Multiple Lobby Control Units; Lobby Control Unit Wiring; Figure 10. Many Lobby Control Units To One Line - Mircom TX3 Series Installation And Operation Manual

3.5

Multiple Lobby Control Units

Figure 10 shows a configuration of many Lobby Control Units to one phone line.
The phone can be either a dedicated phone line from the phone company or an
NSL phone line from the NSL Control Unit.
Line1
1 2 3
4 5 6
7 8 9
* 0 # i
Lobby
control
unit 1

Figure 10. Many Lobby Control Units to One Line

3.6

Lobby Control Unit Wiring

All units use the PS-4P transformer for the power supply. All wiring is a
maximum length of 1000 ft. The door strike power supply depends on the door
strike power requirements.
Figure 11 shows a typical wiring arrangement for the Lobby Control Unit.
Telephone Access System Installation and Operation Manual
34 (112)
LT-969 Copyright 2012
Telephone outlet
Central office line
OR
T/R
Line1 Line1
1 2 3 1 2 3
4 5 6 4 5 6
7 8 9 7 8 9
* 0 # i * 0 # i
Lobby Lobby
control control
unit 2 unit 3
NSL
Control
Unit
T/R
Line1
1 2 3
4 5 6
7 8 9
* 0 # i
Lobby
control
unit 4
TX3 System
Line1
1 2 3
4 5 6
7 8 9
* 0 # i
Lobby
control
unit 5
Version 1.6