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  2. Lineman's handset - Wikipedia

    en.wikipedia.org/wiki/Lineman's_handset

    A lineman's handset typically connects via a pair of test leads, not the modular connector found on most consumer telephone equipment. The test leads will feature some combination of alligator clips (to connect to bare wires), a piercing spike or "bed-of-nails" (for insulated wires), and something designed to fit a punch block.

  3. CDMA mobile test set - Wikipedia

    en.wikipedia.org/wiki/CDMA_mobile_test_set

    A CDMA Mobile Test Set is a call simulating device that is used to test CDMA cell phones. It provides a network-like environment forming a platform to test the cell phone. This reduces cost of manufacturing and testing the cell phone in a real environment. It can be used to test all major 2G, 2.5G, 3G and 3.5G wireless technologies. In a lab ...

  4. Bell System Practices - Wikipedia

    en.wikipedia.org/wiki/Bell_System_Practices

    TEST EQUIPMENT: 102-000-000: Test Equipment, Electrical Indicating Instruments and Meters !Switching Systems and Pawed - Maintenance, Selection, and Use TEST EQUIPMENT: 103-000-000: Transmission Test Equipment TEST EQUIPMENT: 104-000-000: Radio Test Equipment TEST EQUIPMENT: 105-000-000: PBX and Station Test Equipment TEST EQUIPMENT: 106-000-000

  5. Telephone density - Wikipedia

    en.wikipedia.org/wiki/Telephone_Density

    Telephone density or teledensity is the number of telephone connections for every hundred individuals living within an area. It varies widely across the nations and also between urban and rural areas within a country. Telephone density has significant correlation with the per capita GDP of the area. [1]

  6. Network interface device - Wikipedia

    en.wikipedia.org/wiki/Network_interface_device

    This allows the company to test the line from the central telephone exchange, without the need to have test equipment at the customer site. The telephone company usually has the ability to remotely activate loopback, without even needing personnel at the customer site. When looped back, the customer equipment is disconnected from the line.

  7. Comparison of mobile phone standards - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_mobile_phone...

    Cellular network standards and generation timeline. This is a comparison of standards of wireless networking technologies for devices such as mobile phones.A new generation of cellular standards has appeared approximately every tenth year since 1G systems were introduced in 1979 and the early to mid-1980s.

  8. DMS-100 - Wikipedia

    en.wikipedia.org/wiki/DMS-100

    The DMS-100 is a member of the Digital Multiplex System (DMS) product line of telephone exchange switches manufactured by Northern Telecom. Designed during the 1970s and released in 1979, it can control 100,000 telephone lines. [1] The purpose of the DMS-100 Switch is to provide local service and connections to the PSTN public

  9. No. 4 Electronic Switching System - Wikipedia

    en.wikipedia.org/wiki/No._4_Electronic_Switching...

    Two-wire and 4-wire voice-frequency trunks terminating at metallic terminal facilities and equipment which provides an interface between digital carrier equipment and the 4ESS switching network. The switching network contains the equipment which actually switches pulse code modulated data from one trunk or service circuit to another.