Cisco Cisco IPCC Web Option Technical References
15
3. VRU Time Synchronization
Interface
The VRU can use the Time Synchonization Interface (TSI) to synchronize
its internal clock with VRU PG clock, which is synchronized to the
Unified ICM clock. As certain messages arrive from the VRU, the VRU
PG compares VRU time stamp with Unified ICM time. Significant
differences are periodically reported to the VRU via the TSI.
its internal clock with VRU PG clock, which is synchronized to the
Unified ICM clock. As certain messages arrive from the VRU, the VRU
PG compares VRU time stamp with Unified ICM time. Significant
differences are periodically reported to the VRU via the TSI.
The messages that contain the current VRU time:
SCI:
INIT_SERVICE_CONTROL_VRU, VRU_STATUS
EDF: INIT_DATA_END_EVENT, VRU_STATUS_EVENT
Warning: The Time Synchronization Interface should not be used on any
VRU which is connected to a PG and is being used as Unified ICM Time
Source (Router registry key "Router \ CurrentVersion \ Configuration \
Time \ Source"). This can cause a time feedback loop that can result in
system time to fluctuate.
VRU which is connected to a PG and is being used as Unified ICM Time
Source (Router registry key "Router \ CurrentVersion \ Configuration \
Time \ Source"). This can cause a time feedback loop that can result in
system time to fluctuate.