User manual

GLOSSARY
7-9
14,400 bps. V.32 bis modems fall back to the next
lower speed when line quality is impaired, fall back
further as necessary, and also fall forward (switch
back up) when line conditions improve (see online
fall back/fall forward).
V.34
An ITU-T standard that currently allows data rates
as high as 28,800 bps.
V.34+
An enhancement to V.34 that enables data transfer
rates as high as 33,600 bps.
V.42
An ITU-T standard for modem communications
that defines a two-stage process of detection and
negotiation for LAPM error control.
V.42 bis
An extension of ITU-T V.42 that defines a specific
data compression scheme for use during V.42
connections.
V.90
The ITU-T standard for 56 Kbps modem
communications. This technology uses the digital
telephone network to increase the bit rate of the
receive channel by eliminating the analog to digital
conversion commonly found in modem connections.
V.90 connections require a modem with V.90 or x2
technology calling a digitally connected Internet
Service Provider or corporate host site compatible
with V.90 or x2 technology.
World Wide Web
A part of the Internet designed to allow easier
navigation of the network through the use of
graphical user interfaces and hypertext links
between different addresses.
x2 Technology
3Com’s trademark for its proprietary technology
that uses the digital telephone network to increase
the bit rate of the receive channel by eliminating
the analog to digital conversion commonly found in
modem connections. x2 connections require a
modem with x2 technology calling a digitally
connected Internet Service Provider or corporate
host site compatible with x2 technology.
Xmodem
The first of a family of error control software
protocols used to transfer files between modems.