Nortel BayStack 820, Installation And Reference Manual

Page: 35 / 258

Introduction
206901-A
1-5
Branch-to-Branch Access
You can create a private wide area network (WAN) using two or more BayStack
820 ISDN Routers and enable two or more remote networks to connect to one
another to share resources.
Figure 1-1 illustrates how two BayStack 820 ISDN Routers support a WAN
connection for branch-to-branch access.
Figure 1-1. Two ISDN Networks Connected with Routers
Conventional Telephone Calls Over ISDN
You can connect telephone or fax devices to the two voice ports on the router and
place a conventional voice call over a Public Switched Telephone Network
(PSTN) by dialing a regular telephone number. The call is established over a
single ISDN B channel and, if applicable, incurs the same kind of charges as a
regular phone call.
You can also configure convenient speeddial shortcuts to place phone calls in a
seamless manner.
Note: If the remote network uses an ISDN router from another vendor, the
router must support LAN-to-LAN communications.
BayStack 820 ISDN Router
ISDN
network
Your LAN #1 Your LAN #2
BayStack 820 ISDN Router
9394FA