Hi, I have 2 systems running 3CX v11 and recently installed SP1. Both systems are running Yealink T28P and T22p phones. The problem I am having is a bit weird and only happened after SP1 was installed. If someone transfers a call (external or internal) the cant use the resume button to take the call back. When you press the resume button after the call has been transferred (and started ringing on the other ext) it just changes from "resume" to "hold" but it still rings on the other end. The only way you can pull the call back is to use the expansion module on the T28P's or choosing another line and pulling it back with *20*. Please can someone please help me to get the resume function working again.