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DOORKING, INC., INGLEWOOD, CA 90301
Date: Dwg. No.
1820 Telephone Intercom System
Wiring Detail for Powered RJ-71C / Dual Boards
Rev.
Title:
4/05
A
M1820-065-8
17 21151413 20191811 12 16 23 2422
1820 Telephone Intercom System
Wiring Detail - Powered RJ-71C / Dual Interface Boards
C.O.
PHN
16 VAC
PWR
INPUT
INCOMING
C.O. PHN
LINES
7
8
3
Resident
Telephone
w/ Active
C.O. Line
1
2
5
Lobby Panel
9
431 2
2
Earth Ground.
3
Optional Central Office phone line - touch tone, loop start.
4
Doorman / Concierge Telephone (Optional).
5
Lobby panel. Connect additional lobby panels in parallel. Refer to lobby panel installation manual for
additional wiring requirements.
6
Use twisted pair wires for phone connections. 24 AWG up to 800 feet; 22 AWG up to 1600 feet.
7
8
RJ71C phone block. See drawing M1816-065-6 for detail.
9
Incoming phone lines from Central Office.
10
Outgoing phone lines to individual apartments.
11
DoorKing connecting cable.
12
RS-485 connecting cable.
13
To additional Line Interface Boards.
Decoder board terminals. Used with 1816 systems only.
13
12
12
13
11
10
11
12 VDC
Reg
Input
14
14
Powered RJ-71C phone block P/N 1820-047 for use only with residents
without active Central Office phone service.
15
15
12 VDC Regulated power supply.
Resident
Telephone
without
C.O. Line
Doorman Telephone
4
6
6
16 Volt, 50 VA UL Listed Transformer.
1
Page 24 1820-065-B-2-06