Interlogix Alliance AL-4017, Installation Manual

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5
LEDs
Figure 4
on page 4 shows the following LEDs located on the board:
L1.
Flashes slowly when the panel is operating (the microprocessor is running).
RX (Comms).
Yellow LED flashes when remote units (RAS and DGP devices) are replying to polling.
TX (Comms).
Red LED flashes when the panel is polling remote units. It must always be active.
RX1 (Modem).
Yellow LED flashes when data is being received from a device connected to the PSTN
dialer line (J15, J16) or J18 serial port RS232 communication to PC.
TX1 (Modem).
Red LED flashes when data is being sent from the panel to a device connected to the
PSTN dialer line (J15, J16) or J18 serial port RS232 communication to PC.