DND Do not Disturb From a display phone

Temporarily turn ringing off on your phone but still be able to make calls.

In the softkeys press the down arrow, Program, DND, Set, and All. It will display DND All in the screen. 

To Cancel press the down arrow, Program, DND,  and CNCL.

To cancel repeat the process except you would press CNCL in place of Set.

 Rising Sun Technologies