CHAPT ER
2-1
Cisco MGX 8230 Edge Concentrator Installation and Configuration
Release 1.1.31, Part Number 78-11215-03 Rev. B0, May 2001
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Module and Service Descriptions
This chapter includes detailed descriptions of the modules, cards and services available with the
MGX 8230:
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: The VISM, page 2-55.
Note Although the illustrations in th is c ha pter display the equipment in a vertical position, the card s and
modules are rotated 90 degrees (to a horizontal position) when ins talled in the MGX 8230 back card
slots. See the MGX 8230 Enclosure and Power section on page1-4 for more information on slot
assignments and module installation.

Processor Switching Module

The PXM1 card set consists of the PXM1 fro nt car d , th e PX M1 U ser Inte rface 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 AppendixA, Technical Specifications.
Caution Handle the PXM1 front card very carefully to preserve the alignment of the attached disk drive. Do
not drop or bump the PX M 1 .
Caution Before using the 8230, verify tha t the d aughte r card on the PXM1 corres ponds t o the up link ca rd typ e.
Serious damage may result if t he power i s o n a nd t hese cards are mismatched.
Note The PXM1 processor module for the MGX 8230 is identical to the PXM1 for the MGX 8250.