For example, custom message number 16 on system A is On Conference Call
and custom message number 16 on system B is Talking to Boss.
If a user on system A posts custom message #16, the user's telephone displays On Conference Call.
If someone on system B calls the user on system A, Posted Messages sends message number 16 to the caller. The system of the caller converts number 16 into a message. The telephone of the caller displays Talking to Boss
.