Avoid RTP traffic until both parties have exchange SDP (media IP & port)
Hi all:
We have a VoIP peer carrier connected to us using ACME 4500HA SBC. It offers us calls for PSTN termination. When the call is offered to us, upon receiving the INVITE with SDP we send RTP traffic to IP/port offered in the INVITE by the carrier even before we send the 18x with SDP or 200OK. This is a default behaviour of our PSTN media gateways. Customer wants to start receiving RTP traffic when the they receive a 18x with SDP or 200OK. Unfortunately we cannot change the PSTN MGW behaviour so we wonder if there is any possible action