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Glossary
Glossary-73830-A2-GB91-30 August 1998
Hz A unit of frequency (hertz) that equals one cycle
per second.
ITU-T The Telecommunications Standardization Sector
of the International Telecommunications Union,
an advisory committee established by the United
Nations to recommend communications standards
and policies. Before March 1993 it was called
CCITT.
ITU-T V.17 A fax communications standard for modems
operating half-duplex with synchronous data at
14,400 bps.
ITU-T V.22 A standard for modems operation full-duplex with
asynchronous or synchronous data at
1200 bps over the dial network (PSTN).
ITU-T V.22 bis A standard for modems operating full-duplex with
asynchronous or synchronous data at
1200 or 2400 bps over the dial network (PSTN).
ITU-T V.25 bis A dialing protocol that permits direct and
stored-number dialing in asynchronous,
bisynchronous, or HDLC modes.
ITU-T V.27 ter A fax communications standard for modems
operating half-duplex with synchronous data at
2400 and 4800 bps.
ITU-T V.29 A fax communications standard for modems
operating half-duplex with synchronous data at
7200 and 9600 bps.
ITU-T V.32 A standard for modems operating full-duplex with
asynchronous or synchronous data at
4800 or 9600 bps on switched (dial) or leased
telephone lines.
ITU-T V.32 bis A standard for modems operating full-duplex with
asynchronous or synchronous data over dial
networks (PSTN) or leased lines at 14,400,
12,000, 9600, 7200, or 4800 bps.