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MINIMODEM USB
• RD: Receive Data. The RD LED flashes when the
modem is receiving data from another modem.
• CD: 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.
• OH: 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.
• TR: Terminal Ready. The TR LED lights when
Windows detects and initializes the modem.
• PWR: Power. The PWR led lights when the
system is applying power to the modem.