QL Mode

The clock selection.

• Disabled: The clock is selected based on the priority assigned.
• Enabled: The clock is selected based on its quality and priority.

Disabled

• Enabled
• Disabled

Output QL Mode

Quality of the clock output.

• Auto: The output clock is the same as the source clock that is locked, provided QL Mode is enabled.
• Manual: Quality of output clock can be set manually.

When QL Mode is set as Disabled, Output QL mode should be selected as Manual.

Manual

• Auto
• Manual

Reversion Mode

Clock switch mode in case of failure.

• Auto: The switching of the clock happens automatically.
• Manual: The switching of the clock has to be selected manually.

Manual

• Auto
• Manual

WTRTime (minutes)

The time the clock takes to switch to previously locked clock when it is restored from failure. Changes made to the WTR will not impact clocks that are already in WTR. The changes to the clocks will be applied on the next switch.

NOTE: WTRTime is applicable only when Reversion Mode is set to Auto.

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Node output quality level

Allows you to select the node output quality level.

PRC

• PRC
• SSU_A
• SSU_B
• SEC
• DNU
• INVALID

Node minimum quality level

The minimum quality level expected by the node to lock to a particular clock. If the clock does not have the QL as expected, then the BITS clock output will be squelched. Squelching is not done at the STM-N interfaces.

SEC

• PRC
• SSU_A
• SSU_B
• SEC
• DNU
• INVALID

Output quality level

Displays the actual output quality of clock at current state.

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SETG Status

Displays the status of the PLL within the node synchronization module. Any one of the following modes will be displayed:

• Freerun: In freerun mode, the system clock is not locked to a timing reference and runs at internal frequency.
• Locked: In locked mode, the system clock is locked to a timing reference.
• Holdover: The node enters holdover mode automatically if the target mode is locked but all timing references have become unavailable. When a timing reference becomes available again, the synchronization hardware automatically transitions to locked mode. The synchronization hardware remains in holdover mode for a minimum of 24 hours.

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Selected Clock Source

Displays the nomination of a clock reference to the node which is defined by the following parameters:

• Port
• BITS
• Internal

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External Request on Selected source

Displays the external requests given on the clock source. Any one of the following external requests will be displayed.

• Forced Switch
• Manual Switch
• Lockout Source
• No Request (When any of the
• above external requests is not
• given on the clock source)

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