asterisk users - Mar 2008 - Pre-pending certain digits (like 9) to an outbound call number

Hey all,

Working slowly on getting the myriad number of parts to my fax system plan
together, and one of the pieces I want to nail is how to go about, for the
outbound context (fax-out) pre-pending a digit onto a number?  I.e., for all my
testing right now, I've been dialing '91XXXXXXXXXX', as the asterisk
server doing faxing junctions into my old Rolm CBX switch, and so I need the
'9' digit to dial outside numbers.  However, for deployment, I'd
like to save the users confusion and have the server automatically append that
leading '9' digit.

That possible by chance?  I assume it is, but off the top of my head, it
didn't seem intuitive.  Below is the exten lines for my [fax-out] context,
followed by some test exten lines that wound up failing:

exten => _X.,1,Dial(Zap/g1/${EXTEN}|20)
exten => _X.,n,Busy
exten => _X.,n,Hangup

; Test appending 9?
;;exten => _9XNPANXXXXXX,1,Dial(Zap/g1/${EXTEN}|20)
;;exten => _9XNPANXXXXXX,n,Busy
;;exten => _9XNPANXXXXXX,n,Hangup


I was trying to do some basic matching to the NANP formula to catch when someone
accidentally mistypes a number, but that didn't match up and asterisk was
complaining that no exten lines in the [fax-out] context were matching.

Also, is it possible offhand to block the dialing of certain numbers in the same
context?  I.e., just as a check, to block faxes to 900 numbers?  I believe my
Rolm CBX will do this for me, as it's got a pretty extensive list of area
codes and exchanges that are known to be sinister in nature pre-loaded (probably
needs updating, though...), but I figured that if I could block it in asterisk,
to do so.  Save the Rolm a wee bit of processing and all (it is old, and
probably senile...)

That, and I'd like to filter accidental '9911...' dials using this
technique (which would dial 911 emergency, and that wouldn't be good, since
I doubt faxes are a good method of calling in an emergency (unless they have a
color fax and can discern that the red ink really isn't red ink...)).

Thoughts anyone?  Thanks!,

--Josh

-----Original Message-----
> From: Gerald A
>
> Try:
> exten => _X.,1,Dial(Zap/g1/9${EXTEN}|20)
>
> You want to add the number automagically, not match it being dialled.
Doh!</homer>

I knew it'd be simple.  I categorically blame Monday for the lapse in my
ability to have seen the obvious :P

Thanks!

Like this?

exten => _XNPANXXXXXX,1,Dial(Zap/g1/9${EXTEN}|20)

Notice it matches 18005551212 and it dials 918005551212. (The 9 before the
${EXTEN})

Moj



Joshua Kinard wrote:
> Hey all,
>
> Working slowly on getting the myriad number of parts to my fax system plan
together, and one of the pieces I want to nail is how to go about, for the
outbound context (fax-out) pre-pending a digit onto a number?  I.e., for all my
testing right now, I've been dialing '91XXXXXXXXXX', as the asterisk
server doing faxing junctions into my old Rolm CBX switch, and so I need the
'9' digit to dial outside numbers.  However, for deployment, I'd
like to save the users confusion and have the server automatically append that
leading '9' digit.
>
> That possible by chance?  I assume it is, but off the top of my head, it
didn't seem intuitive.  Below is the exten lines for my [fax-out] context,
followed by some test exten lines that wound up failing:
>
> exten => _X.,1,Dial(Zap/g1/${EXTEN}|20)
> exten => _X.,n,Busy
> exten => _X.,n,Hangup
>
> ; Test appending 9?
> ;;exten => _9XNPANXXXXXX,1,Dial(Zap/g1/${EXTEN}|20)
> ;;exten => _9XNPANXXXXXX,n,Busy
> ;;exten => _9XNPANXXXXXX,n,Hangup
>
>
> I was trying to do some basic matching to the NANP formula to catch when
someone accidentally mistypes a number, but that didn't match up and
asterisk was complaining that no exten lines in the [fax-out] context were
matching.
>
> Also, is it possible offhand to block the dialing of certain numbers in the
same context?  I.e., just as a check, to block faxes to 900 numbers?  I believe
my Rolm CBX will do this for me, as it's got a pretty extensive list of area
codes and exchanges that are known to be sinister in nature pre-loaded (probably
needs updating, though...), but I figured that if I could block it in asterisk,
to do so.  Save the Rolm a wee bit of processing and all (it is old, and
probably senile...)
>
> That, and I'd like to filter accidental '9911...' dials using
this technique (which would dial 911 emergency, and that wouldn't be good,
since I doubt faxes are a good method of calling in an emergency (unless they
have a color fax and can discern that the red ink really isn't red ink...)).
>
> Thoughts anyone?  Thanks!,
>
> --Josh
>
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