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2.3 Connection
General Installation
45
2.3.2 Extension Connection
KX-TD816
Extension jacks 01 through 08 are for all kinds of telephones.
Maximum Cabling Distance
The maximum length of the extension line cord (twisted cable) which connects the system and
the extension is as follows:
Telephone Wiring
2 or 4-conductor wiring is required for each extension as listed below. There are four pins for
possible connection: "T", "R", "D1" and "D2".
T: Tip
R: Ring
D1: Data 1
D2: Data 2
Diameter of the line Max. length
Single Line Telephone 22 AWG
24 AWG
26 AWG
1798 m
1128 m
698 m
Proprietary Telephone /
Console
22 AWG
24 AWG
26 AWG
360 m
229 m
140 m
Telephone Wiring
Single Line telephone 1 pair wire (T, R)
Digital proprietary telephone
(e.g. KX-T7536, KX-T7235)
1 pair wire (D1, D2) or
2 pair wire (D1, D2, T, R) for eXtra Device Port
Analogue proprietary telephone
(e.g. KX-T7030, KX-T7130)
2 pair wire (D1, D2, T, R)
Console
(e.g. KX-T7540, KX-T7240)
1 pair wire (D1, D2)