Stamp: Portable radio communication (Zaire 1984)
Portable radio communication (Zaire 1984)
14 May (Zaire ) within release World-year of telecommunications goes into circulation Stamp Portable radio communication face value 8.50 Zairean zaire
| Stamp Portable radio communication in catalogues | |
|---|---|
| Michel: | Mi:CD 848 |
| Belgium: | Bel:CD 1226 |
Stamp is horizontal format.
Also in the issue World-year of telecommunications:
- Stamp - Telephone face value 80;
- Stamp - Naval Navigation face value 10;
- Stamp - Satellite face value 15;
- Stamp - Portable radio communication face value 8.50;
- Stamp - Satellite face value 10;
- Stamp - Video face value 15;
- Stamp - Satellite face value 37.50;
Stamp Portable radio communication 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.
