Yealink T46U Calls Transferred Disconnected

[clarkhoward85]

Hello,
I have a remote PBX over a VPN and my T46U Yealink phone is having problems with transfers. I can put callers on hold and come back to them, but when i attempt to transfer to another extension, they go on hold, there is hold music, then they are hung up on after a few moments.

SipLeg(ads{1849}) C:54.3
12/08/2025 9:48:37.054 PM	Lsip{1849/54.3/Inv*[Terminated&AnswerSent]} on destroy
12/08/2025 9:48:37.054 PM	~CallLeg(C:54.3); ads{1849}
12/08/2025 9:48:37.054 PM	~CallLeg(C:54.1); ads{1845}
12/08/2025 9:48:37.054 PM	~Call(C:54)
12/08/2025 9:48:37.054 PM	L:54.3[Extn:701{00000000-01dc-68b6-3ae3-882300000099}] detached from call; ads{1849}
12/08/2025 9:48:37.054 PM	L:54.3[Extn:701{00000000-01dc-68b6-3ae3-882300000099}]: CONNECTION ID updated: 268 => 0
12/08/2025 9:48:37.054 PM	Reported(Delete): SE:54.3{OnHook}

I see this in my call logs, but not certain where exactly to start with troubleshooting or what to do.

I can make and receive calls fine, it is just transferring that is the problem.

Thanks for the help.

 

[KyriacosS_3CX]

Switch to an SBC setup if at all possible.

 

[clarkhoward85]

Strangely, the issue was related to wireguard. I fixed it by allowing just the IP from the phone into the wireguard server where the phone is located. Everything works perfect now!