I have a CUCM 6.1 cluster whit 200 phones and i have the follow configuration:
CUCM Group: Stgo
Device Pool: Stgo
-CUCM group: Stgo
And all endpoint have the same Device Pool (Stgo) and the same MRGL (MRGL_Stgo), and one time at week user can not make transfer and conference and when restart the service Cisco IP Voice Media Streaming App the problems it's OK.
You shouldn't need MTP resources at all, unless you have old H.323 GW that needs them, or SIP phones making external calls that need DTMF translation. The fact that they are running out might be a bug, but maybe a config change can avoid it.
Run RTMT to monitor the MTP resources and see if that shows high utilization. A TAC case might be helpful if you are not making progress.
We have this issue as well though in our case we do have a SIP Trunk to a voice recorder. We are also running 6.1.x. In our system we have SW MTP`s configured as part f the install not registered, I activated the service IP Media streaming .... but the MTP do not register- does this happen in yours?
These are the paths to get to each CCX logs through CLI. They may be helpful if you are having issues accessing RTMT or downloading logs through it.
If you want to download them you have to prefix "file get " and you can add one of the options (re...