Mircom TX3 Series - Multiple Lobby Control Units; Figure 20 Many Lobby Control Units to One Line

TX3 System
Version 3.7 Telephone Access System Installation and Operation Manual 43 (119)
LT-969 Copyright January 2017
3.5 Multiple Lobby Control Units
Figure 20 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.
Figure 20. Many Lobby Control Units to One Line
1 2 3
4 5 6
7 8 9

* 0 # i
1 2 3
4 5 6
7 8 9

* 0 # i
1 2 3
4 5 6
7 8 9

* 0 # i
1 2 3
4 5 6
7 8 9

* 0 # i
1 2 3
4 5 6
7 8 9

* 0 # i
NSL
Control
Unit
OR
Line1 Line1 Line1 Line1 Line1
Telephone outlet
Central office line
T/R
T/R
Lobby
control
unit 1
Lobby
control
unit 2
Lobby
control
unit 3
Lobby
control
unit 4
Lobby
control
unit 5