Panasonic KX-TD500 System Reference Manual page 632

Operation
Setting Call Forwarding-Busy/Off-Hook
1. Lift the handset.
2. Dial the feature number for "Call
Forwarding-Busy Set" (Default :
**3).
3. Dial the directory number of the
extension or the Voice Mail
ports,or the "FDN for General
Operator Call" to be set as the
destination.
• You hear confirmation tone 1 or
2 and then dial tone 1, 3, or 4.
4. Replace the handset.
Canceling Call Forwarding-Busy/Off-Hook
1. Lift the handset.
2. Dial the feature number for "Call
Forwarding/Do Not Disturb
Cancel" (Default : ##0).
• You hear confirmation tone 1 or
3. Replace the handset.
5-D-14
2 and then dial tone 1, 3, or 4.