WARNING - chan_sip.c: Timeout

Hello folks,

What you need to know

  • I am a beginner at VoIP.
  • Phone system is working OK.
  • Working on Sangoma FreePBX system.


  • Callers have to press twice the same option to reach the actual line. The firs time is says: We haven’t received a valid response.

I read online that it can be related to NATing, I am not sure why and how, if someone could direct me to KB or threads. Most of the time, I am redirected to retran warning message which is not my case.

The warning come every 2 minutes.

No changes have been done since a long time.

WARNING[4548] chan_sip.c: Timeout on removed on non-critical invite transaction.

This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.