radio telephone system
111China Radio International — Radio Beijing redirects here. For the municipal radio station (Radio Beijing Corporation), see Beijing Renmin Guangbo Diantai. China Radio International City of license Beijing Broadcast area Worldwide First air date December 3, 1941 …
112Television and Radio — ▪ 1995 Introduction Dominant trends in television and radio in 1994 included continuing globalization of services and programming and increased competition between cable and telephone companies. The industry s battle cry was expand or exit …
113Antenna (radio) — Whip antenna on car …
114Two-way radio — receiver which only receives content. Two way radios are available in mobile, stationary base and hand held portable configurations. Hand held radios are often called walkie talkies or handie talkies. A push to talk or Press To Transmit button is …
115Trunked radio system — or other entity.In 1997, radio scanners compatible with trunked systems appeared on the market. One of the first companies to bring these devices to market, Uniden, trademarked the term trunk tracking on December 5, 1997. [US Patent and Trademark …
116Mutual Broadcasting System — Type Cooperative radio network (1934–52); corporate controlled radio network (1952–99) …
117Amateur radio repeater — An amateur radio repeater is an electronic device that receives a weak or low level amateur radio signal and retransmits it at a higher level or higher power, so that the signal can cover longer distances without degradation. Many repeaters are… …
118Signalling System No. 7 — SS7 protocol suite OSI layer SS7 protocols Application INAP, MAP, IS 41... TCAP, CAP, ISUP, ... Network MTP Level 3 + SCCP Data link MTP Level 2 …
119Crystal radio — Crystal set redirects here. For the Australian rock band, see The Crystal Set. A modern reproduction of an antique crystal set. It is tuned to different stations by moving the sliding contact (right) up and down the tuning coil (red). The device… …
120Mobile telephone numbering in India — Country Code: +91 International Call Prefix: 00 Trunk Prefix: 0 Contents 1 Zones 2 Prefixes and number formats 3 Mobile Numbers, Operator and Circle 4 …
