enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. EDACS - Wikipedia

    en.wikipedia.org/wiki/EDACS

    The first digital voice mode developed for EDACS was GE's Voice Guard, utilizing sub-band coding for its datastream at a rate of 9600 bps. Voice quality was not great, however, with it quickly being replaced by AEGIS. AEGIS was the second generation EDACS digital voice mode, made once again by GE, with Adaptive Multiband Encoding as its coding ...

  3. Ericsson Radio Systems - Wikipedia

    en.wikipedia.org/wiki/Ericsson_Radio_Systems

    Ericsson Radio Systems AB was the name of a wholly owned subsidiary in the Ericsson sphere, founded on 1 January 1983 by buying out all former owners of Svenska Radioaktiebolaget (SRA). The company was well known in Scandinavia and elsewhere in the 1980s, as it was deploying NMT systems and developing a line of mobile telephones under the brand ...

  4. Morris Beitman - Wikipedia

    en.wikipedia.org/wiki/Morris_Beitman

    Interest in Morris Beitman's "Most Often Needed Radio Diagrams" resurfaced in the early 1980s with the rise of restoring antique and collectible radios made before the 1940s. Vintage Radio, founded by Morgan E. McMahon, was a publishing company specializing in preserving early radio and television technology. [ 8 ]

  5. Telephone exchange - Wikipedia

    en.wikipedia.org/wiki/Telephone_exchange

    With manual service, the customer lifts the receiver off-hook and asks the operator to connect the call to a requested number. Provided that the number is in the same central office, and located on the operator's switchboard, the operator connects the call by plugging the ringing cord into the jack corresponding to the called customer's line.

  6. List of telephone switches - Wikipedia

    en.wikipedia.org/wiki/List_of_telephone_switches

    HS 25 (modified from the Ericsson OL-100 system with double relays and 25-point selector (Ericsson license), mainly used for small villages and towns in the counties) HS 31 (new developed register system, introduced in 1931, based on a new flat type relay and a 100-point two-motion selector, suitable for small and large exchanges)

  7. Trunked radio system - Wikipedia

    en.wikipedia.org/wiki/Trunked_radio_system

    A trunked radio system is an advanced alternative in which the channel selection process is done automatically, so as to avoid channel conflicts and maintain frequency efficiency across multiple talkgroups. This process is handled by what is essentially a central radio traffic controller, a function automatically handled by a computer system.

  8. Base station - Wikipedia

    en.wikipedia.org/wiki/Radio_base_station

    In radio communications, a base station is a wireless communications station installed at a fixed location and used to communicate as part of one of the following: a push-to-talk two-way radio system, or; a wireless telephone system such as cellular CDMA or GSM cell site. Terrestrial Trunked Radio

  9. Rotary dial - Wikipedia

    en.wikipedia.org/wiki/Rotary_dial

    [citation needed] While used in telephone systems of the independent telephone companies, rotary dial service in the Bell System in the United States was not common until the early 1920s. [ 1 ] From the 1960s onward, the rotary dial was gradually supplanted by push-button telephones , first introduced to the public at the 1962 World's Fair ...