CCM transcoder registration question

Unanswered Question
Aug 5th, 2008

WE have been troubleshooting a complex issue by where transcoder is not being invoked for WAN calls. TAC has recommended we attempt to take the transcoder registration off callmanager, and put this transcoder solely registered to the h323 gateway. Is that possible? I know if we were running CME it would be done this way, but is it possible when using CCM with h323 gateway?

Our problem is we need an MTP for supplementary services (other side doesn't support h323 v2). So we have the MTP checkbox selected on gateway page in CCM. Region between phones and software MTP is G711. Region between phones and MTP-Xcode is G711. Region between gateway and MTP's is G711. Gateway is set to use G729. Trace files reveal that the transcoder is not being invoked.

Regards,

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Marwan ALshawi Mon, 08/11/2008 - 06:11

just make sure u have enough DSP resources for ur voip network

u can use a calculator on cisco.com

called dsp calculator which is helpful even it gives u the required command

and then define the transcoder and MTP on ur CCM after configured on the gateway

the following link will guid u through a step by step configuration example which is very usefull

http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_configuration_example09186a0080334294.shtml

good luck

please, if helpful rate

espereir Tue, 08/12/2008 - 00:03

Hi Daniel,

Could you please explain what the problem is? Since as per the case notes it seems that we just need an XCODE for the calls from the GW among the other regions; other than that, the GW must have a MRGL on CCM with a transcoder and software MTPs for it to support the call.

Thanks and please keep us posted!

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