Items and meanings:
Rule Name (a):  | Provide a name for the QoS rule (up to 15  | 
  | alphanumerical characters; e.g, "VoIP Phone")  | 
Bandwidth (b):  | Set the bandwidth amount of the QoS rule. You have  | 
  | to select the data direction of this rule (Upload or | 
  | Download), and the speed of bandwidth limitation  | 
  | in Kbps, then select the type of QoS: 'guarantee'  | 
  | (guaranteed usable bandwidth for this rule) or 'max'  | 
  | (set the maximum bandwidth for the application  | 
  | allowed by this rule).  | 
Local IP  | Specify the local (source) IP address  | 
Address (c):  | that will be affected by this rule. Enter the  | 
  | starting IP address in the left field, and input the  | 
  | end IP address in the right field to define a range of  | 
  | IP addresses, or just input the IP address in the left  | 
  | field to define a single IP address.  | 
Local Port  | Enter the range of local (source) port numbers  | 
Range (d):  | that should be affected by this rule. If you want to  | 
  | apply this rule on ports 80 to 90, enter   | 
  | want to apply this rule only to a single port, just  | 
  | input the port number, like '80'.  | 
Remote IP  | Specify the remote (destination) IP address  | 
Address: (e):  | that should be affected by this rule. Enter the  | 
  | starting IP address in the left field, and input the  | 
  | end IP address in the right field to define a range of  | 
  | IP addresses, or just input the IP address in the left  | 
  | field to define a single IP address.  |