Voice end point maintenance work
Tuesday March 15th through Sunday March 20th between the hours of 3:00AM and 6:00AM, ITS/TNS will perform maintenance work on voice end points. As part of this scheduled work, voice end points will reset causing a momentarily delay with inbound and outbound calls.
CHG0035802
More information: Voice end point maintenance work
Story added 14. March 2016, content source with full text you can find at link above.