The Private Office, a Westchester County provider of shared-office facilities, is offering new clients supplementary office space with a deluxe electronic package. The package includes a system integrated with a company's main phone lines and email domain so the location of business center occupants is indistinguishable from the client's main headquarters. Recently installed fiber optics now enable I.T. support for complex electronic infrastructures including full integration of the client's security devices. Offices at the 800 Westchester Ave. location are ready to go from day one. Tags: