Panasonic KX-TD500 System Reference Manual page 342

Operation
Related Features
1. Lift the handset or press the SP-PHONE button.
• You hear dial tone 1, 3, or 4.
2. Dial the feature number for "TIE Trunk Access" (Default : 7).
• You hear dial tone 1.
3. Dial the PBX code and a CO access code of the destination
PBX.
4. Dial a Tie Account Code (if required).
5. Dial the telephone number of the outside party.
1. FWD (Call Forwarding) to Trunk
This feature works with the calls coming over the Tie Line Network.
[References]
Call Forwarding to Trunk (Section 4-F-2.05, 5-D-2.05)
2. Call Transfer to Trunk
An extension user can transfer a tie call to a distant location over the CO Line
Network.
[References]
Screened Call Transfer to Trunk (Section 4-F-1.03, 5-D-1.06, 6-G-1.04)
3-F-82