US Robotics Sportster Flash x2 User Manual page 43

Non-volatile 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).
On-line Fallback/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.
Protocol
A system of rules and procedures governing communications between
two or more devices. Protocols vary, but communicating devices must
follow the same protocol in order to exchange data. The format of the
data, readiness to receive or send, error detection and error correction
are some of the operations that may be defined in protocols.
RAM
Random Access Memory. Memory that is available for use when the
modem is turned on, but that clears of all information when the power is
turned off. The modem's RAM holds the current operational settings, a
flow control buffer, and a command buffer.
Sportster Flash x2 - User's Guide 39