asterisk users - May 2008 - Ideas for call back when all lines are busy

Does anyone have an example of how to solve the following problem?

Person has 3 analog lines.  The way I have the dial plan right now, if 
all lines are busy and someone attempts an outbound call, they get 
congestion. (something like this)

exten => _1NXXNXXXXXX,1,Dial(${POTS}/${EXTEN},90)
exten => _1NXXNXXXXXX,n,Congestion(5)
; POTS=Zap/G1

What I'd like to do is if the line is busy, a that person receives a 
call-back when a line becomes available.  Is this even possible?

Thanks,

Darrick
-- 
Darrick Hartman
DJH Solutions, LLC
http://www.djhsolutions.com
http://www.djhsolutions.com/wiki

Darrick Hartman (lists) wrote:
> Does anyone have an example of how to solve the following problem?
>
> Person has 3 analog lines.  The way I have the dial plan right now, if 
> all lines are busy and someone attempts an outbound call, they get 
> congestion. (something like this)
>
> exten => _1NXXNXXXXXX,1,Dial(${POTS}/${EXTEN},90)
> exten => _1NXXNXXXXXX,n,Congestion(5)
> ; POTS=Zap/G1
>
> What I'd like to do is if the line is busy, a that person receives a 
> call-back when a line becomes available.  Is this even possible?
>
> Thanks,
>
> Darrick
>   
Yes, check out ChanIsAvail()

Darrick Hartman (lists) wrote:
> What I'd like to do is if the line is busy, a that person receives a 
> call-back when a line becomes available.  Is this even possible?
>   
Use the h extension, check for database entries that require a call 
back.  If any exist, create a drop file that calls back the extension 
contained in the database.

Doug

-- 
 
Ben Franklin quote:

"Those who would give up Essential Liberty to purchase a little Temporary
Safety, deserve neither Liberty nor Safety."