Avaya 6211 Manuel D’Utilisation
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GLOSSARY
ANSI display protocol. A standard set of escape sequences, established by ANSI (the American
National Standards Institute), used by many display terminal devices to transmit or receive
display control functions, such as cursor movement and color or graphics configuration
parameters.
National Standards Institute), used by many display terminal devices to transmit or receive
display control functions, such as cursor movement and color or graphics configuration
parameters.
Asynchronous data communications. A method of communicating data in which each
‘‘character’’ (a 7 or 8 bit data word) is sent or received separately at a selectable data transfer
rate, and is framed by extra bits preceding and following the character. Various error-checking
methods use the total bit-count to determine whether the character received at one end of the data
path is the same as the one sent at the other end. Also called asynchronous mode, this method, as
opposed to synchronous mode, does not use a clock signal to meter data. (Since the 7400B Data
Module operates only in asynchronous mode, synchronous mode is not defined in this glossary.)
See also data options.
‘‘character’’ (a 7 or 8 bit data word) is sent or received separately at a selectable data transfer
rate, and is framed by extra bits preceding and following the character. Various error-checking
methods use the total bit-count to determine whether the character received at one end of the data
path is the same as the one sent at the other end. Also called asynchronous mode, this method, as
opposed to synchronous mode, does not use a clock signal to meter data. (Since the 7400B Data
Module operates only in asynchronous mode, synchronous mode is not defined in this glossary.)
See also data options.
AT command set. A de facto industry-standard set of commands used for configuration and
operation of DCE devices or modems. The AT (Attention) command set originated with Hayes
Microcomputer Products, Inc. The AT&T 7400B Data Module uses a subset of the full AT
command set.
operation of DCE devices or modems. The AT (Attention) command set originated with Hayes
Microcomputer Products, Inc. The AT&T 7400B Data Module uses a subset of the full AT
command set.
Command files. Files created for or by data communications software running on a PC that can
be used to execute a sequence of commands to complete a task, such as performing an automatic
log in to a specific remote device. Also called script files.
be used to execute a sequence of commands to complete a task, such as performing an automatic
log in to a specific remote device. Also called script files.
Command line. A string of one or more valid and compatible AT commands typed on one line
with any applicable arguments. Most command lines begin with the AT prefix and end with a
carriage return (issued by pressing
with any applicable arguments. Most command lines begin with the AT prefix and end with a
carriage return (issued by pressing
Enter
).
Command mode. An operating mode in which the 7400B Data Module looks at all characters
coming from its associated terminal device and attempts to interpret them as commands. See
also on-line mode.
coming from its associated terminal device and attempts to interpret them as commands. See
also on-line mode.
Communications parameters. See data options.
Configuration profiles. See option profiles.
Data Communications Equipment. (DCE, also Data Circuit-terminating Equipment) The
equipment that provides the functions required to establish, maintain and terminate a data
communications connection. The DCE also provides any required signal conversion for
communication between the data terminal equipment (DTE) and the telephone line or data
circuit.
equipment that provides the functions required to establish, maintain and terminate a data
communications connection. The DCE also provides any required signal conversion for
communication between the data terminal equipment (DTE) and the telephone line or data
circuit.
Data metering. A selectable feature of the 7400B Data Module that allows the device and its
associated terminal to operate at a higher speed than the remote system to which it is connected.
associated terminal to operate at a higher speed than the remote system to which it is connected.
Data mode. See on-line mode.
Data options. For asynchronous data communications, these parameters include data transfer
speed (expressed in bits/second or bps, and sometimes called baud rate), parity, data word size
(or data bits), and stop bits. Generally, these parameters must be set to match at both ends of the
communication line. Except when the data metering option is enabled, the 7400B data module
speed (expressed in bits/second or bps, and sometimes called baud rate), parity, data word size
(or data bits), and stop bits. Generally, these parameters must be set to match at both ends of the
communication line. Except when the data metering option is enabled, the 7400B data module
GLOSSARY
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