Key Service Unit. A small metal cabinet that contains all of the electronics of a business key telephone system. The KSU fits between the lines coming in from the central office and the lines going to the individual phones. The KSU should be in a well-ventilated location because it gets very hot. It should be near a power outlet that is dedicated to it (other devices such as computers, TVs, vacuum cleaners, etc. could affect it)
(Key Service Unit) - The control switch of a business phone system that provides features such as call transfer, call routing, intercom, conferencing, and others.
Key Service Unit. A small cabinet which contains all the switching electronics of a business key telephone system.
Key Service Unit. To include: Power Cord, Common Equipment (Circuit packs as configured and shipped by manufacturer), Power Supply, Door/Cover.
Key Service Unit. The main cabinet that holds all of the switching electronics of a business phone system. This is the link between you at your desk and the CO.
A multi-line/multi-extension telephone system that utilizes a central microprocessor to direct calls between telephones.
Key Service Unit. Main part of a key telephone system, containing the electronics controlling which line is directed to which phone; mounted in a closet or near the telephone company demarcation point.
Key service unit, this is the main box/cabinet that contains all of the equipment, memory, and switching technology to run a telephone system.
Key Service Unit. A Key Service Unit is the central operating unit of a key telephone system (KTS) or non-PBX/ACD telephone system (small customer premises telephone switch).
Key Service Unit - The main cabinet which contains all the electronics to run a Key Telephone System.
Key System Unit. Typically supports advanced business telephone features such as call forwarding, extension dialing, or voice mail options.
Key Service Unit A central control cabinet serving many multi-button key telephones. Contains equipment which enables the user to pick up and hold PABX or Central Office lines and provide flashing line, steady, busy and wink hold signals. Dial intercom service is also an option.
Key Service Unit. The main cabinet that holds the cards, or self-contained units. Most multi-line phones plug into a KSU. The KSU controls all the calls, which phones ring at certain times, and everything else your phone system does.