US Robotics 56K Series Manual page 55

off/on hook
Modem operations that are the
equivalent of manually lifting a phone
receiver (taking it off-hook) and
replacing it (going on-hook).
online fall back/fall forward
A feature that allows a high-speed,
error-control modem to monitor line
quality and fall back to the next lower
speed in a defined range if line quality
diminishes. As line conditions improve,
the modem switches up to the next
higher speed.
originate mode
The mode used by your modem when
initiating an outgoing call to a
destination modem. The transmit/receive
frequencies are the reverse of the called
modem, which is in answer mode.
parity
A simple error-detection method that
checks the validity of a transmitted
character. Character checking has been
surpassed by more reliable and efficient
forms of error checking, including V.42
and MNP 2-4 protocols. Either the
same type of parity must be used by
two communicating computers, or both
may omit parity.
protocol
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