2.3.4 Extension Connection
Extension jacks 01 – 08 are for single line telephones and analog
proprietary telephones.
Telephone Wiring
The maximum length of the extension line cord (twisted cable)
which connects the system and the extension is as follows.
Diameter
of the line Max. length
Single Line Telephone 22 AWG 1798 m {5900 feet}
(Station Loop Limit: 24 AWG 1128 m {3700 feet}
600 Ω including set) 26 AWG 698 m {2290 feet}
Proprietary Telephone 22 AWG 360 m {1180 feet}
(Station Loop Limit: 24 AWG 229 m {750 feet}
40 Ω) 26 AWG 140 m {460 feet}
2 or 4-conductor wiring is required for each extension as listed
below. There are four pins possible for connection: “T” (Tip),
“R” (Ring), “L” (Low) and “H” (High).
Note • If a telephone or answering machine with an A-A1 relay is connected to
the system, set the A-A1 relay switch on the telephone or answering
machine to the OFF position.
Connection
Insert the modular plugs of the telephone line cords (2 or 4-
conductor wiring) into the modular jacks on the system.
1 pair wire (T, R)
2 pair wire (L, H, T, R)
WiringTelephone
Single line telephone
Proprietary telephone
(e.g., KX-TA30830)
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