My customer has 2 companies on a 7100. Wants to have an emergency mailbox for both companies that will message alert a person on call. then message alert a 2nd, 3rd and 4th person if the 1st person doesn't respond.

Here's the catch: They want to rotate who gets called 1st on a weekly basis. I could setup 4 ring plans and RP buttons on a phone?

Anyone have a better approach?
Thanks!