USRobotics V.34 - Manual (Page 218)

COURIER HIGH SPEED MODEMS
Glossary J-9
Local Echo
A modem feature that enables the modem to send copies of key-
board commands and transmitted data to the screen. When the
modem is in Command mode (not online to another system) the
local echo is invoked through the ATE1 command. The com-
mand causes the modem to display your typed commands.
When the modem is online to another system, the local echo is
invoked through the ATF0 command. This command causes
the modem to display the data it transmits to the remote
system.
MI/MIC
Mode Indicate/Mode Indicate Common, also called Forced or
Manual Originate. Provided for installations where other
equipment, rather than the modem, does the dialing. In such
installations, the modem operates in Dumb mode (no Auto Dial
capability), yet must go off hook in Originate mode to connect
with answering modems. See MI/MIC Closure in Appendix G.
MNP
Microcom Networking Protocol, an asynchronous error control
protocol developed by Microcom, Inc. and now in the public
domain. The protocol ensures error-free transmission through
error detection (CRC) and retransmission of errored frames.
U.S. Robotics modems use MNP Levels 1
− 4 and Level 5 data
compression. MNP Levels 1 − 4 have been incorporated into
ITU-T Recommendation V.42. Compare HST.
Modem
A device that transmits/receives computer data through a com-
munications channel such as radio or telephone lines. The
Courier is a telephone channel modem that modulates, or trans-
forms, digital signals from a computer into the analog form
that can be carried successfully on a phone line. It also
demodulates signals received from the phone line back to
digital signals before passing them to the receiving computer.