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

[mavince at optonline.net]

Your profile shows that you are running 5ESS custom PRI. Is that what your service provider told you to run? The reason I ask is that the 5ESS can run "custom" or NI-2. I mention this is that the lack of RESTART or RESTART ACK messages isn't telling the service provider's switch that the 24th B channel on the respective T1 is "Out of Service" at the Asterisk end.

Also, I'll look at the exact RESTART messages that Asterisk sends.... Technically, if the Asterisk does not RESTART or RESTART ACK the channel, the far end switch at your service provider should not put those channels in service. Under the worst case, you'll need to ask your service provider to busy out each 24th B  channel ...that's ugly, but it will stop calls from being presented on those channels. Earlier versions of the NI protocol (pre 1998) totally ignored maintenance messages.... T1 up, D-channel up.... that means all channels in service..... but that is not always true... that why the RESTART or SERVICE messages are used.

I'm setting this up in my lab tomorrow... I'll be using a Digium card but I can look at both ends of the circuit.

Mark
mavince at optonline.net

> Date: Wed, 11 Oct 2006 14:50:51 -0400
> From: Steve Totaro 
> Subject: Re: [asterisk-users] NFAS Not Passing Audio on B-chan
> 48,72,96
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> 
> Message-ID: <452D3D0B.2080005 at asteriskhelpdesk.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> 
> Kristian Kielhofner wrote:
> > Steve Totaro wrote:
> >> Kristian Kielhofner wrote:
> >>
> >>> Steve Totaro wrote:
> >>>
> >>>> I have NFAS setup on several quad port T1 cards (Sangoma).
> >>>> It mostly works well with the exception that calls coming 
> in on 
> >>>> channels 48,72, and 96 have no audio. I tried removing 
> <<<<--->>>>>. The "tricky" stuff 
> is in 
> >>> zapata.conf. Can you post that, and maybe zaptel.conf too?
> >>>
> >>> -- 
> >>> Kristian Kielhofner
<<<<<---->>>>>
> 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
> 
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