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1820 Telephone Intercom System
Wiring Detail - Dual RJ-71C Option
13
12
Lobby Panel
Doorman Telephone
4
16 Volt, 50 VA UL Listed Transformer.
1
1 2
3
4
Earth Ground.
5
2
Optional Central Office phone line - touch tone, loop start.
3
Doorman / Concierge Telephone (Optional).
4
Lobby panel. Connect additional lobby panels in parallel. Refer to lobby panel installation manual for
5
additional wiring requirements.
Use twisted pair wires for phone connections. 24 AWG up to 800 feet; 22 AWG up to 1600 feet.
6
Decoder board terminals. Used with 1816 systems only.
7
1820-065-B-2-06
8
11
12
8
9
10
11
13
12
13
14
15
16
7
11 12
13
14
15
16
17
18
19
2
6
C.O.
PHN
3
6
INCOMING
C.O. PHN
LINES
14
9
16
Resident
Telephone
without
C.O. Line
10
RJ71C phone block. See drawing M1816-065-6 for detail.
Incoming phone lines from Central Office.
Outgoing phone lines to individual apartments.
DoorKing connecting cable.
RS-485 connecting cable.
To additional Line Interface Boards.
Powered RJ-71C phone block P/N 1820-047 for use only with residents
without active Central Office phone service.
12 VDC Regulated power supply.
Disconnect the resident's line form the phone company. Connect from
powered RJ-71C to resident's terminals.
20
21
22
23 24
16 VAC
PWR
INPUT
1
DOORKING, INC., INGLEWOOD, CA 90301
Title:
1820 Telephone Intercom System
Wiring Detail for Dual RJ-71C Option
Date:
4/05
Dwg. No.
12 VDC
Reg
15
Input
A
M1820-065-9
Rev.
Page 25
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