Panasonic KX-TDA600 Installation Manual page 193

2.9.1 Maximum Cabling Distances of the Extension Wiring (Twisted Cable)
PT-interface
CS DSS
DPT APT SLT
(Basic/ Console
High-density)
DLC16, DLC8 Cards
ü ü ü
"ü" indicates that the extension card supports the terminal.
Installation Manual 193