Phone Line Polarity - DKS 1812 Owner's Manual

5.2

Phone Line Polarity

Red
Green
Home
Home
Phone Out
Bypass
Phone Out
Switch
Phone In
Phone In
C.O. (Phone Company)
C.O. (Phone Company)
Surge
Suppresser
Central Office (C.O.)
Demarcation Device
Page 54
8 DC Positive
7 DC Negative
6 DC Negative
5 DC Positive
4 DC Positive
3 DC Negative
2 DC Positive
1 DC Negative
Blue/White
Ring
White/Blue
Tip
Gnd
Gnd
Ring
Tip
White/Blue
Blue/White
Earth
Ground
When troubleshooting 1812 operational problems,
check phone line polarity. Crossed polarities can
affect system operation.
Dashed lines
connections and are shown for clarification purposes
only. DO NOT add any additional jumpers to wiring
or terminals.
When connecting multiple 1812 systems, maintain
common polarity on all connections.
Check polarity on terminals.
Example: set a VOM meter to measure DC volts.
Place the positive lead on 1812 terminal 2 and the
negative lead on 1812 terminal 1. If the meter shows
a positive voltage - OK. If the meter shows a negative
voltage (needle moves off scale to the left), reverse
the wires. Repeat this process to check other wire
pairs on bypass switch and 1812 terminal strip.
DC Negative
DC Positive
DC Positive
DC Negative
Wiring if surge
suppresser is
not used.
are existing circuit board
1812
Terminal
1 Phone In
2 Phone In
3 Ground
4 Phone Out
5 Phone Out
1812-162-B-6-09