Sets the service grade of the ring receiving mode for each station. Service grades are divided into 30 grades ([01]-[30]) as specified in the ¡®4.7.2 COS Contents¡¯.
1) Select the 4.Group & Talbe => 4.7 Class of Service => 4.7.1 Port Class from the Tree Viewer.
2) View the current ring receiving mode for each station.
3) Enter the service grade ([01]-[30]) for each station when its ring receiving mode is 1 to 6.
4) Save the changes.