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Glossary
Command mode
One of two modem operating modes. When in Command mode,
the modem accepts commands instead of transmitting or
receiving data. See also Data mode .
COM port
Communications port. A computer's serial communications port
used to transmit to and receive data from a modem. The
modem connects directly to this port.
communications software
Software installed on a computer that controls the modem.
configuration option
Modem software that sets specific operating parameters for the
modem. Sometimes referred to as straps.
CTS
Clear-to-Send. A signal sent to the computer indicating that the
modem is ready for the computer to transmit data.
D
data compression
The elimination of empty fields, redundancies, and gaps in order
to reduce storage capacity needs and the amount of data to be
transmitted. Anything that is eliminated is restored after the data
is received.
Data mode
One of two operating modes. When in Data mode, the modem
considers any input from the computer to be data and transmits
it across the telephone line to the remote modem. See also
Command mode.
Issue 1 November 1994
GL-3
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