Avaya Configuring Dial Services Uživatelský manuál stáhnout pdf (Strana 134)

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Configuring Dial Services

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BRI Leased-Line Operation for Germany and Japan

For BRI service in Germany and Japan, you can configure 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 and is useful

when ISDN service providers do not use the D channel.

Leased-line operation supports PPP, Nortel Networks Standard, and frame relay.

You select leased-line operation when you configure the application mode, that is,

the type of BRI service, for the BRI interface. To set the application mode using

Site Manager, see “Configuring BRI Lines” on page 2-9. To set the application

mode using the BCC, see “Configuring BRI Lines” on page 3-12.

To modify the leased-line configuration, see “Modifying the BRI and PRI Modes

of Operation” on page 11-2.

BRI Subaddresses

The ITU-T specifies that one 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 whether it is the intended receiver.

If not, the router ignores the call.

Floating B Option for the AN and ANH

If your ISDN service provider offers only 2B + D service, the floating B option for

the AN and ANH enables you to use only one B channel for dial service

applications. Floating B is an alternative if you cannot purchase 1B + D service.

If your service provider offered only 2B + D service, the AN and ANH CPU

would use two of its four serial communication controllers (SCCs) for the two B

channels, one SCC for the Ethernet link, and one SCC for a synchronous link.

Using the floating B option, you use only one B channel at a time, freeing up an

SCC for an additional synchronous link.

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