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2. 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.

3. 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.

4. Ringer equivalence number - Wikipedia

   en.wikipedia.org/wiki/Ringer_equivalence_number

   The ringer equivalence number (REN) is a telecommunications measure that represents the electrical loading effect of a telephone ringer on a telephone line.In the United States, ringer equivalence was first defined by U.S. Code of Federal Regulations, Title 47, Part 68, based on the load that a standard Bell System model 500 telephone represented, and was later determined in accordance with ...

5. Public switched telephone network - Wikipedia

   en.wikipedia.org/wiki/Public_switched_telephone...

   The public switched telephone network ( PSTN) is the aggregate of the world's telephone networks that are operated by national, regional, or local telephony operators. It provides infrastructure and services for public telephony. The PSTN consists of telephone lines, fiber-optic cables, microwave transmission links, cellular networks ...

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

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

   In most cases, those QR codes still connect to some form of data to make them work, so even when boarding public transit, a user might be giving the transit agency that data. Sarah Kaufman from ...

7. Digital Access Signalling System 2 - Wikipedia

   en.wikipedia.org/wiki/Digital_Access_Signalling...

   DASS2 (Digital Access Signalling System) is a BT-designed signalling standard, and was introduced before the Q.931 standard was finalised by the international community. British Telecom used the term ISDN when describing their DASS2 lines. DASS2 lines are provided to customers on a 2 Mbit/s link and can handle 30 simultaneous calls (64 kbit/s ...