSM providing 8 SONET/SDH OC3/STM1 ATM
interfaces at 155 Mbps, and has LC connectors.