Panasonic HYBRID IP-PBX KX-TDA50 - Manual (Page 68)

2.4 Information about the Extension Cards
68 Installation Manual
2.4.3 SLC4 Card (KX-TDA5173)
Function
4-port extension card for SLTs.
Accessories and User-supplied Items
Accessories (included): Extension Bolt × 1, Strap × 1
User-supplied (not included): RJ11 connector
Pin Assignments
RJ11 Connector
Signal Name Function
T Tip
R Ring
– Reserved
To extension
RJ11
4 1
R T