Telephone Systems

Telephone Systems

Telephone Systems

Telephone system can range from small key systems to large scale private branch exchanges. A business telephone system differs from simply using a telephone with multiple lines in that the lines used are accessible from multiple telephones, or “stations” in the system, and that such a system often provides additional features related to call handling.

Business telephone systems are often broadly classified into “key systems”, “hybrid systems”, and “private branch exchanges”. A key system was originally distinguished from a private branch exchange (PBX) in that it allowed the station user to see and control the calls directly, manually, using line buttons, while a private branch exchange operated in a manner similar to the public telephone system, in that the calls were routed to the correct destination by being dialed directly.