Cisco Systems MGX 8220 Inverse Multiplexing for ATM Trun k Modules, Circuit Emulation Service Modules, Service Resource Modules

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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
•ATM UNI service modul e f o r T1, Version B (MGX-AUS M -8 T1/B)
This card provides interfaces for up to eight T1 lines, each of which can support one T1 AT M UNI
or ATM NNI plus additional su pport for standards - ba s e d I M A. Version B adds the capabil it y t o
extract clocking information from the T1/E1/IMA trunk to feed into the Cisco MGX 8800 system
clock. This supports ATM forum-compliant IMA (1.0 spec).
•ATM UNI service modul e f o r E1, Version B (MGX-AUS M -8 E1/B)
This card provides interfaces for up to eight E1 lines, each of which can support one E1 AT M UNI
or ATM NNI plus additional su pport for standards - ba s e d I M A. Version B adds the capabil it y t o
extract clocking information from the T1/E1/IMA trunk to feed into the Cisco MGX 8800 system
clock. This supports ATM forum-compliant IMA (1.0 spec).
Inverse Multiplexing for ATM Trun k Modules
•Inverse multiplexing for ATM trunk modu le—T3 to T1 (AX-IMATM-8T1/B)
This card acts as an extension of th e C isc o BPX BNI card and permits th e C isco B P X ATM trunk
to be used over multiple (up to 8) T1 lines instead of a single T3 line.
•Inverse multiplexing for ATM trunk modu le—E3 to E1 (AX-IMATM-8E1/B)
This card acts as an extension of th e C isc o BPX BNI card and permits th e C isco B P X ATM trunk
to be used over multiple (up to 8) E1 lines instead of a single E3 line.
Circuit Emulation Service Modules
•Circuit emulation service module for T1 (AX-CESM-4T1)
This card provides interfaces for up to four T1 lines, each of which is a 1.544 Mbps unstructured
synchronous data stream.
•Circuit emulation service module for E1 (AX-CESM-4E1)
This card provides interfaces for up to four E1 lines, each of which is a 2.048 Mbps unstructured
synchronous data stream.
•Circuit emulation service module for T1 (AX-CESM-8T1)
This card provides interfaces for up to eight T1 lines, each of which is a 1.544 Mbps structured or
unstructured synchronous data stream.
•Circuit emulation service module for E1 (AX-CESM-8E1)
This card provides interfaces for up to eight E1 lines, each of which is a 2.048 Mbps structured or
unstructured synchronous data stream.
Service Resource Modules
•Service resource module (AX-SRM-T1E1/B)
The optional SRM-T1E1/B provides three major fun cti ons fo r ser vice module s; bi t erro r rate teste r
(BERT) of T1 and E1 lines and ports, lo op s bac k of individual nx64 channels toward the customer
premises equipment (CPE), and 1:N redundancy for the service modules.
•Service resource module (MGX-SRM-3T3)
The SRM-3T3 provides three major functions for service modules; bit error rate tester (BERT) of
T1 and E1 lines and ports, loops back of individual nx64 channels toward the CPE, and 1:N
redundancy for the se rvice modules. The S RM-3T3 provides the ad ditional capability of supporting
multiple T1 channels ove r T3 lines on the SRM an d distributing those cha nn els to T1 service
modules in the shelf.