Voice-Related Modules; Communications Media Module (Ws-Svc-Cmm) - Cisco Catalyst 6500 Series Installation Manual

Chapter 1 Product Overview

Voice-Related Modules

Note

Communications Media Module (WS-SVC-CMM)

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This section describes these voice-related modules:
• Communications Media Module (WS-SVC-CMM), page 1-75
8-Port T1/E1 PSTN Interface Module (WS-X6608-T1/E1), page 1-80
•
24-Port FXS Analog Interface Module (WS-X6624-FXS), page 1-82
•
Specific combinations of supervisor engines and modules may not be supported
in your chassis. Refer to the release notes of the software version running on your
system for specific information on modules and supervisor engine combinations
that are not supported.
The Catalyst 6500 series Communications Media Module can support single or
multiple Cisco CallManagers in a voice-over-IP network. (See
Communications Media Module, which acts as the media gateway, uses the Media
Gateway Control Protocol (MGCP) to communicate with Cisco CallManager,
which acts as the media gateway controller (Call Agent).
You can install up to three interface modules into the base module of the
Communications Media Module. The Communications Media Module accepts
either a 6-port T1 interface module or a 6-port E1 interface module. You must use
the same types of interface modules (either all T1 modules or all E1 modules) in
the Communications Media Module; you cannot mix the interface module types.
The 6-port T1/E1 interface modules have onboard digital signal processor (DSP)
resources that allow you to connect the interfaces to the public switched telephone
network (PSTN) or private branch exchanges (PBXs) through T1 Channel Associated
Signaling (CAS) or T1/E1 ISDN Primary Rate Interface (PRI). The DSP resources
on the interface modules provide echo cancellation, transcoding, fax relay, tone
detection and generation, and jitter buffers.
The Communications Media Module provides Layer 2 forwarding only. If a
packet needs to be Layer 3 routed, it is forwarded to the default gateway.
Catalyst 6500 Series Switch Module Installation Guide
Voice-Related Modules
Figure 1-49.) The
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