Comtech EF Data CRS-300 - Manual (Page 203)

CRS-300 1:10 Redundancy Switch MN/CRS300.IOM
Front Panel Operation Revision 19
6–9
In MANUAL mode, the STORED EVENT indicator blinks to alert you that the Switch is effectively
not in use.
The CDM-7XX modems have Faults and Alarms. For these modems, AUTO Switch
Mode will react only to modem Faults; modem Alarms will be ignored.
6.2.2.3 CONFIG: OPTIONS
OPTIONS: PRIORITY
HOLDOFFS ALARM-MASK
These options define how the Switch will react to various faults. Use the ◄ ► arrow keys to
select from the choices shown, and then press [ENT].
6.2.2.3.1 CONFIG: OPTIONS  PRIORITY
PRIORITY: POSITION 2
UP/DOWN, and then
ENTER
If one link is considered more important than all others, this feature enables you 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.
Only activated TMI slots will be available for selection as the ▲ ▼ arrow keys
are pressed.
6.2.2.3.2 CONFIG: OPTIONS  HOLDOFFS
BACKUP HOLDOFF SEC: 05
RESTORE HOLDOFF SEC: 10
Use the ◄ ► arrow keys to switch between the BACKUP and HOLDOFF settings. Then, use the
▲ ▼ arrow keys to adjust the time (in seconds). Both HOLDOFFs can be set from 1 to 99
seconds.
Edit the BACKUP and RESTORE HOLDOFF times, and then press [ENT].
You may set the HOLDOFFs (delay times) between the Switch’s modem alarm detection and its
reaction to the event. These HOLDOFFs apply only 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.