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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 ...
The test consists of calling a reverting calling telephone number (ringback number) or a vertical service code with a standard telephone. Upon answering the call, the exchange plays a unique signal tone as a signal for the installer to hangup the telephone. The exchange then places a reverting call to the originating line, causing the telephone ...
Amazon Echo Show is a smart speaker that is part of the Amazon Echo line of products. Similarly to other devices in the family, it is designed around Amazon's virtual assistant Alexa, but additionally features a touchscreen display that can be used to display visual information to accompany its responses, as well as play video and conduct video calls with other Echo Show users.
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Loop around, a primitive conference call bridge [3] Milliwatt test, a standardized 1004 Hz, zero dBm sinusoidal test tone used to measure line quality and transmission loss between stations. Ringback number, which causes the calling telephone to ring to verify an installation is working and the phone number routing properly.
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