I have a problem with the phone 502 and the module expansion SPA500S, these are registered to a SIP server in the UDP port 5080 , everything works fine, unless pickup from the module expansion. when i check the SIP packets, to perform the pickup send packet to port 5060 and not to port 5080.
configuration
proxy=10.0.10.1:5080
fnc=sd+cp+blf;sub=582@$PROXY