US Robotics 005689-03 Manual page 31

Serial Transmission Serial Transmission
The consecutive flow of data in a single
channel. Compare to parallel transmissions
where data flows simultaneously in multiple
channels.
Start/Stop Bits Start/Stop Bits
The signaling bits attached to a character
before the character is transmitted during
asynchronous transmission.
Terminal Terminal
A device whose keyboard and display are
used for sending and receiving data over a
communications link. Differs from a
microcomputer or a mainframe in that it has
little or no internal processing capabilities.
Terminal Mode Terminal Mode
Software mode that allows direct
communication with the modem. Also
known as command mode.
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Throughput Throughput
The amount of actual user data transmitted
per second without the overhead of
protocol information such as Start and Stop
bits or frame headers and trailers. Compare
with characters per second.
V.8 V.8
The portion of the V.34 specification that
covers the handshaking process.
V.17 Fax V.17 Fax
A ITU-T standard for making facsimile
connections at 14,400 bps, 12,000 bps,
9,600 bps, and 7,200 bps.
V.21 V.21
A ITU-T standard for modems operating in
asynchronous mode at 300 bps, full-duplex,
on public switched telephone networks.