I have "Early Offer support for voice and video calls (insert MTP if needed)" on the sip profile for the sip trunk to the CUBE, and "inbound fast start" enabled for the H323 VGW. This setup solved an issue with ringback on outbound calls.
My question is when MTP is invoked, which MRGL is used to select the MTP resource? The MRGL on the SIP Trunk or the MRGL on the H323 VGW?
So is the call coming from a device on the Remote GW that has an H323 trunk to CUCM? Inbound fast start calls to CUCM do not require an MTP, only outbound faststart connections do. So based on your call flow above - a call going out the SIP trunk to your CUBE would require an MTP if doing early-offer.
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The short answer is that you don't.... That isn't entirely true while at
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Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...