asterisk users - Oct 2008 - International calls/pridialplan from a legacy PBX.

Hi, all.  This e-mail is a follow-up to an exchange I had several weeks
ago.  I've got an Asterisk box with a dual-span T1 card.  I want to place
it between the PSTN and my company's legacy PBX.  I actually did do that,
but international calls from the legacy PBX were having the "011"
stripped
off *AT* the PBX -- and someone pointed out that the PBX was probably
using the Asterisk equivalent of pridialplan.  Which makes sense.  But as
far as I can tell, pridialplan is used to *signal* the PSTN -- but there
doesn't appear to be any way to detect it, in Asterisk, from another
switch.

Is that true?

Because, if I can't detect it, I have no other way of determining whether
or not a call from the legacy PBX is international or not, and pretty much
puts the kibosh on my Asterisk plans.  OTOH, if there is a way to detect
it, I'm home free.

Suggestions greatly appreciated!

Thanks,

-Ken

On Thursday 16 October 2008 13:38:00 Ken D'Ambrosio
wrote:
> Hi, all.  This e-mail is a follow-up to an exchange I had several weeks
> ago.  I've got an Asterisk box with a dual-span T1 card.  I want to
place
> it between the PSTN and my company's legacy PBX.  I actually did do
that,
> but international calls from the legacy PBX were having the "011"
stripped
> off *AT* the PBX -- and someone pointed out that the PBX was probably
> using the Asterisk equivalent of pridialplan.  Which makes sense.  But as
> far as I can tell, pridialplan is used to *signal* the PSTN -- but there
> doesn't appear to be any way to detect it, in Asterisk, from another
> switch.
>
> Is that true?
>
> Because, if I can't detect it, I have no other way of determining
whether
> or not a call from the legacy PBX is international or not, and pretty much
> puts the kibosh on my Asterisk plans.  OTOH, if there is a way to detect
> it, I'm home free.
Check ${CALLERID(ton)} (type of number).  It should be 0 for unknown, 1 for
international, and 2 for national.  Other possible values are 3, 4, 6, and 7,
though you shouldn't see those too often.

-- 
Tilghman