[Asterisk-Users] Sip provider problem or?

[Rich Adamson]

> We are running an * with 3 sip providers. Provider 1 works perfect, provider 2 also. 
But the 3:rd one is a problem. All seems
> normal until we try to make a call. The phone rings by the called party and picks is 
up and hear only silence. The caller (local
> extension on the *) still gets ring tone as of no one answer the call. The providers 
ssw treats the call as answered and get no
> errors
> 
>  
> 
> Any hints where to start looking?

Turn on sip debug from the CLI and place a test call. There should be some
pretty good clues that would tell you what's happening (or not happening).

Best guess... probably a codec incompatibility issue.