I see MTPs in use - how can I determine what endpoints are using them and why

[Keith Abbott]

Hi All,

I have been chasing some strange issues regarding audio streams routing to endpoints they shouldn't, Ultimately because they needed MTP resources that weren't available locally.

The primary issue turned out to be DTMF mismatch because some phones had RFC2833 disabled.

Refer to

https://supportforums.cisco.com/t5/ip-telephony/help-with-cucm-query-to-find-phones-with-rfc2833-disabled/td-p/3314922

I believe that issue is now resolved but I am still seeing some MTP usage, and stream-bending (RTP streams being bent out of their normal routes, to unexpected gateways) going on and am trying to figure out why.

Can anyone tell me how I can determine what endpoints are using MTP resources at a particular site and why they are being used?

thanks

[Chris Deren]

Enable performance monitor in RTMT to monitor when the MTP usage increases, then pull CM SDL traces for that time frame and review the logs for why the MTP is getting engaged.