For A Proprietary Telephone And A Standard Telephone - Panasonic KX-TD308 Installation Manual

2.3.4 Paralleled Telephone Connection

for a Proprietary Telephone and a Standard Telephone

Method 1: Using a Modular T-Adaptor
Modular T-Adaptor
(Panasonic KX-J66 or USOC RJA2X) B
4-conductor wiring cord
For a digital proprietary telephone:
"D2"
Connect pins "Dl" and
For an analog proprietary
telephone: Connect pins "T", "R",
"D2".
Any standard telephone can be connected in parallel with a
proprietary telephone as follows:
0
only.
Proprietary Telephone
2-conductor wiring cord
Connect pins '7"' and "R".
Standard Telephone
Installation 2-15