Please follow the following scenario. I have a SIP Trunk on CUCM. That SIP trunk has an MRGL with HW MTPs (SW IOS BASED MTPs) in a MRG-A and SW MTPs (SW on IPVMS) on MRG-B. Let say for example that I have Type A Phones 7940/7960/etc. If I checked MTP Required on the SIP Trunk then CUCM chooses the MTPs based on the MRGL of the trunk and selects the HW MTPs (IOS based). But if instead of checking the MTP Required on the SIP Trunk I decided to enable "Early Offer support for voice and video calls (insert MTP if needed)" on the SIP Profile for the SIP Trunk (as it seems that is the best option now for not using MTP all the time) then when checking the calls setup CUCM always insert an MTP from the IPVMS instead of using the same MRGL logic and using the HW MTP.
My question is if using "Early Offer support for voice and video calls (insert MTP if needed)" on the SIP Trunk. Where does CUCM decides to pick the MTP from? Using the originating device MRGL? or using the SIP Trunk MRGL?
Thanks in advanced and sorry if that was already answered here.