G
LOSSARY
100
LAPM
Link Access Procedure for Modems. An
error-control protocol defined in ITU-T
Recommendation V.42. Like the MNP
protocols, LAPM uses cyclic redundancy
checking (CRC) and retransmission of
corrupted data (ARQ) to ensure data
reliability.
local echo
A modem feature that enables the modem to
display keyboard commands and transmitted
data on the screen. See command Hn.
MNP
Microcom Networking Protocol, an error-
control protocol developed by Microcom,
Inc., and now in the public domain. There are
several different MNP protocols, but the most
commonly used one ensures error-free
transmission through error detection (CRC)
and retransmission of erred frames.
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.