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2.3.8 Polarity Sensitive Telephone Connection
2-16 Installation
If the telephone is polarity sensitive, follow the procedure below:
1
2
3
4
5
6
7
8
9
0
Outside (CO) Line
Reverse here
Extension
1
2
3
4
5
6
7
8
9
0
Outside (CO) Line
Reverse here
Extension
1. Complete all the required extension
wiring.
2. Confirm that dialing can be done from all
the extensions using a touch-tone
telephone.
If dialing fails, the polarity between the
extension and the system must be reversed.
3. Reverse as shown.
4. Unplug the system.
5. Connect all outside (CO) lines.
6. Confirm that dialing can be done on the
following extension using a touch-tone
telephone.
Extension (T, R) of jack 01: Outside
(CO) line 1
If dialing fails, the polarity between the
system and the outside (CO) line must be
reversed.
7. Reverse as shown.
8. Every time an extension telephone is
replaced, repeat the procedure above.