Panasonic KX-TD500 System Reference Manual page 157

6.00 Connection with KX-TD500 System
KX-TD500 System
• Insert the modular plug of the attendant console line cord (2-conductor wiring) into the
modular jack ("TO ATLC") on the base unit.
For connection on the KX-TD500 System side, see page 2-C-9.
2-E-9