Chapter 3 – Operation
Chapter 3 – Operation
About the Front Panel
The LED indicators on the front panel indicate status, configuration, and activity:
TD – Transmit Data. Flashes when the modem is transmitting data to another modem. RD – Receive Data. Flashes when the modem is receiving data.
CD – Carrier Detect. 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.
56 – 56K Mode
33 – V.34 Mode
14 – V.32bis Mode
OH –
TR – Terminal Ready. Lights when a communications program is using the modem. It means the modem is ready for an outgoing or incoming call. It goes off when the communications program disconnects the serial port. When it goes off, a connected modem will also disconnect.
EC – Error Correction (V.42). Lights continuously when the modem is in V.42 error correction mode, and flashes when compression is activated.
FX – Fax. Lights when the modem is in fax mode.
Note: When you turn on the modem, the protocol indicators flash briefly as the modem does a
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