asterisk users - Nov 2010 - callerid not forwarded when transferring call from ISDN line to mobile phone via Asterisk

Hi all,

I've got 4 actors on my stage:
Alice calling from outside
Bob transferring incoming calls to Charlie
Charlie who has a mobile phone

My PBX which is connected to my ISDN line.

I want Charlie to see Alice's Callerid after Bob has transferred the 
call as if Charlie is receiving the call from  Alice, transparently.

Tried to set the callerid but Charlie sees my telco line number, not the 
callerid of Alice.

How can I do this?

Thank you.

Giorgio

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Giorgio
Incantalupo
Sent: Friday, November 19, 2010 9:34 AM
To: asterisk-users at lists.digium.com
Subject: [asterisk-users] callerid not forwarded when transferring call from
ISDN line to mobile phone via Asterisk

Hi all,

I've got 4 actors on my stage:
Alice calling from outside
Bob transferring incoming calls to Charlie
Charlie who has a mobile phone

My PBX which is connected to my ISDN line.

I want Charlie to see Alice's Callerid after Bob has transferred the 
call as if Charlie is receiving the call from  Alice, transparently.

Tried to set the callerid but Charlie sees my telco line number, not the 
callerid of Alice.

How can I do this?

Thank you.

Giorgio


-- 
We know that Alice and Charlie are both on external trunks.  We DON'T know
what flavor of Asterisk you are using, but it probably doesn't matter your
call is going like this
ID #1 --> asterisk --> destination.  
If destination were internal, ID#1 would remain intact, but since you are
opening a new trunk to forward the call, you lose ID#2 and replace it with
your Telco ID.  You could "spoof" this depending on your asterisk
version/telco arrangement, but by default, things are as you described.