asterisk users - Mar 2007 - Re: Help: CallerID Name not being sent

It has been my experience when working with PRI's that you have very limited
options when dealing with outbound CID.  Due to restrictions of 911 most
Telco's  will have to have the PRI split into Trunk Groups for proper CID
delivery.  This would work for a situation of sharing one asterisk server
between 2-3 mid sized businesses and using trunk group 1 channels 1-5 for
outgoing company 1, Trunk Group 2 channels 6-10 for outgoing company 2,
Trunk Group 3 11-15 Outgoing for Company 3.  Channels 16-23 for incoming
calls and channel 24 is your switching channel.

That is if your provider will alow you to go that far with it.  This may not
be anywhere whatcha need but it may help someone.

Matt