Toshiba Phone System Voicemail Not Working

My particular issue had to do with Call Forwarding I had put in place in the past that wasn't completely reset. Inputting:

• #620

Completely resets all Call Forwarding settings so that voice mail was set back to normal and picks up after the default 3(1/4) rings. 

Problem: Phone rings and does not go to voice mail. (For internal and external phone calls)