Refer to the Exhibit. An agent initiated a video call but was establish as audio only.
The support engineer collected and analysed the Cisco Unified CM traces.
Which two options caused this problem? (Choose two)
A. A hardware MTP was assigned to the call
B. SIP Notify DTMF was requested and negotiated
C. MTP required was checked on the SIP Trunks
D. Use Trusted Relay Point is set on one of the phone
E. MRGL assigned to phones with Trusted Relay Point
C,D
MTP Required = Y
Use TRP = Y
Call Behavior = Audio call only because no pass-through support exists.
MTP Required = Y
Use TRP = N
Call Behavior = Audio call only. No TRP support.
MTP Required = N
Use TRP = Y
Call Behavior = Audio or video call depends on endpoint capabilities, and call admission control (CAC). Supplementary services still work.
MTP Required = N
Use TRP = N
Call Behavior = Audio or video call. Supplementary services still work, but no TRP support exists.
I think AC.
I think it is CD, since we see that this Invite is coming from CUCM (User-Agent header). Also we see that CUCM IP address is 10.16.100.50 (Via header), and the same IP address is used in SDP. So it is C definitely and not A. And the other is D since TRP does not support Video.
it should be AC i think