show caller and callee ID on forwarded calls

Hi,

I want to show both the caller ID and the callee ID of a call, that is being forwarded to another internal destination. I am running T46G on 3cx.

I know, that I can display the caller (A) or the callee ID (B) on the forward destination Phone ©. But what I want is to display both the callerID and the callee ID (like "A->B" or "A->B->C"). The person answering the phone wants to know, who is calling and who is he trying to call.

The forward is done locally on the phone.
I tried a lot of things, and several experts already have told me, it can't be done, but there is a feature described in the Yealink documents, that look like what I am looking for:

Quote:IP phones support the redirected call information sent by the SIP server with Diversion header, per draft-levy-sip-diversion-08, or History-info header, per RFC 4244. The Diversion/History-info header is used to inform the IP phone of a call’s history. For example, when a phone has been set to enable call forward, the Diversion/History-info header allows the receiving phone to indicate who the call was from, and from which phone number it was forwarded. This is page 189 Yealink_SIP-T4X_IP_Phones_Administrator_Guide_V73_40

and

Quote:Optimized the Forward Diversion feature of BroadWorks. Description: According to the header of Diversion and History-info, show the value in the GUI when incoming forward call
in http://www.yealink.com/Upload/UCOne/Yeal...ion-71.pdf

But I don't know how to set it up.
Anybody can help me?

Best regards Frank