Understanding Key Service Unit for your Business Telephone System
The term of this business telephone system originated from the bell system. This is to describe a manually operated switch like line-buttons on the phone for instance that is related with the system. This kind of phone system allows users to access or answer one or more central office lines from one or more telephones.
The term of this business telephone system originated from the bell system. This is to describe a manually operated switch like line-buttons on the phone for instance that is related with the system. This kind of phone system allows users to access or answer one or more central office lines from one or more telephones. It also enables the users to place a call on hold in order to respond to another incoming call. This kind of system basically includes an intercom capability which allows a user to communicate other users on the phones connected in the system.
Different Architectural Designs of KSU
This business telephone system is designed principally to three architectures; the electromechanical shared-control key systems, the electronic shared-control systems, and the independent keysets. An electromechanical shared-control key system is the oldest; being marketed in late 1950ís and continued until 1980ís. It was intently designed for air traffic control communications allowing the control tower and the radar approach control or ground control approach. On the contrary, electronic shared-control key system is the modern architecture that followed the electromechanical shared-control key system. The wiring and cables were simplified and some features were added like;
∑†††††††† Answering Machine Functions
∑†††††††† Supervision of the Entire System via Remote
∑†††††††† Automatic Call Accounting
∑†††††††† Speed Dialling
∑†††††††† Caller ID
∑†††††††† Specific Limitations for Stations (e.g. no long-distance access, no paging, etc.)
∑†††††††† Signalling Sounds Selections
This design was the inspiration for the birth of the hybrid phone system as another classification of business telephone systems. Another design of KSU is the independent keysets which has the similar features of the previous designs yet it does not require any single shared control unit any longer.
Functional Parts of KSU
This business telephone system has main functional parts and they are the central service unit, the station cabling, the multi-button telephone sets or the key telephones, and the power supply. The central service unit, which is also called as the KSU itself, serves as a boundary and switching centre between incoming lines and system telephones. The station cabling connects each telephone to the central service unit. The multi-button telephone sets or the key telephones provide access to the central office lines, intercom, and special features. Lastly, the power supply converts the electrical power to the specifications required by the business telephone system.
There is also another variation of KSU that functions different. This is the KSU-less system which generally offers similar functionality and features without the expensive and specialized technology of the basic KSU system. This makes this business telephone system a little cheap and simple to set-up.
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