I need to acquire a sequential ring service, so that when phone number 'X' is called: A) External phone number A rings. If A does not answer, B) External phone number B rings. If B does not answer, C) External phone number C rings. If C does not answer, D) External phone number B rings. If D does not answer, E) External phone number E rings.
For reasons too byzantine to mention here, our current provider (with whom we are stuck) will not bestir themselves to provide it, so I'm looking to outsource this one function. Fortunately, we don't need to attach this to an internal number; an external number 'X' would work well.
Who have you worked with satisfactorily that could provide such service?