Hi
Have one way audio over sip trunk. when making calls internally or over BRI / FXO no issues at all. calls over SIP all end up with one way audio.
have tested with sonicwall and netgear firewalls / routers, same result. have replaced snom one mini with 3cx, changed rtp ranges and audio works great in both directions. replaced 3cx with mini and back to one way audio (obviously i have updated the rtp ranges again).
also, itsp says we ar sending this data in the sip invite. cannot see where to remove this on the mini. the itsp thinks this may have something to do with this.
“a=rtcp-xr:rcvr-rtt=all voip-metrics”
Thank you for your assistance
4.5.0.1097 Epsilon Geminids (snom ONE mini)