Note:1.Do not cut off power during upgrade,otherwise upgrade fail
     2.Stop all recording before upgrade,manual,time,motion detection,alarm recording
Instructions for firmware upgrade for H.264:
1.Copy correct firmware to U disk root directly,without any folder,keep its original file name 
2.Insert U disk into USB interface in DVR rear panel
3.Click in DVR main menu as follows:
Main Menu--->Management Tools--->Upgrade--->select
	Target--->Mainboard
	Method--->USB
4.Click OK,wait upgrading untill 100% completely,it takes about 5 minutes,once completed,DVR will automatically reboot