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  2. Serving area interface - Wikipedia

    en.wikipedia.org/wiki/Serving_area_interface

    The SAI provides the termination of individual twisted pairs of a telephony local loop for onward connection back to the nearest telephone exchange (US: "central office" (CO)) or remote switch, or first to transmission equipment such as a subscriber loop carrier multiplexer and then to the exchange main distribution frame (MDF).

  3. 25-pair color code - Wikipedia

    en.wikipedia.org/wiki/25-pair_color_code

    When used for plain old telephone service (POTS), the first wire is known as the tip or A-leg (U.K.) conductor, and is usually connected to the positive side of a direct current (DC) circuit, while the second wire is known as the ring lead or B-leg (U.K.), and is connected to the negative side of the circuit. Neither of these two sides of the ...

  4. Network interface device - Wikipedia

    en.wikipedia.org/wiki/Network_interface_device

    The simplest NIDs are essentially just a specialized set of wiring terminals. These will typically take the form of a small, weather-proof box, mounted on the outside of the building. The telephone line from the telephone company will enter the NID and be connected to one side. The customer connects their wiring to the other side.

  5. Telephone jack and plug - Wikipedia

    en.wikipedia.org/wiki/Telephone_jack_and_plug

    This list covers only single-line telephone plugs commonly used in homes and other small installations; there are 44 different variations of plugs, including an Israeli version of BS6312 with different internal wiring of the pins, plus hard wiring to a junction box with no adapter. Special telephone sets use a variety of special plugs, for ...

  6. List of telephone switches - Wikipedia

    en.wikipedia.org/wiki/List_of_telephone_switches

    Bell Canada operated NE-1ESS 2 wire switches (some of which also provided Centrex services) in Toronto, Ottawa and Montreal. A 4W NE-1ESS was installed in Thunder Bay to provide telephone switching services (SAGE and AUTOVON)for USA and Canadian bases in that part of North America. The #1ESS was implemented using discrete diode transistor logic.

  7. AT&T to eliminate copper wire phone lines to most users. Who ...

    www.aol.com/t-eliminate-copper-wire-phone...

    AT&T plans to eliminate its traditional landline phone service across nearly all U.S. states in its service area by 2029, according to an official announcement. The telecom company has said its ...

  8. HomePNA - Wikipedia

    en.wikipedia.org/wiki/HomePNA

    The HomePNA Alliance (formerly the Home Phoneline Networking Alliance, also known as HPNA) is an incorporated non-profit industry association of companies that develops and standardizes technology for home networking over the existing coaxial cables and telephone wiring within homes, so new wires do not need to be installed.

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!