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No.20S046-00
46/62
FS-C4KU7DGES-F / FS-C4KU7DGES-M42 / FS-C2KU7DGES-F / FS-C2KU7DGES-M42 / FS-C2KU7DGES-C
Product Specifications and Use’s Guide
10.18 IEEE1588
Precision Time Protocol (PTP) is implemented on camera, is synchronized to “Master Clock” in same network
automatically.
The camera supports IEEE 1588-2008 of PTP Version 2. The accuracy of time (Timestamp) synchronized is
different based on network system configuration.
1)
BMC (Best Master Clock) function
BMC function is implemented on camera. The most accurate clock in same network is defined as “Master
Clock” then time (Timestamp) synchronizes. If there are more than two devices has most accurate clock in
same network, clock of smallest MAC address device is defined as “Master Clock”.
2)
E2E (End-to-End) Transparent Clock
The camera supports E2E method. Time difference is correcting by blow algorithm
Master
Sync message
Slave
Flow up message
Timestamp
Timestamp
Timestamp
Delay request
message
Timestamp
“
Delay request
”
reply message
Switching HUB
Time
The master device and slave device exchange message included Timestamp.
Defined delay between master device and slave device by comparing these messages.
If time difference between master device and slave device is occurred, adjust internal clock of slave device
to synchronize to master device.
Synchronize clock regularly to correcting time drift.