TX3 System
Version 5.4 TX3 Telephone Access System Installation and Operation Manual 39
LT-969 Copyright 2019
All units use the PS-4P transformer for the power supply. The door strike power
supply depends on the door strike power requirements.
3.2 Single Lobby Control Unit
Figure 17 shows the simplest configuration.
Figure 17. Single Lobby Control Unit
Line1
NSL
Control
Unit
1 2 3
4 5 6
7 8 9
* 0 # i
T/R
1 2 3
4 5 6
7 8 9
* 0 # i
Line1
Telephone outlet
Central office line
OR