Unrestricted call forwarding should send original A-number to provider

[berndt]

Hello

We are trying to integrate our 3CX pbx to Telia provider in Finland.

One of the requirements is that diverted calls with an unrestricted call forwarding should be send original A number in from header and redirecting number in history-info header (RFC7044). This is for external call forwards. This way the forwarded number will get the original caller's ID.
Can this be done in 3CX?

Best regards

Berndt Johansson

 

[leejor]

Here is a link to a thread on the subject, from a couple of years ago. make note of the comments about the type of forwarding being implemented and the difference in the caller ID sent. Of course, recent versions of the PBX may have changed that behavior.

https://www.3cx.com/community/threads/caller-id-displayed-during-call-forwarding.81267/

 

[berndt]

According to technical information from Telia the caller ID should be set to OriginatorCallerId in the From field but they require the redirecting number in fhe history-info or diversion header. History-info header is RFC7044. Do you have any clue how to control history-info header? I don't find any matching settings in outbound parameters.