Phone Line Polarity - DKS 1812 Classic Installation & Owner's Manual

5.3 Phone Line Polarity

When troubleshooting 1812 operational problems, check
phone line polarity. Crossed polarities can affect system
operation.
Central Office
Telephone
Phone Line Inside Device
Company
Demarcation
Point
Tip
Ring
Tip
Ring
Tip
Ring
Central Office (C.O.)
Demarcation Device
OR
TIP (+): White/blue mark
RING (-): Blue/white mark
RJ11
Phone
Connector
Internet
Main Terminal - Circuit board
connections are shown for clarification
purposes. DO NOT add any additional
jumpers to wiring or terminals.
Main
Terminal
DC Negative 1
2
DC Positive
3
4
DC Positive
5
DC Negative
6
7
8
9
10
11
12
13
14
15
16
17
18
1812-065-V-12-14
Phone Line Surge Suppressor
1877-010
PHONE LINE
INPUT OUTPUT
TIP RING GND GND TIP RING
Cat5e Cat5e Without Surge Board
Phone
Jack
Check that all boards
are properly grounded
with 12 AWG gauge
wire minimum.
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 board and 1812 main terminal.
By-Pass Board
PHONE IN #3 - DC Negative.
PHONE IN #4 - DC Positive.
PHONE OUT #5 - DC Positive.
PHONE OUT #6 - DC Negative.
ENTRY BY-PASS
EARTH
GND
1 2 3 4 5 6 7
CENTRAL PHONE PHONE
HOME
OFFICE IN OUT
Orange Green
Pair Pair
Cat5e
Ground
12 AWG Min.
Ground
12 AWG
Min.
PHONE IN #1 - DC Negative.
PHONE IN #2 - DC Positive.
PHONE OUT #4 - DC Positive.
PHONE OUT #5 - DC Negative.
Terminal
Orange
Pair
Green Pair
1 1 1 1 1
4 4
7 7
1 1 1 1 1
4 4
7 7
ENTRY BY-PASS ENTRY ENTRY BY-PAS
EARTH
GND
1 2 3 4 5
CENTRAL PHONE PHONE
OFFICE IN
SW1
1875-010
8
By-Pass Board - Circuit board
connections are shown for
clarification purposes. DO NOT
add any additional jumpers to
wiring or terminals.
Homeowner's Phones
Older Lines
Red Wire (-)
Cat5e
RING
TIP
Older Lines
Green Wire (+)
Phone
Jack
Main Terminal
Main
1
Phone In
RING
(1-2)
2
TIP
3
GND
4
Phone Out
TIP
5 (4-5)
RING
6
7
8
ON
9
10
MASTER
11
CODE
12
13
14
15
16
1871-010
17
18
When multiple 1812
Push Button Push Button
To Call To Call
5 5 6 6
systems are connected
8 8 9 9
0 0
together, maintain
common polarity on
ALL phone lines.
Push Button Push Button
To Call To Call
5 5 6 6
8 8 9 9
0 0
BY-PAS
SW W SW1
1875-010
6 7 8
HOME
OUT
Phone
Jack
37