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

2.3.5 Extra Device Port (XDP) Connection

for a Digital Proprietary Telephone and a Standard Telephone

Method 1
4-conductor wiring cord
Connect pins "Di" and
( "'I"' and "R" are for a standard
telephone.)
Digital Proprietary
Telephone
Method 2
Programming References
Feature References
A digital proprietary telephone (XX-T7220, KX-T7230, XX-
T7235, or XX-T7250) and a standard telephone can be connected
to the same extension jack yet have different extension numbers
this jack.
"D2" only.
I
Section 2.3.4 "Paralleled Telephone Connection, Method 2: for
Digital Proprietary Telephone only" is also available for XDP
connection.
Section 4, System Programming
Section 3, Features
2-conductor wiring cord
Standard Telephone
Installation 2-17