G
LOSSARY
97
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
.
remote digital loopback
A test that checks the phone link and a remote
modem's transmitter and receiver.
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.
