Avaya Configuring Dial Services Uživatelský manuál stáhnout pdf (Strana 56)

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Configuring Dial Services

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You can combine asynchronous, synchronous, and ISDN interfaces in a single

pool. The synchronous interfaces can use Raise DTR or V.25bis signaling for

modem connections. The asynchronous interfaces can use Raise DTR, V.25bis, or

Hayes signaling for modem connections. Hayes signaling requires that you use AT

modem commands to send dialing instructions to the modem. The ISDN lines use

ISDN signaling for network connections.

Lines in a bandwidth pool may operate at different speeds. PPP multilink, the

protocol that the router uses for bandwidth-on-demand circuits, can manage lines

of varying speed, distribute traffic across lines, and monitor traffic. The router

may also use BAP to manage bandwidth allocation.

When a leased line or bundle becomes congested, the router searches for an

available dial-up line from its associated bandwidth-on-demand pool. Lines in a

bandwidth-on-demand pool can reside on any slot, but each secondary circuit can

use only three slots.

To determine the order in which the router searches the slots, you designate each

slot as preferred or reserved. The router uses the preferred slot first. If there are no

available lines, the router uses the reserved slot. If there are still no available lines,

the router automatically uses the local slot, which is the slot containing the first

leased line that was activated. When the router finds a line, it dials the destination

using a phone number from the user-configured outgoing phone list.

How Lines, Pools, and Circuits Work Together

You assign a bandwidth pool ID for each leased circuit or demand circuit. If the

line or bundle becomes congested, the router activates a dial-up line from the pool.

The dial-up circuit that runs over this line inherits the configuration and protocol

characteristics of the leased circuit.

You can assign the same bandwidth pool ID to more than one circuit. If you want

a pool of dial-up lines dedicated to a specific bandwidth circuit, assign the pool

exclusively to that circuit. Remember to first configure a leased or demand

connection before configuring bandwidth-on-demand service.

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