Avaya Configuring Dial Services Manual do Utilizador Página 49

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Dial Services Overview
114062 Rev. A 1-19
A router at one side of the link monitors byte counts for data it sends and receives.
This router is called the congestion monitor. The congestion monitor uses these
byte counts, along with bandwidth-on-demand monitor parameters, to determine
when to activate additional lines for more bandwidth. The router then uses all the
available lines in the bundle to send data across the network.
Bandwidth-on-Demand Lines and Pools
A bandwidth-on-demand pool is a collection of dial-up lines that a congested
leased line, demand line or multilink bundle can use. Each bandwidth-on-demand
pool is identified by a bandwidth-on-demand pool ID.
In a bandwidth-on-demand pool (herein referred to as bandwidth pool), you may
combine asynchronous, synchronous, or ISDN lines in a single pool. These lines
connect to a modem or directly to an ISDN network (using a router with integral
ISDN capability). The asynchronous and synchronous interfaces may use
Raise DTR or V.25bis signaling, while the ISDN lines use ISDN signaling.
Lines in a bandwidth pool may operate at different speeds. PPP multilink, the
protocol the router uses for bandwidth-on-demand circuits, can manage lines of
varying speed, distribute traffic across lines, and monitor traffic.
When a leased line or bundle becomes congested, the router searches for an
available dial-up line from its associated bandwidth pool. Lines in a bandwidth
pool can reside on any slot, but out of the total slots in a pool, each secondary
circuit may use only three slots.
To determine the order of slots the router searches, 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. The local slot is the slot containing the
first leased line that came up. Once the router finds a line, it dials the destination
using a phone number from the user-configured outgoing phone list.
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