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2.5 Connecting Extensions
60 Installation Manual
2- or 4-conductor wiring is required for each extension as listed below. There are 4 pins that can be
used for connection: "T" (Tip), "R" (Ring), "H" (High) and "L" (Low).
Note
If a telephone or answering machine with an A-A1 relay is connected to the PBX, set the A-A1
relay switch on the telephone or answering machine to the "OFF" position.
Telephone Wiring
SLT 1-pair wire (T, R)
PT (such as KX-T7735) 2-pair wire (T, R, H, L)
DSS Console 1-pair wire (H, L)