[asterisk-users] No remote address on RTP instance - On Ringing

[jg]

> Maybe the ringtone from downstream is not
> reaching asterisk, and thus a2billing is appending the `m` to the dial
> command?
With digital systems (starting with ISDN, or so), "ringing" is signaled, or indicated. The 
ringtone is produced locally, either by the PBX or by the SIP phone itself. Since you do get the 
"invitation", everything is fine.

If you really can't remove the "m", you could still use an audio file with a funny ringtone and 
stuff this into an moh class. Dirty, but it will work.

jg