183 session progress

  1. RTP before OK

    On prem 3CX v18. We have a persisstant issue with inbound calls which presents as 1 way audio. We do not use IVR / Digital receptionist so all calls are directed to a group, all members of group are local extensions running 3CX client. In simple terms, caller rings, we answer and hear them but...
  2. krossh

    V20 3CX Not Responding to 183 Session Progress

    We recently upgraded some of our versions to V20 as the deadline is coming around next month. Has anyone else had any issues with 183 early media? Extension Dials (XXX) XXX-XXXX as 10 digit, This being a LD call should be dialed as 11. ---------V20---------- -Send SIP 183 Session Progress to...
  3. krossh

    V20 3CX Not Responding to 183 Session Progress

    We recently upgraded some of our versions to V20 as the deadline is coming around next month. Has anyone else had any issues with 183 early media? Extension Dials (XXX) XXX-XXXX as 10 digit, This being a LD call should be dialed as 11. ---------V20---------- -Send SIP 183 Session Progress to...
  4. anthony0030

    No Ringing on some external calls

    I am running the latest firmware 18.0 (Build 314) on my server that is running on a raspberry pi locally. The firewall tests pass with no problems. I am using a Cosmote internet line with its SIP trunk. I sometimes don't hear the ringing sound when calling an external number. I did some packet...