Installation and Reference for the BayStack 820 ISDN Router
1-4
206901-A
ISDN Support
The BayStack 820 ISDN Router is specifically designed to take advantage of
ISDN for transmission of data over digital telephone networks. A basic rate
interface (BRI), which is the usual ISDN implementation, consists of two 64
kilobits per second (Kb/s) B channels for data and one 16 Kb/s D channel for
control information.
The router supports bandwidth on demand, a feature that minimizes bandwidth
consumption because a connection is established only if there is data to be sent to
a remote site. The router does not establish a connection until there is a request to
do so. For example, when a user on one network tries to access another network
on your private WAN (or tries to access the Internet), the router establishes a B
channel connection to the remote network. As traffic to the remote network
increases and bandwidth demand increases, the router establishes another
connection to the Internet through the second B channel and routes traffic through
that connection as well. As traffic decreases, the router disconnects the second B
channel. And after a specified period of inactivity, the router disconnects the
remaining B channel.
Connectivity Features
The BayStack 820 ISDN Router supports several connectivity features, including
branch-to-branch access, placing conventional telephone calls over ISDN lines,
remote dial-in access, Internet access, private server access over public networks,
and virtual private networking (VPN).
Содержание BayStack 820
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