External Calls - Caller ID on attended transfer

[Tim_B]

Could anyone please advise...

I have managed to get the Caller ID follow when an internal call is transferred..

e.g. internal1 calls internal2 and transfers call to internal3.. When the call is put through to internal3, they see the caller ID for internal1 correctly.

But when an external call is transferred, the caller ID still shows the phones that transferred the call.

e.g. External Calls internal2 and transfers to internal3, When the external call is put through to internal3 they see the caller ID for internal2 incorrectly.

Config:
- Account>Advanced>Caller ID Source changed from "FROM" to "PAI-RPID-FROM"
(account.1.cid_source = 4)
- features.pickup_caller_num_record.enable = 1
- phone_setting.called_party_info_display.enable = 1

Yealink T42S - FW 66.84.0.10

Can anyone please advise what im missing or if this is possible?