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Cisco MGX 8800/8900 Series Hardware Installation Guide
Releases 2 - 5.2, Part Number OL-4545-01, Rev. H0, May 2006
Chapter 1 Product Overviews
Cisco MGX 8850 and MGX 8850/B Switches
• Frame Relay service module (FRSM)—single-height front card
• Service resource module (SRM)—single-height front card
• Route processing module (RPM)—double-height front card
• Voice interworking service module (VISM)—single-height front card
MGX 8850 (PXM45) and MGX 8850/B (PXM45) Switch Overview
Note In this guide, PXM45, PXM45/B, and PXM45/C controller cards are identified collectively as PXM45,
unless otherwise specified.
The PXM45 controller card allows implementation of a complete range of narrow band services for
high-density edge applications and broadband aggregation with 45 Gbps of nonblocking switching. The
PXM45 can also be used exclusively for broadband aggregation and backbone functions.
Service modules support communications between non-ATM services and the ATM services on an ATM
network. All network communications or customer traffic in and out of the switch goes through the
service modules and RPM cards. When a service module or RPM is combined with a one or two back
cards, a card set is created.
The MGX 8850 (PXM45) and MGX 8850/B (PXM45) switches support the following module types:
• ATM service module (AXSM)—double-height front card
• Circuit emulation service module (CESM)—single-height front card
• Frame Relay service module (FRSM)—single- or double-height front card
• Route processing module (RPM)—double-height front card
• Service resource module (SRM)—single-height front card
• VISM—Single-height front card
Note The only VISM card supported in the Cisco MGX 8850 (PXM45) is the VISM-PR.
• VXSM—double-height front card
PXM45 Controller Card RAM and Software Release History
Updates to the PXM45 controller card included the PXM45/B and PXM45/C cards. The PXM45 RAM
and software release history is as follows:
• PXM45, introduced October 2000, with MGX Release 2 software and 128 MB RAM
• PXM45/B, introduced October 2001, with MGX Release 2.1 software and 256 MB RAM
• PXM45/C, introduced April 2003, with MGX Release 4.0 software and 512 MB RAM