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Upgrade WS6500 Version 2.x.x to Version 2.1.1
1. Unzip ws6500 v2.1.1.zip
2. Procedure: 
   http://xxx.xxx.xxx.xxx:10087
    login user: xxxx
    login password: xxxx
    Upgrade the software (Control > Upgrade)
	-file name: sippd.bin
	-file name: osamdin.bin
	-file name: wwwroot.bin
	
    Click "Upload" button: 
	Display:
	sippd.bin---->Successfully
	osadmin.bin---->Successfully
	wwwroot.bin---->Successfully
	
3. Upgrade License key:(Configuration > System > License)
   -- Export: Backup the old License key first
   -- Import: Import the "license.ini" to your WS6500 and execute soft reset to take effect.
		
4. Click "Control > System > Restart" WS6500