2-10 Installation
2.8 Extension Connection
Extension ports 01 through 08 can be used for all kinds of telephones.
Telephone Wiring
The maximum length of the extension line cord (twisted cable) which connects the system
and the extension is as follows.
2 or 4-conductor wiring is required for each extension as listed below. There are 4 pins
possible for connection: “T” (Tip), “R” (Ring), “L” (Low) and “H” (High).
• 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.
• Extension ports are at TNV.
Telephone
Single line telephones
Proprietary telephone
(e.g., KX-T7130)
Wiring
1 pair wire (A,B)
2 pair wire (L, H, A, B)
!
!
ø 0.5 mm (26 AWG); Under 140 m
ø 0.6 mm (24 AWG); Under 229 m
ø 0.8 mm (22 AWG); Under 360 m
(Extension Loop Limit: 40 Ω)
ø 0.5 mm (26 AWG); Under 698 m
ø 0.6 mm (24 AWG); Under 1128 m
ø 0.8 mm (22 AWG); Under 1798 m
(Extension Loop Limit: 600 Ω including set)
ø 0.5 mm (26 AWG); Under 140 m
ø 0.6 mm (24 AWG); Under 229 m
ø 0.8 mm (22 AWG); Under 360 m
(Extension Loop Limit: 40 Ω)
Proprietary Telephone
Single Line Telephone
DSS Console
(KX-T7040)
PSQX1708ZA-03E.QX 99.10.15 5:46 PM Page 10
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