50 (119) Telephone Access System Installation and Operation Manual Version 3.7
LT-969 Copyright January 2017
Lobby Control Unit Setup
4.1.1 Connectors
USB. Computer connection for firmware download and configuration.
P4. Modem Module connector.
P5. IP Module connector.
P6. Key pad and front door LCD display.
P7. Guard Phone Board connector.
4.1.2 Potentiometer
PT1 (if present). Pulse phone potentiometer. This potentiometer is normally
factory set and does not require adjustment.
4.1.3 Switches
SW1. SW1 sets the unit’s RS-485 ID (node address) and the IP addressing mode.
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 on for a Touch Screen unit, and off otherwise.
JW8. JW8 defines the operating state of the door strike relay as normally open or
normally closed. A jumper wire connects to either the normally open
(position 2 - top) or normally closed pin (position 1 - bottom).
JW11:
• If the panel has the MC-009 microphone, close JW11.
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