Beta Draft Confidential
7-161/19/05 ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000
Configuring Trunks
About Trunk Backup for the B-STDX 9000
Process for Switching Over to a Backup Trunk
In the event of trunk failure, the system uses the following process to automatically
switch over to a defined backup trunk if you have enabled Automatic Trunk Backup
(see step 5 on page 7-15).
1. The system switches over to the backup trunk after the trunk is out of service for
the amount of time specified for the primary trunk in the Trunk failure threshold
field (see Figure 7-7 on page 7-21).
2. The system resumes using the primary trunk after it is in service for the period of
time specified in the Trunk Restoration Threshold field (see Figure 7-7 on
page 7-21).
Activating or Terminating a Backup Trunk Manually
You can override the values for automatic trunk backup by using the manual trunk
backup feature.
To activate or terminate a backup trunk manually:
1. In the Switch tab, expand the Trunks node.
2. Right-click on the node for the primary trunk and choose one of the following
commands from the pop-up menu as shown in Figure 7-3:
• Choose Activate Backup Trunk to initiate the manual backup.
• Choose Terminate Backup Trunk to end the manual backup.
Figure 7-3. Activating or Terminating a Backup Trunk
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