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2. Trimline telephone - Wikipedia

   en.wikipedia.org/wiki/Trimline_telephone

   Early foreign made Trimline, December 1986. 90s Trimline phone made by Lucent/Philips and branded AT&T. The Trimline telephone is a series of telephones that was produced by Western Electric, the manufacturing unit of the Bell System. These telephones were first introduced in 1965 and are formally referred to as the No. 220 Hand Telephone Sets.

3. Tin can telephone - Wikipedia

   en.wikipedia.org/wiki/Tin_can_telephone

   Tin can telephone. A tin can phone is a type of acoustic (non-electrical) speech-transmitting device made up of two tin cans, paper cups or similarly shaped items attached to either end of a taut string or wire. It is a particular case of mechanical telephony, where sound (i.e., vibrations in the air) is converted into vibrations along a liquid ...

4. LTE (telecommunication) - Wikipedia

   en.wikipedia.org/wiki/LTE_(telecommunication)

   LTE stands for Long-Term Evolution and is a registered trademark owned by ETSI (European Telecommunications Standards Institute) for the wireless data communications technology and a development of the GSM/UMTS standards. However, other nations and companies do play an active role in the LTE project.

5. List of telephony terminology - Wikipedia

   en.wikipedia.org/wiki/List_of_telephony_terminology

   Call waiting - a system that notifies a caller of another incoming telephone call by sounding a sound in the earpiece. Called party - (or callee or B-party) Caller. Calling party. Conference call (multi-party call) COCOT.

6. History of the telephone - Wikipedia

   en.wikipedia.org/wiki/History_of_the_telephone

   The transmitter stood on a stand, known as a "candlestick" for its shape. When not in use, the receiver hung on a hook with a switch in it, known as a "switchhook." Previous telephones required the user to operate a separate switch to connect either the voice or the bell. With the new kind, the user was less likely to leave the phone "off the ...

7. Time-division multiplexing - Wikipedia

   en.wikipedia.org/wiki/Time-division_multiplexing

   Time-division multiplexing ( TDM) is a method of transmitting and receiving independent signals over a common signal path by means of synchronized switches at each end of the transmission line so that each signal appears on the line only a fraction of time in an alternating pattern. It can be used when the bit rate of the transmission medium ...