3Com 005605-00 Manual page 98

fax mode
The mode used by a modem to send and
receive data in facsimile format. See
definitions for V.17, V.27ter, V.29.
flow control
A mechanism that compensates for differences
in the flow of data into and out of a modem or
other device. See commands &Hn, &In, &Rn.
frame
A data communications term for a block of
data with header and trailer information
attached. The added information usually
includes a frame number, block size data,
error-check codes, and Start/End indicators.
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LOSSARY
full duplex
Signals can flow in both directions at the same
time over one line. In microcomputer
communications, may refer to the suppression
of the online local echo.
half duplex
Signals can flow in both directions, but only
one way at a time. In microcomputer
communications, may refer to activation of the
online local echo, which causes the modem to
send a copy of the transmitted data to the
screen of the sending computer.
Hz
Hertz, a frequency measurement unit used
internationally to indicate cycles per second.