Panasonic KX-TVS50 Installation Manual page 343

MESSAGE MANAGER'S GUIDE
Note
If you hear "Call Forwarding not accepted. Please check the destination number", the
forwarding setting has not been completed properly at the PBX, possibly because a
nonexistent extension number has been entered as the destination. It is also possible
that the model of the connected PBX does not support the Remote Call Forwarding
Set, or its software version is lower than required; for more information, call National
Parts Center at 1-800-833-9626.
Installation Manual 343