Nortel BayStack 820, Installation And Reference Manual

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Installation and Reference for the BayStack 820 ISDN Router
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Figure 1-2 illustrates how a voice call is placed through the router over ISDN.
Figure 1-2. Conventional Telephone Calls over ISDN
Remote Dial-In Access
You can configure the BayStack 820 ISDN Router to allow remote users to
connect to your LAN and share resources when they are away from the office and
stay productive they are at home or on the road.
Using the call back feature, you can configure the router to allow dial-in access
for remote users while protecting your network against unauthorized users. After
a user dials in and is authenticated, the router disconnects the line and then calls
the user back at a preconfigured telephone number.
Figure 1-3 illustrates how the
BayStack 820 ISDN Router supports dial-in access by remote users.
Figure 1-3. Dial-In Access to a LAN
BayStack 820 ISDN Router
ISDN
network
PSTN
network
Phones connected to Router #1
9438FA
BayStack 820 ISDN Router
Telephone
network
Your LAN
Dial-in users
ISDN
ISDN
9393FA