3Com 005605-00 Manual page 100

modem
A device that transmits/receives computer data
through a communications channel such as
radio or telephone lines. It also changes signals
received from the phone line back to digital
signals before passing them to the receiving
computer.
nonvolatile memory (NVRAM)
User-programmable random access memory
whose data is retained when power is turned
off. On the U.S. Robotics modem, 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).
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G
LOSSARY
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.