Hello, since upgrading to Asterisk 1.6 and dahdi, I have been experiencing intermittent beeps during phone calls. I ran asterisk 1.4 with zaptel for years and never had this issue. The beep sound is not a full DTMF tone, just a short beep at erratic times. The beeps seem to happen most often when connected to callers using other PBX systems. Also, I noticed this most often on long distance calls, not usually with local. I have done a great deal of research into this issue and not found anything yet to resolve the problem. I would be grateful if any one can offer any suggestions on what I might try next.
Background on configuration and what I have tried:
- set dtmfmode = inband for each extension
- Set Sipura ATAs to use â€œDTMF Tx Method=InBandâ€