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Telephone magneto. A telephone magneto is a hand-cranked electrical generator that uses permanent magnets to produce alternating current from a rotating armature. In early telegraphy, magnetos were used to power instruments, while in telephony they were used to generate electrical current to drive electromechanical ringers in telephone sets and ...
E.164 is an international standard ( ITU-T Recommendation), titled The international public telecommunication numbering plan, that defines a numbering plan for the worldwide public switched telephone network (PSTN) and some other data networks . E.164 defines a general format for international telephone numbers.
The short film "Telephone Memories (Reel 2 of 2) (1931)" is available for free viewing and download at the Internet Archive. The short film "Far Speaking (ca. 1935)" is available for free viewing and download at the Internet Archive. "US 174,465". pdfpiw.uspto.gov. – Telegraphy (Bell's first telephone patent) – Alexander Graham Bell
5. GreatPeopleSearch. GreatPeopleSearch is a user-friendly free reverse phone number lookup site that provides searchers with fast and accurate results. It draws on publicly available national ...
Belgian telephone numbers consist of three parts: First '0', secondly the "zone prefix" ( A) which has one or two digits for landlines and three digits for mobile phones, and thirdly the "subscriber's number" ( B ). Land lines always have nine digits. They are prefixed by a zero, followed by the zone prefix.
Special information tone. In telephony, a special information tone ( SIT) is an in-band international standard call progress tone consisting of three rising tones indicating a call has failed. It usually precedes a recorded announcement describing the problem. [1] [2]
Field telephones are telephones used for military communications. They can draw power from their own battery, from a telephone exchange (via a central battery known as CB), or from an external power source. Some need no battery, being sound-powered telephones . Telephone linesmen ford Lunga River during the Guadalcanal Campaign of World War II.
Area codes for mobile numbers begin with 6, corporate or state institution numbers with 7, toll-free, reverse-charge and shared-cost numbers with 8, and premium-rate numbers with 9. Network services numbers begin with "1", dialed without a prefix. This includes numbers beginning with "11", reserved for emergency and special services, such as: