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Pancake nurse call button for limited mobility patients A nurse call button on a pillow speaker with TV controls This hospital bed has a nurse call button on its rails. A nurse call button is a button or cord found in hospitals and nursing homes, at places where patients are at their most vulnerable, such as beside their bed and in the bathroom. [1]
By connecting a test telephone set, a technician calls the local telephone number of the automatic number announcement service. This call is connected to equipment at the central office that uses automatic equipment to announce the telephone number of the line calling in. The main purpose of this system is to allow telephone company technicians ...
Direct-distance dialing (DDD) was first introduced in areas with common-control switching (panel and crossbar) in the 1950s.These areas had used 411 for directory assistance, and because of the ability of common-control switching to analyze the initial digits of a number in a "sender" before routing the call, these areas did not require the dialing of an initial 1 to initiate a long-distance call.
The service charge may be charged per call, per minute, or a combination of the two. Originally, the per-call part could range from 5p to £16, and applies as soon as the call is answered, and the per-minute part could range from 1p to £8, and may apply either from the start of the call or after the first full minute.
In Bell System telephone exchanges, particularly the 5XB switches, information from the marker told the sender that the call required ANI, and stored the calling equipment number in reed relay packs in the sender. The sender used the transverter connector (TVC) to seize a transverter (TV), which was a bay of a few hundred flat spring relays ...
A telephone directory, commonly called a telephone book, telephone address book, phonebook, or the white and yellow pages, is a listing of telephone subscribers in a geographical area or subscribers to services provided by the organization that publishes the directory. Its purpose is to allow the telephone number of a subscriber identified by ...
A third number call or third party call is an operator assisted telephone call that can be billed to the party other than the calling and called party. The operator calls the third number for the party to accept the charges before the call can proceed. Time and charges was a service that could be requested of an operator before a call began ...
A call bell placed on a countertop. Principle of operation of a countertop call bell. A call bell is a bell used to summon an attendant or give an alarm or notice. [1] The bell alerts and calls the attention of the attendant who hears it. They are sometimes called service bell, reception bell, or concierge bell.