Mocomtech CRS-300 - Manual (Page 189)

CRS-300 1:10 Redundancy Switch Revision 16
Front Panel Operation MN/CRS300.IOM
7–9
7.4.3 CONFIG: OPTIONS
OPTIONS: PRIORITY
HOLDOFFS ALARM-MASK
These options define how the Switch will react to various faults. Select PRIORITY, HOLDOFFS,
or ALARM-MASK, using the ◄ ► arrow keys, then press
[ENT] .
CONFIG: OPTIONS Æ PRIORITY
If PRIORITY is selected:
PRIORITY: POSITION 2
UP/DOWN, THEN ENTER
If one link is considered more important than all others, this feature enables the User to prioritize
that link. For example, if the Switch is in Auto mode and it is already backing-up a link that is not
a priority link. If the priority link now fails, the link will be restored regardless of its fault state.
The priority link will now be bridged and then backed up.
Note: Only activated TMI slots will be available for selection as the ▲ ▼ arrow keys are pressed.
CONFIG: OPTIONS
Æ HOLDOFFS
If HOLDOFFS is selected:
BACKUP HOLDOFF SEC: 05
RESTORE HOLDOFF SEC: 10
Use the ◄ ► arrow keys to switch between the Backup and Holdoff settings, then use ▲ ▼ arrow
keys to adjust the time (in seconds). Both Holdoffs can be set from 1 to 99 seconds.
When the Backup and Restore Holdoff times have been edited, press [ENT] to configure.
The User may set the Holdoffs (delay times) between the Switch’s modem alarm detection and its
reaction to the event. These Holdoffs are only applicable when the Switch is in Auto mode. When
an active modem exhibits an unmasked fault, the Switch bridges it with the Redundant Modem
and checks that the latter is not also faulted. If there is no fault, the Backup Holdoff determines
how long the Switch will wait before performing the actual backup, or switchover of traffic to the
Redundant Modem.
Note: If the CDM-Qx configuration includes Carrier-in-Carrier
®
, this Holdoff time should be no
less than 8 seconds.
When the Switch is currently backing up a Traffic Modem, and that offline modem’s fault clears,
the Switch will continue to back it up unless another active modem becomes faulted. In this case,
the Restore Holdoff is the length of time that the originally faulted modem must stay unfaulted
before the Switch will automatically put it back online so that the Redundant Modem is available
to bridge the newly faulted modem.