Eicon Networks DIVA T/A ISDN Modem Guia do Utilizador Página 54

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Chapter Five: Minimizing ISDN Charges Configuring AO/DI
54
4.
Click the More button next to the Protocol field. You will see the following page.
5.
Set the BACP parameters as required.
6.
Click Save.
7.
Click Finish.
8.
Click Save.
9.
Click Reset.
Configuring AO/DI
AO/DI lets you maintain a permanent connection to the Internet or a corporate network, without tying up an
expensive ISDN B-channel. AO/DI accomplishes this by using the ISDN D-channel to establish a
low-bandwidth (9.6 kbps) connection with your ISP or corporate network. When incoming or outgoing traffic
exceeds the capabilities of the D-channel, AO/DI automatically invokes one or more B-channels to handle the
increased traffic.
Some advantages of AO/DI include:
Makes maintaining a permanent connection to the Internet more cost effective. With such a connection,
remote users can connect with the DIVA LAN ISDN Modem from any remote location that has Internet
access. This eliminates the need to dial in via ISDN. (To make the connection permanent you must set the
idle timer to 0. See page 51.)
Ideal solution for connecting to a remote corporate network, because low-bandwidth keep alive traffic can
use the D-channel, instead of constantly bringing up a B-channel.
You customize how AO/DI opens and closes B-channels by setting the following parameters.
Delay for opening the 1st
B-
channel:
Sets the amount of time data traffic on the ISDN D-channel must
exceed the specified Threshold value, for AO/DI to bring up the first B-channel.
Threshold for opening the 1st
B-
channel:
Sets the percentage of total bandwidth on the D-channel that
must be exceeded, for AO/DI to bring up the first B-channel.
Delay for closing the 1st
B-
channel:
Sets the amount of time data traffic on the ISDN D-channel must be
below the specified Threshold value, for AO/DI to drop the first B-channel.
Threshold for closing the 1st
B-
channel:
Sets the percentage of total bandwidth on the D-channel that
traffic must be below, for AO/DI to drop the first B-channel.
Delay for opening the 2nd
B-
channel:
The amount of time data traffic on the first B-channel must
exceed the specified Threshold value, for AO/DI to bring up the second B-channel.
Threshold for opening the 2nd
B-
channel:
Sets the percentage of total bandwidth on the first B-channel
that must be exceeded, for AO/DI to bring up the second B-channel.
Delay for closing the 2nd
B-
channel:
Sets the amount of time data traffic on the first B-channel must be
below the specified Threshold value, for AO/DI to drop the second B-channel.
Threshold for closing the 2nd B-channel:
Sets the percentage of total bandwidth on the first B-channel
that traffic must be below, for AO/DI to drop the second B-channel.
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