Panasonic KX-TG2200B Operating Instructions Manual page 8

I Connecting the telephone line cords to four single-line telephone
jacks
For this connection, please purchase two Panasonic T-adaptors and two
2-wired telephone line cords.
2-Wired Telephone
Line Cords
4-Wired Telephone
Line Cords
2-Wired Telephone
Line Cords
–8–
Single-Line
Telephone
Jacks (RJ11C)
T-Adaptor
T-Adaptor
LINE 1
LINE 2
LINE 3
LINE 4