Panasonic KX-TD500 Installation Manual page 71

2.4.6 Cable Pin Numbers for Extension Lines
The meanings of the pin names
T: Tip D1: Data 1
R: Ring D2: Data 2
Cable color examples
The line of pin no.26: ORN-RED
red
The line of pin no.25: WHT-BLK
black
Working pins for the various telephones or DSS consoles
Working
Not working
Single Line Telephone
APT
DPT without XDP
P1: 3 Pair Voice
P2: 3 Pair Voice
orange line
white line
DSS Console
T
R
D1
T
R
D2
DPT with XDP
D1
D2
D1
D2
T
R
D1
T
R
D2
Installation 2-35