[asterisk-users] NFAS Not Passing Audio on B-chan 48,72,96

[Kristian Kielhofner]

Steve Totaro wrote:
> 
> It did but I was getting no audio on those channels so I removed them in 
> hopes that the telco would not try to send call to those channels as a 
> temporary fix while I track down the cause of the problem.  How can I 
> just busyout those channels (48,72,96) so that calls are not sent to 
> them from Global Crossing?
> 
> I have a DS3 and seven servers running NFAS, I do not care about the 3 
> lost channels per trunkgroup but I do care about customers calling in 
> and getting dead air. Global Crossing charges us $100 per D chan so NFAS 
> is saving us alot of money.
> 
> Thanks
> Steve Totaro

Steve,

	I'm pretty sure (and your error message makes me more confident) that 
the b channel on an incoming call is being requested by GX.  Is their 
end configured properly for NFAS?

	What happens if you turn off NFAS, and just configure each span with a 
D channel on 24,48,72,96?  See if the D channel comes up on each span 
(pri show span 1, pri show span 2, etc, etc).  My hunch is that it 
might.  If so, verify your config with them to make sure that GX has 
NFAS configured properly.

P.S. - Yes, NFAS does rock (when everyone gets it right)!

--
Kristian Kielhofner