Paradyne 3821PLUS manual Ccitt

COMSPHERE 3821Plus Modem

automatic answer	A capability to respond to a call received over a dial line.
automode	To change modulations or rates within a modulation when modems first connect. A
	modem may automode to a different modulation than what it is configured for due to the
	limitations of the remote modem, or automode to a lower rate due to unfavorable VF line
	conditions during connection.
autorate	To adjust to varying VF line conditions by changing the data rate to a higher or lower
	rate after connection. The lowest rate the modem autorates to is 4800 bps; the highest
	possible rate depends on the modulation the modems connected with. In V.34, the
	modems may autorate asymmetrically.
baud	A unit of signaling speed that is equal to the number of symbols per second. This is not
	necessarily the same as bits per second, although the terms are frequently interchanged.
Bisync	Binary Synchronous Communications. An IBM communications protocol that has
	become an industry standard. It uses a defined set of control characters and control
	character sequences for synchronized transmission of binary-coded data between stations
	in a data communications system.
bit	A contraction of binary digit. A bit, which is the smallest unit of information, represents
	a one or a zero (sometimes called mark or space).
bps	Bits per second. Indicates the speed at which bits are transmitted across a data
	connection.
buffer	A storage device used to compensate for differences in the data flow rate when
	transmitting data from one device to another.
byte	A sequence of successive bits (usually eight) handled as a unit in data transmission.
CCITT	An advisory committee (Consultative Committee on International Telephone and
	Telegraph) established by the United Nations to recommend communications standards
	and policies. Now called ITU-T.
character	A letter, figure, number, punctuation, or other symbols.
character echo	A way to check the accuracy of data transmission by sending (displaying) all the
	characters being transmitted to the monitor.
Class 1 fax	A fax modem standard. Under Class 1 computer software handles most of the protocol,
	compression, and conversion tasks.
Class 2 fax	A fax modem standard. Under Class 2 the modem handles most of the protocol,
	compression, and conversion tasks as well as modulation, leaving the computer free for
	other work.
command line	Contains the command(s) instructing the modem to perform a function. Command lines
	begin with the AT prefix (unless disabled), and are executed when you press the Return
	key.
Command mode	One of two general modem operating modes. When in Command mode, the modem
	accepts commands instead of transmitting or receiving data.

Glossary-2 January 1999 3821-A2-GB20-40