The TimeProvider operates with one or two Input/Output and Clock Modules (IOC) for redundant or non-redundant operation. The IOC accepts the incoming reference signal and decodes the SSM if present. With the system properly provisioned and a reference signal selected, the local oscillator in the IOC operates in one of the following modes:
After the IOC has been in the Normal lock mode for at least three days, SmartClock holdover mode becomes available. Compared to the normal holdover mode, SmartClock holdover mode provides a superior output quality.
Explanation |
|
INSRV |
In Service. IOC is working correctly and may be used for output signal generation |
OOSRV |
Out of Service. IOC has been taken out of service, it will not be used to generate outputs or monitor inputs. No alarms are generated by the IOC. |
IOC Status |
Explanation |
OK |
OK. IOC is working correctly and can be used for output signal generation. |
ALM |
Alarm. An IOCFAIL alarm was reported. The IOC may not be producing outputs or monitoring inputs. |
Explanation |
|
ACTIVE |
Active. IOCs work as a pair with one active and the other in standby in a one plus one protection mode. The active IOC produces the signal output and monitors the inputs. The active IOC goes to standby if ordered by command, on circuit pack removal, or on IOC failure. |
STANDBY |
Standby. IOC is not in standby mode. |
Clock Mode |
Explanation |
Warm-up |
For up to 20 minutes after applying power to the shelf, the IOC operates in warm-up mode. |
Fast-lock |
After warm-up is complete, the IOC enters the fast-lock state and frequency-locks the local oscillator to the reference input. |
Normal lock |
After the IOC has completed the fast-lock cycle, it enters the normal lock mode and the TimeProvider uses the proper amount of filtering for the selected mode. When set to the SSU mode and locked to an active input traceable to a Primary Reference Source (PRS), the TimeProvider complies with the G.811 and GR-2830-CORE standards. |
Holdover |
If the reference signal is lost, the clock enters holdover mode. The accuracy of the TimeProvider output is then dependent on the quality level of the oscillator in the IOC. |
Free-run |
If the IOC starts without a system reference, the TimeProvider enters the free-run state after warm-up. If a reference is applied, the TimeProvider enters the fast-lock and then the normal-lock states. |
Explanation |
|
Type 1 |
The Type 1 oscillator meets or exceeds the ITU-T G.812 TYPEI specification. |
ST3E |
The ST3E oscillator meets or exceeds the ST3E requirements in ANSI T1.101 and Telcordia GR-244, as well as the ITU-T G.812 TYPE III specification. |
Comms Status |
Explanation |
IMC1COMM-OK |
IOC1 to IMC communication established. |
IMC1COMM-FAIL |
IOC1 to IMC communication failed. |
IMC2COMM-OK |
IOC2 to IMC communication established. |
IMC2COMM-FAIL1 |
IOC2 to IMC communication failed. |
Highest Alarm |
Explanation |
OK |
No alarms reported. |
CRITICAL |
Critical alarm is the most sever alarm reported. |
MAJOR |
Major alarm is the most sever alarm reported. |
MINOR |
Minor alarm is the most sever alarm reported. |
LED Name |
Condition |
Description |
Power |
Green Off Flashing Green |
Power is On Power is Off Warming Up |
Fail |
Red Off |
Card failure No failure |
Alarm |
Green Off |
Card alarm No alarm |
GPS |
Q LED Off, A LED Off Q LED Green, A LED Green Q LED Green, A LED Off Q LED Red, A LED Off |
Disabled Enabled, qualified, and active Enabled, qualified, and not active Enabled and not qualified |
Holdover |
Off Red |
Tracking at least one input Tracking no inputs |
Active |
Green Off |
Card is active Card is in standby mode |
PRS |
Q LED Off, A LED Off Q LED Green, A LED Green Q LED Green, A LED Off Q LED Red, A LED Off |
Disabled Enabled, qualified, and active Enabled, qualified, and not active Enabled and not qualified |
Input 1 |
Q LED Off, A LED Off Q LED Green, A LED Green Q LED Green, A LED Off Q LED Red, A LED Off |
Disabled Enabled, qualified, and active Enabled, qualified, and not active Enabled and not qualified |
Input 2 |
Q LED Off, A LED Off Q LED Green, A LED Green Q LED Green, A LED Off Q LED Red, A LED Off |
Disabled Enabled, qualified, and active Enabled, qualified, and not active Enabled and not qualified |