Phone Line Polarity - Intertek 1802 Installation & Owner's Manual

5.2 Phone Line Polarity

When troubleshooting Access Plus system 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
Telco
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 jumpers to wiring or
terminals.
1970-010
J1
1
DC Negative
2
DC Positive
3
DC Positive 4
DC Negative 5
6
7
8
9
10
11
12
13
14
15
16
17
18
Main
Terminal
50
Phone
Jack
Check that all boards
are properly grounded
with 12 AWG gauge
wire minimum.
1 1
4 4
7 7
1 1
4 4
7 7
1 1
4 4
7 7
1 1
4 4
7 7
Phone Line Surge Suppressor
1877-010
PHONE LINE
INPUT OUTPUT
TIP RING GND GND TIP RING
Cat5e
Cat5e Without
Surge Board
Ground
12 AWG
Min.
2 2 3 3
CODE
1
9
5 5 6 6
5
Davis T 2
8 8 9 9 Hodges S 4
Miller J 6
Smith K 8
0 0 Thomas W 3
Zimmer R 7 To next Access Plus
System "Phone In
#1 & #2" terminal
when multiple
units are used.
2 2 3 3 CODE
1
9
5 5 6 6
5 Connect up to 5 units
2
4
8 8 9 9
6
8
0 0 3
7
on ONE phone line.
2 2 3 3
1
9
5 5 6 6
Brown L 5
Davis T 2
Hodges S 4
8 8 9 9
Miller J 6
Smith K 8
0 0 Thomas W 3
Zimmer R 7
When multiple units are connected together,
2 2 3 3
1
9
5 5 6 6
5
maintain common polarity on ALL phone lines.
2
4
8 8 9 9
6
8
0 0 3
7
Optional Phone Line Surge Suppressor
DoorKing Surge Suppressor
P/N 1877-010 (or equivalent) is optional but highly
recommended for Telco line.
For best protection, surge suppressor ground wire MUST be
3-ft. or less in length. Use minimum 12 AWG wire. Refer to
instruction sheet included with surge board and section
1.5 for complete information.
Check Polarity of Telephone Line
Check for polarity on the phone "IN" wires, terminals 1 and
2. Terminal 2 must be positive with respect to terminal 1. Set
a VOM meter to measure DC volts. Place the positive lead on
terminal 2 and the negative lead on 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
on terminals 1 and 2.
Main Terminal
PHONE IN #1 - DC Negative.
PHONE IN #2 - DC Positive.
PHONE OUT #4 - DC Positive.
PHONE OUT #5 - DC Negative.
Main
Terminal
J1 J1
1
RING Phone In
(1-2)
2
TIP
3
GND
4
TIP Phone Out
(4-5)
5
RING
6
7
1970-010
8
9
10
11
12
13
14
15
16
17
18
OV
J4
1
2
3
4
5
6
7
8
1810-162-A-6-16