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Glossary-13980-A2-GB30-20 November 1996
Glossary
Active (Operating) A configuration area containing configuration options currently in use by the modem.
When a power cycle occurs, a reset is performed, or a save is issued using the DCP
, this
area is updated with the contents of Active (Saved).
Active (Saved) A nonvolatile configuration area containing the most recently saved configuration
options. Any changes made to configuration options can be saved using either the DCP’
s
Save command or by issuing an A
T&W0 command.
analog loop See local analog loop.
analog signal
A signal, such as a voice, that varies continuously
.
Answer mode
The modem is in a state where it is ready to receive an incoming call. For example, an
AT
A (Answer) command has been issued to place the modem into online answer mode.
The modem has been forced off-hook and is generating an answer tone, beginning the
handshaking process with the calling modem.
ASCII This code (American Standard Code for Information Interchange) is a 7-bit code which
establishes compatibility between data services. ASCII is the standard for data
transmission over telephone lines. The ASCII code consists of 32 control characters
(nondisplayed) and 96 displayed characters. See Appendix F.
Async Dial
A factory preset configuration area containing the configuration options most often used
in asynchronous dial networks.
asynchronous
transmission
A data transmission that is synchronized by a transmission start bit at the beginning of a
character (five to eight bits) and one or more stop bits at the end.
AT command set A group of commands, issued from an asynchronous DTE, that allow control of the
modem while in Command mode. All commands must begin with the characters A
T and
end with a carriage return.
A
T pr
efix A prefix issued before every AT command (except A/ and +++) which identifies the
DTE’s data rate, parity, and character length.
autobaud
Modem automatically determines the asynchronous DTE data rate when using
AT commands.
automatic answer A capability to respond to a call received over a dial line.