Modem Controls and Indicators
The front of the modem contains the power switch and modem indicator lights. These are shown in the drawing below:
Figure 2: Modem Indicators and Controls
The power switch is a
The LED (light emitting diode) indicators report modem status. They are:
CS (Clear to Send) | On when CTS signal is active |
RS (Request to Send) | On when RTS signal is active |
CD (Carrier Detect) | On when remote carrier has been detected |
OH (Off Hook) | On when the modem is off hook |
RD (Receive Data) | On when the modem is receiving data |
SD (Transmit Data) | On when the modem is sending data |
TR (Terminal Ready) | On when DTR signal is active |
MR (Modem Ready) | On when power is applied to the modem |
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