Mircom TX3 Series - Three Lobby Control Unit Configuration; Figure 18 Dual Lobby Control Units

TX3 System
Version 3.7 Telephone Access System Installation and Operation Manual 41 (119)
LT-969 Copyright January 2017
The Lobby Control Unit senses whether the line in use. If one of the Lobby
Control Units is in use and the user tries to make a call, the other lobby indicates
that the line is in use.
The RS-485 network connection is optional and is only required if the user
decides to connect a PC configurator on one of the panels to configure and/or
monitor both systems.
Figure 18. Dual Lobby Control Units
3.4 Three Lobby Control Unit Configuration
Figure 19 shows a configuration with many Lobby Control Units connected to
many phone lines using combined ADC and NSL connection types. Line 1 and
Line 2 connect to NSL Control Units while Line 3 connects to a dedicated phone
line.
Line1
NSL
Control
Unit
1 2 3
4 5 6
7 8 9

* 0 # i
T/R
Line1
Telephone outlet
Central office line
1 2 3
4 5 6
7 8 9

* 0 # i
1 2 3
4 5 6
7 8 9

* 0 # i
Line1
1 2 3
4 5 6
7 8 9

* 0 # i
Line1
OR
RS-485 bus
(optional)
RS-485 bus
(optional)
Lobby
control
unit 1
Lobby
control
unit 2
Lobby
control
unit 1
Lobby
control
unit 2