A telephone hook or switchhook indicates when the phone is hung up, It is an electrical switch that often has a lever or magnetic button in the cradle where the handset is hung up when the call ends.
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what does a telephone receptionist answer when the person is not in
It's a telephone switchboard
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A telephone number or extension that is dedicated to a particular business function of an organization. eg the sales department; the accounts department.
In order to used this networks in conjunction with other apparatus in telephone system they must be provide efficient transmission !
A cellular telephone within a cell communicates to the call tower, which in turn is connected to the cellular telephone switching office (CTSO) by the telephone line. The telephone switching Office is then connected to the local telephone system. If the cellular telephone moves from one cell to another, the cellular telephone switching office then hands the connection from one cell to another.
So that you could talk to people even if you we're no where near someone else
what a function of a reservation,front desk,telephone operator,cashier,bellmen,doorman,concierge,night audit,guest relation,business center.
Some of the functions of the telephone are the following: call transfer, conference call, call on hold, call to either local, international,mobile or emergency phone numbers.