Timing Statuses
The following table lists timing statuses that might appear on the timing report.
 
Status
Description
INIT_STATE
The timing reference has not been provisioned. For an NE reference, this status appears before the first provisioning messages when the TCC2/TCC2P is booting on the ONS 15454 SDH, or the TSC is booting on the ONS 15600 SDH. Timing is provisioned to the internal clock of the node.
HOLDOVER_STATE
(NE references only) The clock was locked onto a valid timing reference for more than 140 seconds when a failure occurred. Holdover state timing is a computation based on timing during the normal state combined with the node’s internal clock. The node holds onto this frequency until the valid reference is restored.
FREERUN_STATE
(NE references only) The node is running from its internal clock without any modification except the calibrated value to bring timing to 0 PPM. Freerun state can occur when a Force switch to the internal clock is initiated, all references fail without the 140 seconds of holdover data, or only internal timing references are defined.
NO_SYNC_STATE
(External references only) A synchronization timing reference is not defined. BITS-1 Out or BITS-2 Out default to this status until an appropriate card is defined as its reference on the Provisioning > Timing tab.
NE_SYNCH_STATE
BITS-1 Out and/or BITS-2 Out use the same timing source as the NE. This status appears when NE Reference is selected for the BITS-1 Out and/or BITS-2 Out Reference List on the Provisioning > Timing tab.
NORMAL_STATE
The timing reference is locked onto one of its provisioned references. The reference cannot be Internal or No Sync State.
FAST_START_STATE
The node has switched references, but the reference is too far away to reach normal state within an acceptable amount of time. Fast start is a fast acquisition mode to allow the node to quickly acquire the reference. After the node acquires the reference, it progresses to the normal state.
FAST_START_FAILED_STATE
A timing reference is too far away to reach during the normal state. The fast start state could not acquire sufficient timing information within the allotted amount of time.

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