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2.3.2 Extension Connection
KX-TD816
Extension jacks 1 through 8 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:
Single Line Telephone
Proprietary Telephone /
Console
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
Single Line telephones
Digital proprietary telephone
(e.g. KX-T7536, KX-T7235)
Analogue proprietary telephone
(e.g. KX-T7030, KX-T7130)
Console
(e.g. KX-T7540, KX-T7240)
General Installation
Diameter of the line
22 AWG
24 AWG
26 AWG
22 AWG
24 AWG
26 AWG
Telephone
1798 m
1128 m
698 m
360 m
229 m
140 m
Wiring
1 pair wire (T, R)
1 pair wire (D1, D2) or
2 pair wire (D1, D2, T, R) for eXtra Device Port
2 pair wire (D1, D2, T, R)
1 pair wire (D1, D2)
Max. length
2.3 Connection
43
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