Televes OLT 769401, Руководство пользователя

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Descripción del producto
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Reversibility Time
Time, measured in seconds, after which, the fault condition disappears. After this time, the invalid
source will be reconsidered for synchronization. This time is considered after the Wait-To-Restore time
has elapsed
Holdover Message
Delay
Time, in milliseconds, considered in the case where the equipment is in Holdover mode. This state is due
to a fault condition in the selected synchronization source and when there is no other available source.
QL (Quality Level) will be in QL_SEC when the delay is between 300ms and 2000ms (corresponding to
the range of values for this parameter);
Switching Message
Delay
Delay, in milliseconds, applicable in the case where changing to another synchronization source is
carried out with a different Quality Level value. This delay sets the elapsed time between the trigger of
the new synchronization source and a change in the output Quality Level. The range of values for the
Switching Message Delay is between 180ms and 500ms
Minimum Quality
Before Squelch
Minimum quality value; The equipment will squelch the synchronization source if there is no other
source with a quality level equal to or better than the selected source;
Send Value after
Quality Unknown
Value to be sent if Quality Unknown; The equipment will make the SSM output with the respective
Quality Level configured if there is no synchronization source with a Quality Level other than Quality
Unknown. The quality level SSM is selected from a combo box, Error: No se encuentra la fuente de
referencia. The meaning of each selectable message is described in table Table 5-.
Free-run Source
Free-run Source; With this option selected, the system always synchronizes with its internal clock (array
unit PLL).
Table 5-12: Synchronism Configuration parameters table
Figure 5-27: Synchronism Status Message Combo Box
SSM Description
PRC-G.811
The synchronization source is a PRC clock, according to G.811 recommendation
SSU-A
The synchronization source is an SSU clock (Synchronization Supply Unit), type I or
IV, according to G.812 recommendation.
SSU-B
The synchronization source is an SSU clock (Synchronization Supply Unit), type VI,
according to G.812 recommendation
SEC
The synchronization source is a SEC clock, according to G.813, Option I
recommendation.
DNU
The source should not be used for synchronization.
Table 5-13: Synchronization Status Message from the synchronization sources