Media Termination Point and Transcoding - do I need to use one?

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Dec 14th, 2009
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Hello All,


            I'am setting up a CUCM 7.0 deployment using CUBE.  I'am doing a sip trunk to the CUBE.  The CUBE to every destination region is G.729 and all internal calls are g.711.  My question is the need for a media termination point.  I guess I just need the media termination point demistified,  I know it can also function as a transcoder.  The SIP trunk is going to be transcoded to g.729 at CUCM so that means I would need to have the box , media termination point required, checked?  I'am doing H323 internally to all other gateways. Thanks


Jason

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Volodymyr Morskyy Mon, 12/14/2009 - 08:08
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AFAIK if your endpoints(phones) are supporting G729, there is no need in transcoding(in your case no transcoding is needed over the trunk).

If you are making an Ad-Hoc conference in HQ based on software conference bridge of your CUCM (G711 only) then you'll need to have a transcoder in HQ.

Seems like I answered just a part of your question)

Jaime Valencia Mon, 12/14/2009 - 08:21
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" I guess I just need the media termination point demistified,  I know it can also function as a transcoder. " NO

An XCODER can work as an MTP, but an MTP CANNOT work as an XCODER.


This link discusses the MTP funtion and SIP trunk + MTP requirements:

Media Termination Point (MTP)

http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/srnd/7x/media.html#wp1046314


Read the section:

SIP Trunk MTP Requirements


HTH

java

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