Transcoding for CallManager Express

CME supports DSPs for transcoding. It does not support DSP-based conference bridges at this time. The configuration is similar to registering DSPs to a CallManager. The IP address used in the sccp ccm command is the IP address of the CME service. This should match the ip source-address specified under telephony-service.

After you have completed Step 6 for C549 DSPs or Step 8 for C5510 DSPs, the following steps register the transcoders to CME:

Step 1.

Enter telephony-service configuration mode.


Step 2.

Set the maximum number of DSP farms that can be registered to CME.

GW_2811(config-telephony)#sdspfarm units number

A CME can support up to five transcoder sessions. These can be locally defined transcoders on the CME gateway or DSPs that are defined on other gateways.

Step 3.

Specify the maximum number of transcoding sessions supported across all registered transcoders.

GW_2811(config-telephony)#sdspfarm transcode sessions number

This is the total number of sessions provided by all registered transcoders. Valid entries are 1 through 128.

Step 4.

Specify the name of the DSP farm.

GW_2811(config-telephony)#sdspfarm tag number device-name

The device name follows the same rules as CallManager registrations. For C549 DSPs, the device-name is "MTP" plus the MAC address of the SCCP local interface. For C5510 DSPs, the device-name is specified when you associate the transcoder profile to the ccm group.

Case Study Add DSP Resources to the Miami Gateway

Part I: Voice Gateways and Gatekeepers

Gateways and Gatekeepers

Part II: Gateways

Media Gateway Control Protocol


Session Initiation Protocol

Circuit Options

Connecting to the PSTN

Connecting to PBXs

Connecting to an IP WAN

Dial Plans

Digit Manipulation

Influencing Path Selection

Configuring Class of Restrictions

SRST and MGCP Gateway Fallback

DSP Resources

Using Tcl Scripts and VoiceXML

Part III: Gatekeepers

Deploying Gatekeepers

Gatekeeper Configuration

Part IV: IP-to-IP Gateways

Cisco Multiservice IP-to-IP Gateway

Appendix A. Answers to Chapter-Ending Review Questions


Cisco Voice Gateways and Gatekeepers
Cisco Voice Gateways and Gatekeepers
ISBN: 158705258X
EAN: 2147483647
Year: 2004
Pages: 218 © 2008-2020.
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