Hi Nipun,   Thanks for your reply.   CUCM is sending DF bit set to "Do Not Fragment" so I'm thinking that this packet would be dropped by the originating DMVPN headend router rather than being fragmented. The TAC engineer on gateway team confirm that...

Hi Team,   Currently having the same issue across DMVPN tunnel.  CUCM reinvites are not been seen by Voice Gateway running SIP, CUCM is at the hub site while the voice gateway is at the remote site.  When CUCM initiates a message it uses TCP however ...

old thread however I combed through here trying to solve this problem so I am updating with a solution: https://supportforums.cisco.com/t5/ip-telephony/8831-on-srst-only-sending-one-dialed-digit/td-p/2793771    View thread above.  no digit collect kp...

Hi Mohamed, What was the fix in the end of it all?

Thanks for the information Patrick.  It was helpful.