Eicon Networks DIVA LAN ISDN - Manual (Page 61)

Chapter Five: Minimizing ISDN Charges Configuring BACP 61
Configuring BACP
The bandwidth allocation protocol (BACP) works in conjunction with the MLPPP connection protocol to
regulate usage of your ISDN line. The DIVA LAN ISDN Modem uses BACP to monitor incoming and
outgoing traffic, and to open or close the second ISDN B-channel as the traffic volume warrants. This reduces
your communications charges by ensuring that two ISDN channels are never active when one is sufficient.
You customize how BACP opens and closes B-channels by setting the following parameters.
• Delay for opening the 2nd B-channel: Sets the amount of time data traffic on the first ISDN B-channel
must exceed the specified Threshold value, for BACP 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.
• Delay for closing the 2nd B-channel: Sets the amount of time data traffic on the first ISDN B-channel
must be below the specified Threshold value, for BACP 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 BACP to drop the second B-channel.
The relationship between these parameters is best illustrated with an example. Assume the parameters are set
as follows:
• Delay for opening the 2nd B-channel: 5
• Threshold for opening the 2nd B-channel: 50
• Delay for closing the 2nd B-channel: 5
• Threshold for closing the 2nd B-channel: 40
When traffic on the first B-channel exceeds 32 kbps (50% of 64 kbps) for five seconds, BACP enables the
second B-channel. The second B-channel remains active until traffic on the first B-channel falls below 25.6
kbps (40% of 64 kbps).
To configure BACP
Each profile that uses BACP will have its own BACP settings. To configure BACP for a profile, do the
following:
1. On the Configuration main menu, click Connection Profiles.
2. Click Edit for the profile you want to configure BACP for. You will see the following page.
3. If you have not selected MLPPP + BACP as the Protocol, do so now.