Avaya Configuring Dial Services Bedienungsanleitung Seite 54

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Configuring Dial Services
3-4
Figure 3-1 shows the router’s place in a sample ISDN network.
Figure 3-1. Router in an ISDN Network
BRI Leased-Line Operation for Germany
For BRI service in Germany, the router allows you to support a permanent,
point-to-point ISDN connection over a B channel without having to use the D
channel to dial the call. This connection operates like a leased line. This option is
useful when ISDN service providers do not use the D channel.
Leased-line operation supports PPP, Bay Networks Standard, and Frame Relay
protocols.
Site Manager allows you to select leased-line operation when you configure the
application mode for your BRI interface. Refer to Chapter 4 for more information.
BRI Subaddresses
The ITU-T specifies that the same S/T interface can have eight different TE
devices, for example, routers. However, the service provider may assign only one
phone number for the customer-side of the local loop. To determine the specific
destination of the call, the router uses a subaddress.
Each router has an assigned subaddress for which it will accept calls. The
subaddress must be part of the incoming call setup message sent to the router.
Based on the subaddress, the router determines if the call is intended for it. If not,
it ignores the call.
Router
Digital
Line
S/T
U
TE1 NT1
ISDN
Network
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