Running build 220.127.116.11 (compiled from source) I seem to be having an issue
with codec negotiation. I have a Grandstream HT503 FXO port connected to a
pstn line, a Polycom SP501, and a SIP trunk with callwithus.
What I’m essentially looking to accomplish is for ulaw or g729 (preferably
ulaw) to be used to the Grandstream FXO or any other internal endpoint, and
for g729 only to be used outbound to my SIP trunk.
Here are the basics of my config, showing the codec list from “sip show peer
Polycom SP501 (desk phone):