G
LOSSARY
101
nonvolatile memory (NVRAM)
User-programmable random access memory
whose data is retained when power is turned
off. On the Sportster, it includes four stored
phone numbers and the modem settings.
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 high-speed, error-control
modems 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 modems switch 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.
