Instruction manual

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4. DOOR MONITOR
4.1 Overview
This section will describe the installation of the 2743 to work with an external Door Intercom
and Magnetic Door Strike. This assumes that you have a working 4-Line system. For
information about the basic installation of the Cortelco 4-Line system, see the 2740 or 2750
manual.
4.2 Wiring
Connect the 2743 jack labeled L1/L2 TO WALL to telephone Line 1. It is only necessary to
connect to Line 1. The unit may also be connected to a two line RJ14 jack wired to Lines 1 and
2. It is not necessary to connect to Lines 3 and 4.
4.3 DIP Switch
4.3.1 Door Monitor Selection
Set Switch 7 DOWN and Switch 8 UP to select Door Monitor operation.
4.3.2 Door Strike Timing (Optional)
Set Switches 5 and 6 to control how many seconds the magnetic door strike will remain unlocked
when activated from a phone. The choices are 2 seconds, 5 seconds, 10 seconds and 15 seconds.
2 Seconds 5 Seconds 10 Seconds 15 Seconds
4.3.3 Station Number
You must assign a station number to your 2743. Up to 4 Door Intercom Adapters may be
installed. You may choose Station Numbers 13, 14, 15 or 16. This must be a number which is
not currently in use by another phone in the system. Use Switches 1 – 4 to set the station
number. Refer to the table below to set the DIP Switches for the desired station number.