T1 AND E1 REMOTE ACCESS CONCENTRATORS
12
2. Introduction
NOTE
This manual is intended to help you get your Remote Access Concentrator up and
running. It isn’t a detailed reference on the Concentrator’s operation; for more
complete information, use a standard browser to pag e through the HTML
documentation included on CD with the Concentrator. Also, you might want to check
our Black Box Web site (www.blackbox.com) for material that might be more up-to-
date than what you received, including software or firmware updates, updated MIBs,
and revised HTML documentation.
Enterprises seeking increased productivity and communication are extending dial-up access to their
telecommuting employees and business partners, and service providers are searching for ways to differentiate
their dial-up services to retain existing customers and attract new ones.
But this expansion in access is creating new challenges in the areas of security, accounting, and network
management. Our T1 and E1 Remote Access Concentrators (the LRA3000 series of product codes) directly
address these challenges by delivering the lowest-cost dial solutions with support built in for using RADIUS
for remote device authentication.
The Concentrators support high-density ISDN/V.90 concentration of dial-up traffic in a compact, rack-
mountable form factor. The Concentrators’ architecture supports universal dial access (ISDN or modem) on
every port, yielding excellent price/performance in a slender design that’s only 1U (1.8", 4.4 cm) high. Both
T1 and E1 versions are available, supporting two ISDN Primary Rate Interfaces (PRIs) and either 48 (T1)
or 60 (E1) DS0 connections; the DS0s can be any combination of V.90 (56K) modem and ISDN calls.
All Concentrators have redundant power supplies for added protection in mission-critical applications.
We also offer Connection Services Manager (CSM) software (our product code LRA300SW) for use with the
Concentrators. It performs remote device authentication, supports robust connection management, and gives
you real-time control over remote user authentication, policy definitions, and accounting from a centralized
server. More information about CSM is available in the HTML documentation on the CD that came with
your Concentrator.
The table below summarizes each Concentrator model’s options.
Model
WAN
Telco Interface(s)
Number of V.90
Access
Digital Modem Ports
LRA3000A
T1
Dual ISDN T1/PRI
48
LRA3001A
E1
Single ISDN E1/PRI
30
LRA3002A
T1
Single ISDN T1/PRI
24
LRA3003A
E1
Dual ISDN E1/PRI
60
NOTE
The T1 models support ISDN Primary Rate Interface (PRI) in Canada, the United
States, and Japan. The E1 models support ISDN Primary Rate Interface (PRI) in
Europe, the Asia-Pacific region (excluding Japan), and Latin America.
