How to configure Automatic and Manual Call waiting for receiving calls in panasonic ns300 epabx?

Receiving Call Waiting-

You can set call waiting for extention.

   *7311
    To Set/Cancel for Intercom Calls (Manual Call Waiting)

   Automatic Call Waiting "ON" for Extention Call

• Login your Web Maintenance Console
• Go to PBX Configuration
• Click on System
• Select System Option
• Go to Option 5
• Click on Enable

*7321
    To Set/Cancel for Outside Calls (Automatic Call Wailting)