Sorry, Maybe I did not explain my issue clearly. In the scenario described in previuous mail:
Phone --> PSTN --> Gateway --> SER --> SIP Phone
I can recieve SIP BYE Messages both from SIP Phone or Analogue Phone (over PSTN): in the 1st case SER sends 200 OK, in the 2nd SER sends 404 Not Found SIP message. So My issue is to understand why this and how reply BYE message from Analogue Phone correctly. I hope this may be helpfully.
Thanks 4 all,
Flavio
2007/5/7, Edson 4lists@gmail.com:
"ngrep -t -W byline -d any port 5060" then find the desired BYE and send it... ;)