I'm having a hard time trying to understand your call flow, can you please provide the call flow and examples of the SIP messages already modified and/or the messages that you want to be changed? For example the first Invite, Trying and the message t...
Probably you have already tried different patterns but if you are trying with request ANY sip-header From modify "<sip:+(.*)@172.16.100.2:5060>" "<sip:+16145551212@172.16.100.2:5060>" then it won't work as the SIP profile will look for the string "<s...
First thing to check would be if your incoming calls are in fact coming through your dial-peer 100. Run a debug voice ccapi inout and verify the incoming dial-peer for the incoming call leg.
I can see your dial-peer 102 pointing to port 5070 of your ITSP SBC but the OPTIONS sip message coming from port 10.91.52.38:5060. You might need to change the destination port on the dial-peer dial-peer voice 102 voipdescription ** VG to ITSP **tran...