I have a situation with a IPFAS trunkgroup in PGW, where sometimes the calling number (A-number) is missing. In those cases I would like to send a default number on the outgoing trunk.
I tried the Default PN property on the trunkgroup, but it worked completely opposite to what it's description claims to.
*.DefaultPN : Enables the incoming trunk group to have a default PN if the incoming call does not have one, overdecadic digits are supported. Valid values: overdecadic digit string from 1 through 20 digits.
When there was no calling number it did nothing, and when there was one it overwrote it with the default PN.
Any ideas on how to accomplish this task. I can do some longer digit manipulation to achieve it, but it will be great to do it with the default PN property or something similar.