Black Box MD403A user manual Front Panel, Front panel

PORTABLE USB MODEM

2.7 Front Panel

The Portable USB Modem has four LEDs on the front panel indicating status, configuration, and activity.

Figure 2-2. Front panel.

•Data. The Data LED flashes when the modem is transmitting/receiving data to/from another modem.

•Carrier Detect. The CD LED lights when the modem detects a valid carrier signal from another modem. It is on when the modem is communicating with the other modem and off when the link is broken.

•Off-Hook. The OH LED lights when the modem is off-hook, which occurs when the modem is dialing, online, or answering a call. The LED flashes when the modem pulse-dials.

•Terminal Ready. The TR LED lights when Windows detects and initializes the modem.

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