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61203153L2-20 Express 3000 User Manual 1-1
Chapter 1
Overview
The ADTRAN Express 3000™ is a stand-alone ISDN modem that is
ideal for remote access and Internet connectivity. The Express 3000
transmits data at speeds up to 230.4 kbps when using hi/fn compres-
sion and up to 512 kbps when using Microsoft compression. The
Express 3000 includes ISDN terminal adapter and network termina-
tion functionality, eliminating the need for an external NT-1 device.
The unique modem port on the rear of the Express 3000 allows an an-
alog modem and the Express 3000 to operate from the same computer
serial port on a PC or Macintosh.
AO/DI
The Express 3000’s Always On/Dynamic ISDN (AO/DI) technology
allows a virtual connection to a corporate network or to the Internet
while conserving costs. AO/DI allows data transmission over the low
bandwidth D channel using the X.25 packet network. As demand for
greater bandwidth is presented to the Express 3000, B channels are
added to accommodate the increased data flow. As demand for band-
width decreases, B channels are automatically disconnected to con-
serve bandwidth and the cost associated with using a B channel. To
use this service, your Internet Service Provide (ISP) or remote access
provider must support AO/DI.
EXPRESS CONFIGURATION SOFTWARE
ADTRAN’s Express Configuration software, included with the
Express 3000, makes connecting to ISDN and configuring the
Express 3000 easy. This software includes on-line help to assist you in
quickly and easily setting up your system (see also
Using On-line Help
on page 3-5). Expert ISDN, part of the Express Configuration soft-
ware, contains sophisticated patented algorithms that automatically
detect the telephone company parameters such as Switch Type and