User`s guide

User’s Guide 43
throughput
The amount of actual user data transmitted per second without the
overhead of protocol information such as start/stop bits or frame
headers and trailers. Compare with characters per second.
V.8
The ITU-T standard specification that covers the initial handshaking
process.
V.17 fax
An ITU-T standard for making facsimile connections at 14,400 bps,
,12,000 bps, 9600 bps, 7200 bps.
V.21
An ITU-T standard for modems operating in asynchronous mode at
speeds up to 300 bps, full-duplex, on public switched telephone
networks.
V.22
An ITU-T standard for modem communications at 1200 bps, compatible
with the Bell 212A standard observed in the U.S. and Canada.
V.22 bis
An ITU-T standard for modem communications at 2400 bps. The
standard includes an automatic link negotiation fallback to 1200 bps
and compatibility with Bell 212A/V.22 modems.
V.27 ter
An ITU-T standard for facsimile operations that specifies modulation at
4800 bps, with fallback to 2400 bps.
V.29
An ITU-T standard for facsimile operations that specifies modulation at
9600 bps, with fallback to 7200 bps.
V.32
An ITU-T standard for modem communications at 9600 bps and 4800
bps. V.32 modems fall back to 4800 bps when line quality is impaired.