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Initial Power Up
Upon initial power up, the front panel LEDs blink simultaneously. They blink once for
multimode or twice for singlemode. Afterwards, the LEDs return to their normal signal
presence indication.
If a different fiber optic SFP module or no SFP module is connected, the LEDs first blink
once or twice to identify the device, but then blink continuously.
Selecting an Input
To select an input from the front panel, perform the following actions:
1. Press the input selection button that corresponds with the desired rear panel input
connector.
2. The corresponding LED lights to indicate the active input.
Enabling or Disabling Front Panel Lockout Mode (Executive Mode)
Push and hold (for about 5 seconds) inputs 1, 2, and 3 simultaneously until the front
panel LEDs blink three times to enable or disable front panel configuration. In executive
mode, contact closure and RS-232 control are still available. By default, executive mode is
disabled.
Enabling Auto Switch Mode
Press and hold (for about 3 seconds) inputs 1 and 3 simultaneously until the front panel
Auto Switch LED lights. This prioritizes the highest numbered active input.
NOTE: Setting audio switch mode to prioritize the lowest numbered active input can be
done only with SIS commands (see Auto switch mode SIS commands on page 15).
Normal switch mode is the default mode.
Enabling Normal Switch Mode
Press and hold (for about 3 seconds) inputs 1 and 2 simultaneously until the front panel
Auto Switch LED turns off. This is the default mode.
FOX T USW 103 Universal Switcher • Operation 11