Comtech EF Data CDM-760 User Manual
Page 156
Front Panel Operation
Revision 2
CDM-760 Advanced High-Speed Trunking Modem
MN-CDM760
6–70
6.2.8.3 (FAST:) CnC
FractionalCnC:Time Remaining: 90:00:00:00
Time Remaining Refills In 364:23:59:31
Full CnC License is installed.
Fractional CnC is common in 1:1 or 1:N redundancy systems where the primary modem is
running fully operational (i.e., FAST-activated) CnC, and the backup modem(s) has FAST-
activated Fractional CnC.
Fractional CnC allows 90 full calendar days of CnC usage in a calendar year. This lowers the cost
of the modem but does not allow for constant, round-the-clock CnC operation.
As per the previous screen examples, if Fractional CnC is not installed in the CDM-760, the
modem displays a message that no CnC license is installed and provides “time remaining” and
“time remaining refill” timers; or that a Full CnC license is installed and the screen displays no
timers. Note the following:
•
FractionalCnC: Time Remaining – This is the amount of time, in the form dd:hh:mm:ss
(days: hours:minutes:seconds), that that the modem can be run in CnC mode. This counter
decrements under the following conditions:
o
The modem has a FAST-activated Fractional CnC license
o
The modem is powered ON
o
The modem’s Tx is ON
o
The modem is in standalone mode or in 1:1 redundancy configuration and is Online
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.
Fractional CnC:Time Remaining cannot be reset or refilled in the field. Once
the timer has run out, your only options are to:
1)
Upgrade the modem to fully functional CnC.