Boca HOME OFFICE, Руководство пользователя

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68
H
OME
/O
FFICE
M
ODEM
retrain . An adjustment process performed when one of the modems
detects signal distortion or line noise which threaten data integrity.
RTS/CTS . Request to Send/Clear to Send. RTS and CTS are two
control signal lines between the modem (DCE) and terminal (DTE)
which allow the terminal to control the flow of information. See also
flow control.
S
sleep inactivity timer
. Determines the length of time the modem
operates in normal mode with no activity before entering low-power
“sleep” mode.
split-speed direction . Determines which direction (transmit or
receive) has the 75bps channel and which has the 1200bps channel,
but is only active if the \W command is set to 1. Used with V.23
modulation only.
standard AT-command . The basic AT command set, originated by
Hayes Microcomputer Products, Inc.
synchronous clock source . Applies to synchronous modem
operations and is set with the &X command. The command specifies
the clocking source referred to as the transmit signal element timing.
This can be controlled by either the modem or the terminal.
synchronous communication s. A method of transmission in which
data bits are sent continuously at the same rate under the control of a
fixed frequency clock signal.
T
touch-tone dialing
. Push-button tone dialing as used on
contemporary phone sets. The dial modifier ATT sets the modem to
“tone” mode. Tone dialing is faster and more reliable than older-style
pulse dialing.
X
XON/XOFF
. XON and XOFF are the names of two different control
characters. See also flow control.
Acknowledgements
The Complete Modem Reference. Gilbert Held. John Wiley & Sons, Inc.
Upgrading and Repairing PCs. (Second Edition). Que Corporation.
HOMEOFF.PM6 5/9/97, 9:15 AM 68