Avaya Configuring Dial Services Manual de usuario descargar pdf (Pagina 35)

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Dial Services Overview

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The method you choose depends on your application, network resources, and the

type of network to which you are connecting. ISDN, a complex networking

technology, is further explained in Chapter 4.

Dial-on-Demand Service

Dial-on-demand service enables you to establish a network connection only when

the router has data to send across the network, or when you dynamically configure

the router to establish a connection. By using dial-up lines, you significantly

reduce the high costs associated with leased lines, which connect remote locations

even if there is no data to transmit or receive.

Activating Demand Circuits

To implement dial-on-demand, the router establishes a demand circuit. The router

activates a demand circuit when:

• The router has data to send across the circuit.

When the router has data to transmit, it automatically selects one of the

demand lines from the circuit’s associated demand pool. As long as data is

going across the line, the end-to-end connection remains active.

• You enable the Force Dial parameter, which instructs the router to force a

connection.

To activate a line immediately, you configure the Force Dial parameter to

force the router to initiate a connection, regardless of whether there is data

activity. To configure this parameter, see “Forcing the Circuit to Activate or

Deactivate” on page 12-8.

• You specify a time of day to activate the circuit.

Using the Schedule option, you can schedule the circuit’s availability for a

specific day and time. The schedule parameters are part of the circuit’s

configuration (see “Scheduling Demand Circuit Availability” on page 12-37).

The Schedule option also allows you to specify whether the router uses the

Inactivity Timeout parameter to dynamically deactivate the connection.

The router does not accept incoming calls or activate frame relay demand circuits

if there is an incoming call from the frame relay network. The router answers an

incoming call only over a PPP circuit.

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