There 3 types of MTP
1) CCM software ( Media Streaming App)
2) IOS software
3) IOS hardware
I have some clients who use SIP trunk (w req. MTP) from CUCM to Service Provider and MGCP controlled FXS ports
hint: Service provider uses NON CISCO equpment, and for some reasons client doesn't use CUBE!
thera are a lot of problems with fax & modems.
I do some tests and get a some positive results only when switched off all fax/modem feature t.38/fax-pass/modem-pass and use g711 codec.
standard t.38 won't work
Is there a document which describes features that supported on SIP/H.323 trunk with MTP ( ability to use fax t.38, pass thru, modem passthru, dtmf-relay) with non Cisco devices on the SP side?