MGCP gateway and transcoder/MTP/CFB on separated routers

[Alexandr Makarov]

Hello everybody!

Can I accommodate mgcp and transcoding on different routers? 

What restrictions and recommendations for this? 

Thanks in advance.

[Suresh Hudda · Accepted solution]

Yes, you can. Transcoder resources are controlled by cucm only, it doesn't depend on specific router/mgcp.

Suresh

[Jitender Bhandari · Accepted solution]

Hi Alexandr

MGCP is signalling protocol used for call setup.

Transcoding is used when there is a codec mismatch.

For can register a gateway as MGCP to CUCM and at the same time if you have DSP on it you can setup Transcoding functionality. MGCP would used MGCP stack on the gateway while Transcoding would utilize SCCP stack on the gateway. Both protocols can run simultaneously on one voice gateway with any issue.

Below are example of sample MGCP config.

http://www.cisco.com/c/en/us/support/docs/voice/media-gateway-control-protocol-mgcp/23966-mgcp-pri-cm.html

http://www.cisco.com/c/en/us/td/docs/ios/voice/mgcp/configuration/guide/12_4t/vm_12_4t_book/vm_mgcp_basic_cfg.pdf

http://www.cisco.com/c/en/us/support/docs/voice-unified-communications/unified-communications-manager-callmanager/42105-vg200-cfg.html

Below are some example of Trancodinf config which uses SCCP.

http://www.cisco.com/c/en/us/support/docs/voice-unified-communications/unified-communications-manager-callmanager/62959-ccm-ios-dsp-farm.html

http://www.cisco.com/c/en/us/support/docs/voice-unified-communications/unified-communications-manager-callmanager/112148-mtp-config.html?referring_site=RE&pos=2&page=http://www.cisco.com/c/en/us/support/docs/voice-unified-communications/unified-communications-manager-callmanager/62959-ccm-ios-dsp-farm.html

HTH

JB

[Alexandr Makarov]

Hello thank you for your answers, it very helpful!

I had one mgcp gateway with PRI E1 and about five remote sites which use this PRI for calls and have connection by g729 codec. Few days ago I moved PRI to another gateway (Media resources remain on the old gateway and registered fine) after that users stopped hearing voice. I tried to understand what wrong and today configured g711 codec between Regions and users became hear fine.   

I think I will still troubleshoot transcoding , assuming he does not work. Thanks again for your answers.