Verilink PRISM 4101 (34-00230) Product Manual - Manual (Page 59)

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circuit such as PSTN or ISDN line. The Dial Backup screen (Figure 4-14) allows
you to configure the DBU parameters.
Figure 4-14 DBU Parameters Screen
Status
Shows the current state in the left brackets and the programming choices in the
right brackets.
DISABLED - DBU has been disallowed via the Command field.
ENABLED - The DBU is allowed but is not currently needed.
DISALLOWED - The DBU has been set for ENABLE DAILY but the current time
is outside of the allowed window specified by the DBU Activation Periods fields.
DIALING, CONNECTING - Establishment of the DBU is in progress.
ANSWERING - The unit is waiting for the other end to call it.
ACTIVE - The DBU is currently active.
Command
The available DBU commands are as follows:
DISABLE - DBU is disabled.
ENABLE - The DBU will activate when the DDS line fails.
ENABLE DAILY - The DBU will only activate if the time is set in the DBU
Activation Periods.
ACTIVATE - Manually activates the DBU function.
Activator
This field allows you to select the criteria the unit uses to activate the dial backup
sequence. The choices are LOS, OOS, OOF, or ANY alarm thresholds.