Mircom TX3 Series Installation And Operation Manual page 39

4.1.1 Connectors
USB. Computer connection for firmware download and configuration.
P4. TX3-MDM Modem Board connector.
P6. Key pad and front door LCD display.
P7. Guard Phone Board connector.
4.1.2 Potentiometer
PT1. Pulse phone potentiometer. This potentiometer is normally factory set and
does not require adjustment.
4.1.3 Switches
SW1. SW1 sets the unit's ID (node address).
SW2. SW2 turns the unit's power ON and OFF for servicing, or to re-start the
unit.
4.1.4 Jumpers
JW1. JW1 is used for updating firmware and is normally open.
JW2. JW2 is used for updating firmware and is normally open.
JW3. JW3 is not used and is left open.
JW4. JW4 is not used and is left open.
JW5. JW5 is not used and is left open.
JW6. JW6 is left closed.
JW7. JW7 is not used and is left open.
JW8. JW8 defines the operating state of the door strike relay as normally open or
Version 1.6 Telephone Access System Installation and Operation Manual
LT-969 Copyright 2012
normally closed. A jumper wire connects to either the normally open
(position 2 - top) or normally closed pin (position 1 - bottom).
Lobby Control Unit Setup
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