Attended Transfer greyed out in CTI Mode

[smartdial]

I'm using 3cx Phone for Windows V14 and a Yealink T46G

When in CTI mode the Attended transfer is greyed out.

Any ideas?

 

[David10]

Features are normally grayed out when they aren't supported or available.

 

[NickD_3CX]

Is the T46 a remote STUN extension?

Attended transfer is available when:
- The deskphone is either a Local Extension or through a 3CX SBC.
and
- The 3CXPhone app is on the same LAN as the deksphone and they can directly communicate with each other.