Call forward, getting callerid

[r2d22y]

Hello

Lets say I have 2 CCM phones (P1 & P2)
P2 has call "forward when busy" and this number is used by an SIP trunk i.e if P2 is busy it should redirect to nr 23XXXX which a route pattern takes care of and send it via my SIP-Trunk to an Asterisk.

Lets say now that P1 making a call to P2 (which is busy) a "call forward" is made to nr that go through my SIP-trunk to an Asterisk.

Then the sip request looks like
from: P1_id@ip_of_my_CCM
to: 231111@ip_of_my_asterisk

i.e their is no information about P2 is between those 2 devices.

Is their a setting in CCM I can set so I can get information about that current call is a "call forward" or/and by who this "call forward" has been made by?

In my DN XXXX of my devices P1 & P2 under the meny "Forwarded call display" I have checked all alternatives.

Regards /D_S

 

[r2d22y]

Found it

In SIP-trunk settings there are some interresting options:

Redirecting Number Delivery