Beta Draft Confidential
7-261/19/05 ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000
Configuring Trunks
Working With Trunks
2. Complete the fields as described in Table 7-4.
3. Choose OK to complete the configuration and close the Add Trunk dialog box. 
Table 7-4. Add Trunk: Primary Options Tab Fields
Field Action/Description
Initiate Backup Call 
Setup
Select the check box (default) to initiates the setup for a 
backup call. Clear the check box to disable this feature. 
Call Setup Retry 
Interval (sec): 
(0-255)
Indicates the lapse of time (in seconds) between each retry 
during a given retry cycle. Enter a value in seconds. The 
default is 15 seconds.
No. of Retries/Setup 
Cycle: (0-255)
Indicates the number of retries that the system performs 
during a retry cycle. Enter a value for number of retries. The 
default is 20 retries.
Retry Cycle Interval 
(min.): (0-1092)
Indicates the lapse of time between retry cycles. Enter a 
value in minutes. The default is 10 minutes.
Backup on Trunk 
Failure
Select the check box (default) to enable automatic trunk 
backup for this trunk. Clear the check box to disable this 
feature.
Trunk Failure 
Threshold (sec)
Displays the time the primary trunk remains down before the 
switch enters into a call setup retry cycle to enable the 
backup trunk(s). Enter a value in seconds. The default is 5 
seconds.
Trunk Restoration 
Threshold (sec)
Displays the time the system will wait for the primary trunk 
to become functional before resuming its use as the primary 
trunk. Prevents switch-over to a primary trunk that has only 
been temporarily restored. Enter a value in seconds. The 
default is 15 seconds.