Fios phone star codes for Do-Not-Disturb
Fios phone star codes for Do-Not-Disturb 
*78  ON
*79  OFF
When ON, all phone calls go to Voicemail.
The star codes listed on the web help page for the Do-Not-Disturb function are wrong!  It took me 45 minutes once I finally got a human Fios tech rep to give me the correct codes.  In total, this Fios screwup wasted three hours of my time!  It appears that some of the other star codes are also wrong.  What NOT to do: key in random star codes!