15-19
Cisco ONS 15454 Procedure Guide, R5.0
December 2004
Chapter 15 Maintain the Node
NTP-A223 View the ONS 15454 Timing Report
Table 15-2 ONS 15454 Timing Report
Item Description Option Option Description
Clock Indicates the
timing clock.
The report
section that
follows applies
to the timing
clock indicated.
NE The node timing clock.
BITS-1 Out The BITS-1 Out timing clock.
BITS-2 Out The BITS-2 Out timing clock.
Status Indicates the
status of the
timing clock.
INIT_STATE The timing reference has not been provisioned. For an
NE reference, this status appears just before the first
provisioning messages when the TCC2/TCC2P is
booting. Timing is provisioned to the internal clock of
the node.
HOLDOVER_STATE 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 normal state combined with the node’s internal
clock. The node holds onto this frequency until the valid
reference is restored. This status appears for NE
references only.
FREERUN_STATE The node is running off 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. This status
appears for NE references only.
NO_SYNC_STATE A synchronization timing reference is not defined.
BITS-1 Out or BITS-2 Out default to this status until an
OC-N card is defined as its reference on the
Provisioning > Timing tab. This status appears for
external references only.
NE_SYNCH_STATE BITS-1 Out and BITS-2 Out use the same timing source
as the NE. This is displayed when NE Reference is
selected for BITS-1 Out and 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 it
achieves this goal, the node progresses to the normal
state.
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