If a manager has a number on both thier phone and their admin's phone, is there a way to have the manager's line ring on his phone first, and then ring on his admin's phone when they don't answer? And then could it roll to the manager's Unity voicema...

If a manager has a number on both thier phone and their admin's phone, is there a way to have the manager's line ring on his phone first, and then ring on his admin's phone when they don't answer?