Panasonic KX-TG4131MEB Service Manual page 53

12.2.2. Connections (Handset)
Connect the DC Power or Battery to BATT+ and BATT-.
Connect the JIG cable GND (black) to GND.
Connect the JIG cable UTX (yellow) to UTX and URX (red) to URX.
DC Power
1
or Battery
Note:
*: COM port names may vary depending on what your PC calls it.
URX
BATT+
Handset P. C. board
KX-TG4131MEB/KX-TG4132MEB/KX-TG4133MEB/KX-TGA410MEB
URX (red)
3
3 UTX (yellow)
UTX
GND (black)
2
GND
BATT-
JIG Cable
53
To Serial Port
(com port 1*)
PC