Panasonic KX-TD308 Installation Manual page 48

2.3.4 Telephone Connection
EXtra Device Port (XDP) Connection
Method 1
4-conductor wiring cord
Connect pins "D " and "D
1
( "T" and "R" are for a standard
telephone.)
Digital Proprietary
Telephone
Method 2
Programming References
Feature References
A digital proprietary telephone and a standard telephone can be
connected to the same extension jack yet have different extension
numbers (eXtra Device Port feature). System Programming is
required for this jack.
" only.
2
POWER
Section 2.3.4 "Telephone Connection, Paralleled Telephone
Connection, Method 2: for Digital Proprietary Telephone only" is
also available for XDP connection.
Section 4, System Programming
[600] EXtra Device Port
Section 3, Features
EXtra Device Port (XDP)
2-conductor wiring cord
Connect pins "T" and "R".
Standard Telephone
Installation 2-19