"Time Sync" Function In Video Management Software

How can we implement "Time synchronization" function to set date & time of Video Management Software in all IP cameras?

Can anyone suggest?

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** ****,

***** *** *** **** ***********.

**** **** & **** ** *** *** ******* & *** with * *** ****** ** **** ****, *** ** **** give **** **** **** ******* *** ********* (*.*. ** ** 100) **** *** ******** ** **** ***** ** *** *** NTP ****** ************* ** *** ****** ************.

** ** ** ******** **** *** ******** *** ****** *** date & **** ******* ** *** ****** ******** ** ****? Using **** *** ** *** **** **** *** **** & time ** *** ****** & *** ********. * ** ******* for **** ******.

******* *** **** *** ******** ** *** ******* ** ******* managed ** *** *** ** * ******** *******. **** ** a ******* ** ***** ** ** *******.

*** ******* ********* *** ** **** **** *** ****** **** is ******** ***** ******* * ****** *******.

***** *** *** *** *****?

******* *** ******** ** **** *** ****** ****** ** **** of *** ************ **** ********* ** ** ****** ************. ****** systems **** * ********** ******* **** *** **** *** ******* out ** *** ** **** ******* ** *** **** ****** press.

** *** ******* *** **** **** *** **** **** ********, if *** **** ****** ** *** ***, *** *** ***** a *** ******* ******, ***** **** *** ******* ** **** out *** ********* ******* ** *** ******* ** *** ****.

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** *** *** **** & **** ******* ** ****** **** VMS, *** ***** ** *** ******* *** ******** ***** ****? Can ** ** *** **** **** ****** ** ***** ** ONVIF ** ***?

***** ***?