Our new 3CX system is working very well. However we have an issue with call transfers. I believe the issue may be down to mapping of SIP fields? (We are using a VoIP provider only). We are using Yealink phones with latest firmware. (T20 and T26 models) Latest 3CX version. If an external call comes in: If I do a Blind Transfer, (<TRAN>EXT<TRAN>) the caller ID comes through fine. If I do an announced transfer, (<TRAN>EXT# talk to extension <TRAN>) it doesn’t. Instead the EXT I am transferring FROM shows on the destination phone. I'd like the end recipients handset to show to original caller ID always, not just when a blind transfer happens. Any assistance on fields to look at etc, Reinvite etc seem to have no influence. Regards, Simon.