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Front Panel Operation
CDM-760 Advanced High-Speed Trunking Modem
o The modem is NOT in Demo Mode. If the timer reaches 00:00:00:00, the modem will
turn its Tx Off and the circuit will be down.
•
Time Remaining Refills In – This is the calendar year counter that resets FractionalCnCTime
Remaining to its 90 full days of CnC usage when it reaches 00:00:00:00. This counter
continually decrements and even accounts for time when the modem is powered Off. Once
this timer fully decrements, Time Remaining Refills In once again resets to 365:00:00:00 and
immediately begins to decrement.
1) Fractional CnC:Time Remaining cannot be reset or refilled in the field. Once
the timer has run out, your only options are to:
•
Upgrade the modem to fully functional CnC.
•
Wait until "Time Remaining Refills In" reaches 00:00:00:00.
2) Using Fractional CnC is not a normative mode of operation. To best inform
you that your modem is running Fractional CnC (i.e., the
"FractionalCnC:Time Remaining" counter is actively decrementing), your
modem does the following:
•
The RED Unit Status LED on the front panel of the modem will blink on
and off.
•
The modem generates an Event in the Event Log every 12 hours
indicating that Fractional CnC is running.
•
When connected to a 1:1 redundant switch, the modem generates a
phantom fault every 12 hours, allowing the fully operational CnC
modem to return online if its fault has cleared.
6–77
Revision 4
MN-CDM760
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