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2. Redcare - Wikipedia

   en.wikipedia.org/wiki/RedCARE

   Redcare Classic works below the voice frequency spectrum on a phone line in order to avoid interference with calls or broadband, which uses frequencies above the voice spectrum. Other versions also use GSM (mobile) as a backup to the main phone line or can function using either wireless ( 2G / 3G mobile data) or IP as the primary connection all ...

3. Digital access carrier system - Wikipedia

   en.wikipedia.org/wiki/Digital_Access_Carrier_System

   Digital access carrier system. (Redirected from Digital Access Carrier System) Digital access carrier system (DACS) is the name used by British Telecom ( BT Group plc) in the United Kingdom for a 0+2 pair gain system. Two Telspec DACS remote units mounted on a pole.

4. Line card - Wikipedia

   en.wikipedia.org/wiki/Line_card

   Telephone line cards perform multiple tasks, such as analog-to-digital and digital-to-analog conversion of voice, off-hook detection, ring supervision, line integrity tests, and other BORSCHT functions. In some telephone exchange designs, the line cards generate ringing current and decode DTMF signals. The line card in a subscriber loop carrier ...

5. Digital subscriber line - Wikipedia

   en.wikipedia.org/wiki/Digital_subscriber_line

   Digital subscriber line ( DSL; originally digital subscriber loop) is a family of technologies that are used to transmit digital data over telephone lines. [1] In telecommunications marketing, the term DSL is widely understood to mean asymmetric digital subscriber line (ADSL), the most commonly installed DSL technology, for Internet access .

6. QR Codes Are Reshaping Public Transit, But Are They Safe? - AOL

   www.aol.com/qr-codes-reshaping-public-transit...

   October marks the 70th anniversary of the first bar code-type product. And the QR code — short for quick response — is an evolution on bar codes that are often used to point users to a ...

7. 1-5-7-1 - Wikipedia

   en.wikipedia.org/wiki/1-5-7-1

   1-5-7-1. 1-5-7-1 is the name of a family of calling features in the United Kingdom, for residential and business telephone lines and for mobile telephones, that are provided by BT Group and several other telephone service providers. The family is named after the telephone number 1571, the special service number that is used to access it.