[asterisk-users] Billing number vs. CallerID number | Asterisk 11.5.1

[Eric Wieling]

Often it is P-Asserted-ID, but depends on the carrier.  You should be asking your carrier how to do this.   Be careful, if the carrier doesn't like your CID spoofing they might bill the call to a default number on the account.

I suspect it is the destination which is rejecting the call because toll free numbers are not considered valid, not your carrier rejecting the call.

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Positively Optimistic
Sent: Monday, March 17, 2014 4:47 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: [asterisk-users] Billing number vs. CallerID number | Asterisk 11.5.1

In a multi-tenant environment, we are sending various CallerIDs outbound from asterisk based on who the user is.  We have an insurance agency who would like to present a toll free callerid.  This works..  unless they're calling a toll free number.  In that case, occasionally, the call fails.  However, should we send a correctly formatted npanxx of a local number, the call completes.  

We have been advised that we can send the billing telephone number as a separate header and the call will complete, all-the-while, presenting the toll free number as the caller id.    

Does anyone know of the correct header required to provide this functionality?