[Asterisk-Users] Got SIP response 405 "Method not acceptable" backfrom xxx.xxx.xxx.xxx

[Kevin P. Fleming]

William Piper wrote:
> If you don't need to authenticate, then you don't need a register command.
> Get rid of register => whatever and just have:
> exten => _X.,1,dial,SIP/${EXTEN}@carrier

Registration and authentication are not the same thing. Registration is
required for the carrier to be able to deliver calls _to_ his system. It
is possible though that if he is using a static IP, then the carrier
saying they 'authenticate by IP' may very well mean that you are
correct, that registration is not needed _either_ and they are rejecting
the REGISTER request completely.

To the original poster: please post a 'sip debug'/'set debug 10' console
trace of this failing registration attempt (but nothing else), so we can
see what is actually happening.