Customer wants to add flash voice mail to delete tele marketers call, 20 to 25 each day.

During the day A.A. message dial 0, 0 to hunt group to ring several, phones.
After hours i guess they could dial 1 go to ext 100 with a greeting to leave a message.
Employees are not assigned to any certain extt . Store manager would use ext 100. hey need this as simple as can be. They are amish with mostly amish customers.
any other options let me know.
thanks gary s.

Gary Stevens