[Asterisk-Users] Can't dial "Free World Dialup"--Loop Detected

[Mark Spencer]

> It didn't work.  I sniffed the connection, and it looks like asterisk
> sends out an invite.  The gateway at FWD then sends an Invite back, and
> then asterisk responds with a "482 Loop Detected" error message.

According to your log, FWD is sending the call back to us with the same
Call-ID.  SIP does not support the idea of having a call up with both ends
on the same machine (and the same Call-ID) because there is no way to
differentiate one end from the other.  I.E. you can't call yourself with
SIP.

Mark