Enterasys Networks CSX7000 Manuel d'utilisateur télécharger pdf (Page 382)

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USER’S GUIDE

382 CyberSWITCH

Call Restrictions

You may wish to disable call restrictions when using semipermanent connections. Call restrictions

are mainly intended for use in areas where “per minute” ISDN tariffs are in place. Typically, this

in not the case if semipermanent connections are in use.

If you decide not to disable Call Restrictions, we recommend that you make the following Call

Restriction parameter alterations:

• Change the maximum call duration to warn only.

• Add 1,440 minutes to the Call Minutes per Day for every call in a configured semipermanent

connection.

• Add 43,200 minutes to Call Minutes per Month for every call in a configured semipermanent

connection.

• Allow calls for all hours in the day.

Refer to the instructions for changing the parameter values.

Throughput Monitor

The semipermanent connection feature, along with the throughput monitor, interact to prevent the

CyberSWITCH from dropping calls which are part of the semipermanent connection.

However, specific considerations apply to the use of the Throughput Monitor. Consider these two

situations:

1. To connect two systems together with semipermanent connections:

For each system, configure a semipermanent connection to the other, and enable Throughput

Monitoring on both.

However, you may occasionally see a “glare” condition (i.e., both machines attempting to

reestablish the connection after a network or power outage). This “glare” condition will not

occur if the semipermanent connection utilizes the entire bandwidth available at either system

site. Normal throughput monitoring will drop the extra call if traffic allows.

If this glare condition is unacceptable, you may either:

• Delete all Dial-Out phone numbers (through CFGEDIT, Device List entries) for one of the

sites. The other site (that still has Dial-Out configured) will then create the semipermanent

connection.

• Treat one system as a device which does not support semipermanent connections. (See

item 2, which follows).

2. To connect an system to a machine that does not support semipermanent connections, disable

Throughput Monitoring at the remote device.

If neither of these options are used, the remote device may periodically drop calls which are

members of a semipermanent connection. The semipermanent connection feature will stop making

calls if the number of connections dropped reaches the maximum within configured time limit. If

this happens, you will need to use the

call device

command to restart the feature.

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Enterasys Networks CSX7000 Manuel d'utilisateur Page 382

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