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Cisco MGX 8950 Hardware Installation Guide
Release 3, Part Number 78-14147-02 Rev. A0, November 2002
Chapter 1 Product Overview
System Hardware Components
AXSM
The AXSMs are service modules that provide either ATM Network-to-Network Interfaces (NNIs) or
ATM User-to-Network Interfaces (UNIs). The AXSMs have serial link connections to the PXM45,
providing a data rate of up to 2.488
Gbps per AXSM.
Table 1-4 provides information about each AXSM, its interfaces, and its corresponding back cards.
Keep the following guidelines in mind when using the AXSMs:
• When you replace an AXSM model, be sure to replace it with a model that has the same port density.
If the AXSM models have different port density, special preparations must be made through the CLI
commands prior to installation.
• A combination of models can be used in the same switch, but different models cannot be used
together in an APS configuration.
• When you replace an AXSM model that is in an APS configuration, be sure to replace it only with
the same model for APS to continue to function properly. If APS is not configured, a different model
can be used as a replacement, but a supported back card must also be installed. See
Table 1-4 for
AXSM and back card compatibility.
Note For information on the AXSM software features and configurations, refer to the Cisco AXSM Software
Configuration Guide and Command Reference for MGX 8850 (PXM45) and MGX 8950.
Ta b l e 1-4 AXSMs, Interfaces, and Supported Back Cards
AXSM
Interface
Connections
Number of
Lines
Supported
Types of Lines Supported Supported Back Cards
AXSM-1-2488/B
1
1. Supports Automatic Protection Switching (APS) redundancy.
NNI 1 OC-48c or STM-16 line at 2488 Mbps • SMFLR-1-2488/B
• SMFSR-1-2488/B
• SMFXLR-1-2488/B
AXSM-4-622/B
1
NNI or UNI 4 OC-12c or STM-4 lines at 622 Mbps • SMFIR-2-622/B
• SMFLR-2-622/B
AXSM-16-155/B
1
NNI or UNI 16 OC-3c or STM-1 lines at 155 Mbps • MMF-8-155-MT/B
• SMB-4-155
• SMFIR-8-155-LC/B
• SMFLR-8-155-LC/B
AXSM-16-T3E3/B NNI or UNI 16 T3 or E3 lines • SMB-8E3
• SMB-8T3