US Robotics 005689-03 Manual page 30

Parity 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 the V.42 and the MNP
2-4 protocols. Either the same type of
parity must be used by two communicating
computers or both may omit parity.
Protocol 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 RAM
Random access memory. Memory that is
available for use when the modem is turned
on but that clears 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.
Remote Digital Loopback Remote Digital Loopback
A test that checks the phone link and a
remote modem's transmitter and receiver.
Remote Echo Remote Echo
A copy of the data received by the remote
system, returned to the sending system, and
displayed on the screen. Remote echoing is
a function of the remote system.
ROM ROM
Read Only Memory. Permanent memory,
not user-programmable.
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