This would actually require 4 ring plans. The basic concept is this:
Ring Plan 1 - Both Location A & B Closed
Ring Plan 2 - Location A Open/Location B Closed
Ring Plan 3 - Location A Open/Location B Open
Ring Plan 4 - Location A Closed/Location B Open

This will work with automatic scheduling regardless of the time difference unless you have locations that have differences in participation of Daylight Saving Time.

You also could put a different schedule in the voicemail for that one group but I like the Ring Plan solution better.

You could call if you want. I am a local dealer to Dallas and have been a Samsung Tech for 19 years.

Todd Tarkington
Communication Experts Group, Inc.
(972)444-8202