US Robotics Sportster Operating Instructions Manual page 90

The "Link Diagnostics" screen displays
statistics about your last connection. This
screen is most often used as an aid in
diagnosing connection failures, but it also can
provide information about connection speeds
and phone line conditions.
Modulation displays the speed and type of
connection.
Carrier Frequency displays the electrical
frequency of the carrier signal.
Symbol Rate displays the speed of the
transmission.
Trellis Code, Nonlinear Encoding,
Shaping, and Precoding all refer to
methods of handling high speed data
transmission.
The items followed by (dB), (-dB), (-dBm),
and (msec) refer to variations in the
modulation tones that actually carry the
information.
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SING ODEM TATION
The rest of the screen contains information
about CRC errors, Block Errors (Blers),
resent data, and other data. This information is
very important if you experience problems
transmitting or receiving data or if you suspect
problems with your phone service.
Only our U.S. Robotics Winmodems use
VxDs, or Virtual Device Drivers. The
Winmodem uses special software (called a
'driver') to manage many of the functions
handled by hardware in our other modems. If
you are using a Winmodem, the Extended
Information menu will offer you the option of
clicking on VxD to view information on the
Winmodem driver. Please refer to your
Winmodem manual for detailed information on
the Winmodem drivers.
Courier users will see a display of current
Dialback/Security settings. Refer to your