Stamp: Cordless Switchboard and Operators (Tanzania 1976)
Cordless Switchboard and Operators (Tanzania 1976)
15 April (Tanzania ) within release Telecommunications Development in East Africa goes into circulation Stamp Cordless Switchboard and Operators face value 1 Tanzanian shilling
| Stamp Cordless Switchboard and Operators in catalogues | |
|---|---|
| Michel: | Mi:TZ 55B |
Stamp is square format.
Stamp from souvenir sheet, perforation imprintedAlso in the issue Telecommunications Development in East Africa:
- Stamp - Microwave Tower face value 50;
- Stamp - Microwave Tower face value 50;
- Stamp - Chordless Switchboard and Operators face value 1;
- Stamp - Cordless Switchboard and Operators face value 1;
- Stamp - Telephones of 1880, 1936 and 1976 face value 2;
- Stamp - Telephones of 1880, 1936 and 1976 face value 2;
- Stamp - Message Switching Centre face value 3;
- Stamp - Message Switching Centre face value 3;
- Souvenir Sheet - Telecommunications Development in East Africa face value 6.50;
Stamp Cordless Switchboard and Operators it reflects the thematic directions:
Telecommunication, often used in its plural form or abbreviated as telecom, is the transmission of information with an immediacy comparable to face-to-face communication. As such, slow communications technologies like postal mail and pneumatic tubes are excluded from the definition. Many transmission media have been used for telecommunications throughout history, from smoke signals, beacons, semaphore telegraphs, signal flags, and optical heliographs to wires and empty space made to carry electromagnetic signals. These paths of transmission may be divided into communication channels for multiplexing, allowing for a single medium to transmit several concurrent communication sessions. Several methods of long-distance communication before the modern era used sounds like coded drumbeats, the blowing of horns, and whistles. Long-distance technologies invented during the 20th and 21st centuries generally use electric power, and include the telegraph, telephone, television, and radio.
Telephony (/təˈlɛfəni/ tə-LEF-ə-nee) is the field of technology involving the development, application, and deployment of telecommunication services for the purpose of electronic transmission of voice, fax, or data, between distant parties. The history of telephony is intimately linked to the invention and development of the telephone.
