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  2. Plain old telephone service - Wikipedia

    en.wikipedia.org/wiki/Plain_old_telephone_service

    Plain old telephone service (POTS), or publicly offered telephone service, [1] is a retronym for voice-grade telephone service that employs analog signal transmission over copper loops. The term POTS originally stood for post office telephone service , [ citation needed ] as early telephone lines in many regions were operated directly by local ...

  3. Automatic number announcement circuit - Wikipedia

    en.wikipedia.org/wiki/Automatic_number...

    The specifications define several test features for line conditions, such as quiet line and busy line, and test tones transmitted to callers. Telephone numbers are assigned for ring back to test the ringer when installing telephone sets, milliwatt tone (a number simply answers with a continuous test tone ) and a loop around (which connects a ...

  4. DSL filter - Wikipedia

    en.wikipedia.org/wiki/DSL_filter

    A DSL filter (also DSL splitter or microfilter) is an analog low-pass filter installed between analog devices (such as telephones or analog modems) and a plain old telephone service (POTS) line. The DSL filter prevents interference between such devices and a digital subscriber line (DSL) service connected to the same line. Without DSL filters ...

  5. Small Business Phone System: A Guide to Service Types ... - AOL

    www.aol.com/small-business-phone-system-guide...

    Learn about conventional and modern small business phone services, from technologies to equipment, to decide which solution is best for your company. Small Business Phone System: A Guide to ...

  6. Intercom - Wikipedia

    en.wikipedia.org/wiki/Intercom

    A single device can add intercom functionality to multiple standard telephones on a common phone line, even of different makes and models. Installation effort is minimal, and is not vulnerable to the radio interference and security issues of wireless systems. The Add-A-Com Whole House Intercom for Standard Telephone Systems is such a device.

  7. ISDN - Wikipedia

    en.wikipedia.org/wiki/ISDN

    That means an ISDN line can take care of what were expected to be most people's complete communications needs (apart from broadband Internet access and entertainment television) at a much higher transmission rate, without forcing the purchase of multiple analog phone lines.

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