Avaya Configuring Dial Services Bedienungsanleitung Seite 78

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Configuring Dial Services
2-4 114062 Rev. B
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.
To implement dial-on-demand, the router establishes a demand circuit (that is, the
logical connection) over a physical line. The router establishes a demand circuit
when
The router has data to send across the circuit.
You specify a time of day to activate the circuit.
You enable the Force Dial parameter, which instructs the router to force a
connection.
The router terminates the circuit when
The configured inactivity time expires because the router is not sending or
receiving data.
You schedule a time of day to take the circuit down.
You enable the Force Take Down parameter, which instructs the router to
force the termination of a connection.
Refer to “Acti
vating Demand Circuits” on page 2-9 for more information.
Dial-on-demand is supported on asynchronous (RS-449), synchronous (RS-449,
V.35, RS-422, and X.21), and ISDN interfaces. Figure
2-2 shows a demand line
connecting two routers. When the router has data to transmit or when you
configure the router to bring up a demand circuit, the router instructs the dial
device to establish a connection.
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