0049-1800-xxx 326X V.34, V.34-SDC and V.32bis Series Modem – USER’S GUIDE 02/23/2010
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EIA/TIA 232-D
The most commonly used computer/modem interface. An electrical standard for
interconnecting data communications equipment (DCE) and data terminal
equipment (DTE) established by EIA. (The pinout is the same as for EIA 232-C
and is nearly equivalent to ITU V.24.)
EOT
End-of-transmission control character in character-oriented protocols (applied to
BISYNC). Tells the receiver that all user data (text) has been sent.
ETX
End-of-text control character. Tells the receiver that the end of a message has
been reached.
Exclusion key
Allows calls to be answered manually and transferred to the modem using an
telephone
integral exclusion key.
Fallback
Switching the data system to a lower transmission speed either for reducing traffic
during off-peak hours or because of distortion in the telephone system.
Fall forward
Switching from a lower to a higher data rate.
Flow control
Controls data transfer between endpoints in a data network; line signals or flow
control characters stop and start the flow of data.
Four-wire
A circuit containing two pairs of wires, one pair for each transmission direction.
Full-duplex
A signaling circuit that allows simultaneous 2-way transmission and reception.
Frame
A group of bits transmitted serially over a communications channel. The basic
data transmission unit used with bit-oriented protocols.
Gain
The amount by which an amplifier (or power) increases the amplitude of a signal
passing through it; often represented in dB.
Half-duplex
A circuit that allows alternating transmit and receive signals, but not both
simultaneously.
HDLC
High-level data link control. ITU-specified, bit-oriented, data-link control
protocol; any related control of data links by specified series of bits rather than by
control characters.
Hexadecimal
Base 16 number system with digits ranging from 0 to F.
ITU. See CCITT
International Telecommunications Union. Formerly CCITT.
ITU-T
Telecommunication Standardization Sector of ITU.
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