Replace display name
From PBX Admintool > [PBX] > [Options] > [Phone Type] > (select a phone type) > [Edit Phone Type] page, please set [Update remote party ID] = invite.
Brekeke PBX will send re-invite to this user phone to replace the display name with the third user display name with a P-Asserted-Identity header when the call with this user extension is transferred to the third user or picked up by the third user.
Note: The phone needs to support re-invite and P-Asserted-Identity header.