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  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. Signal strength and readability report - Wikipedia

    en.wikipedia.org/wiki/Signal_strength_and...

    A signal strength and readability report is a standardized format for reporting the strength of the radio signal and the readability (quality) of the radiotelephone (voice) or radiotelegraph (Morse code) signal transmitted by another station as received at the reporting station's location and by their radio station equipment. These report ...

  5. Factory service manual - Wikipedia

    en.wikipedia.org/wiki/Factory_service_manual

    Manufacturers have a team of technical engineers, writers and illustrators who compile information for these service manuals. Some companies create aftermarket repair manuals for the general public to purchase such as Clymer Haynes [1] and Triple M FZCO. [2] These manuals are also generally available as online auto repair manuals.

  6. Telephone magneto - Wikipedia

    en.wikipedia.org/wiki/Telephone_magneto

    Many early manual telephones had an attached hand-cranked magneto that produced an alternating current (AC) at 50–100 V for signaling to ring the bells of other telephones on the same (party) line, and to alert an operator at the local telephone exchange. These were most common on long rural lines served by small manual exchanges which did ...

  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. 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)

  9. User guide - Wikipedia

    en.wikipedia.org/wiki/User_guide

    User's guide for a Dulcitone keyboard. A user guide, also commonly known as a user manual, is intended to assist users in using a particular product, service or application. It is usually written by a technician, product developer, or a company's customer service staff. Most user guides contain both a written guide and associated images.