Panasonic KX-TA616, Installation Manual, Page: 25 / 246

Installation 2-9
2.8 Extension Connection
Extension jacks 01 through 08 for the KX-TA308 and extension jacks 01 through 16 for the
KX-TA616 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.
Diameter of the line Max. length
Single Line Telephone 22AWG 1798m
(Station Loop Limit:
24AWG 1128m
600 ohms including set)
26AWG 698m
Proprietary Telephone 22AWG 360m
(Station Loop Limit:
24AWG 229m
40 ohms)
26AWG 140m
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.
Connection
Insert the modular plugs of the telephone line cords (2 or 4-conductor wiring) into the modular
jacks on the system.
Telephone
Single line telephones
Proprietary telephone
(e.g., KX-T7330)
Wiring
1 pair wire (T, R)
2 pair wire (L, H, T, R)
To extensions
(JACK 01–08 for the KX-TA308,
JACK 01–16 for the KX-TA616)
T H R L
H: High
T: Tip
R: Ring
L: Low
View of TEL Jack (Extension)
* The illustration on this page is a KX-TA308.
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