|Definition||:||Key Service Unit|
|Category||:||Technology » Communication|
What does KSU mean?
Key Service Unit (KSU) or Key System Unit, is the switching control unit for a Key Telephone System (KTS), which controls routing and operation of an analog telephone system. Key Telephone Systems are usually used by companies with fewer employees. A key system has telephones with multiple buttons (“keys”) and lights that indicate which lines are in use.
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