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Introduction
This chapter outlines the features and uses of the AccessBuilder 7000
Bridge/Router Module when installed in the AccessBuilder 7000 Access
Concentrator chassis. There are two versions of the Bridge/Router Module:
■
BRI Bridge Router Module
– Connects directly to two Basic Rate ISDN
lines (four ISDN channels) and has two WAN ports for connection to
leased line services.
■
PRI Bridge Router Module
�� Connects to the Primary Rate ISDN service
through the PRI Interface Module. This module provides up to eight ISDN
channels and has two WAN ports for connection to leased line services.
The bridge/router modules allow geographically separate LAN
workgroups and remote office users, to connect to central computing
facilities through either, a dial-up on demand connection over the
integrated services digital network (ISDN), or permanently connected
leased lines.
The Bridge/Router Module also has two ports for connection over
permanent leased line WAN connections, also available from your
telephone carrier organization. Leased lines are available to work at a
range of speeds which incur higher costs the higher the line speed. The
benefit of leased lines is their permanence and fixed cost. No dialling is
required, but unlike ISDN, you pay a fixed cost regardless of whether you
transfer little data or high volumes of data 24 hours a day.