asterisk users - Jan 2006 - Detecting a PRI failure from dialplan

Hi,

I would like to know if there is a way to detect the status of a span
prior of sendig a call across it from the dialplan.

I was asked to set up an * server with 2 spans connected to the telco and use
the second as
failover for the first.

I checked that dialing a failed span (for instance: cable disconnected or
no line) results in "congestion" for ${DIALSTATUS}, but message is too
generic for my use.

Any suggestion will be greatly appreciated, tnx!
  

-- 
Best regards,
 Alessio                          mailto:afoc@interconnessioni.it

On 20 Jan 2006, at 11:49, Alessio Focardi wrote:
> Hi,
>
> I would like to know if there is a way to detect the status of a span
> prior of sendig a call across it from the dialplan.
>
> I was asked to set up an * server with 2 spans connected to the  
> telco and use the second as
> failover for the first.
>
> I checked that dialing a failed span (for instance: cable  
> disconnected or
> no line) results in "congestion" for ${DIALSTATUS}, but message
is too
> generic for my use.
>
> Any suggestion will be greatly appreciated, tnx!
I find the best way to check the status of a PRI is to look in
/proc/zaptel/1 or /proc/zaptel/2 etc

You'd have to do some work integrating this into the dialplan,
but you could set a global variable or something.

Tim.

http://www.westhawk.co.uk/

-------------- next part --------------
An HTML attachment was scrubbed...
URL:
http://lists.digium.com/pipermail/asterisk-users/attachments/20060120/41452a80/attachment.htm

> On 20 Jan 2006, at 11:49, Alessio Focardi wrote:
> 
> > Hi,
> >
> > I would like to know if there is a way to detect the status of a span
> > prior of sendig a call across it from the dialplan.
> I find the best way to check the status of a PRI is to look in
> /proc/zaptel/1 or /proc/zaptel/2 etc
> 
> You'd have to do some work integrating this into the dialplan,
> but you could set a global variable or something.
Tnx, this is what I was fearing from the start ... :)

What about hangup codes ? I still have to understand if they can be parsed after
dial or just by "h" extension ...

Regards!

> I would like to know if there is a way to detect the status of a span
> prior of sendig a call across it from the dialplan.
>
> I was asked to set up an * server with 2 spans connected to the telco and
use the second as
> failover for the first.
>
> I checked that dialing a failed span (for instance: cable disconnected or
> no line) results in "congestion" for ${DIALSTATUS}, but message
is too
> generic for my use.
Have you checked what happens if you put both PRI lines in a single ZAP
group
and refer to it as a Dial(ZAP/g1/${EXTEN}) ?
I my opinion asterisk should automatically know that the first 30 B channels
are dead
and try the remaining live ones. I haven't tested it with PRI, but I'm
pretty sure it works
that way for BRI (HFC card - zaphfc module).

Ivan