Outbound trunk for a calling card. Freepbx + Asterisk 1.8


I would like to set up an outbound trunk that uses a calling card that I have from AT&T.

I’ve set up a custom sip trunk with a custom dial string as follows:


I then set up an outbound route to point to the above custom trunk.

I was hoping my dial string would achieve the following:
-dial out one of my SIP trunks to an 800 number for the carrier,
-pause for a few seconds and then
-dial the outbound number followed by a #
-then dial the calling card pin…

Unfortunately, This does not work.

I’ve done a lot of searching but everything I’ve found about calling cards is in reference to A2Billing which I don’t believe applies.

Has anybody else done this or have a suggestion?

Many Thanks,