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2. Telephone jack and plug - Wikipedia

   en.wikipedia.org/wiki/Telephone_jack_and_plug

   telephone line to phone cord: The wall jack. This connection is the most standardized, and often regulated as the boundary between an individual's telephone and the telephone network. In many residences, though, the boundary between utility-owned and household-owned cabling is a network interface on an outside wall known as the demarcation ...

3. Telephone line - Wikipedia

   en.wikipedia.org/wiki/Telephone_line

   A telephone line or telephone circuit (or just line or circuit industrywide) is a single-user circuit on a telephone communication system. [1] It is designed to reproduce speech of a quality that is understandable. [ 2 ]

4. Lightning (connector) - Wikipedia

   en.wikipedia.org/wiki/Lightning_(connector)

   Lightning is a proprietary computer bus and power connector, created and designed by Apple Inc. It was introduced on September 12, 2012, in conjunction with the iPhone 5, to replace its predecessor, the 30-pin dock connector.

5. Switchboard operator - Wikipedia

   en.wikipedia.org/wiki/Switchboard_operator

   Switchboard technology was a physically demanding task, involving numerous plugs, keys, lights, connecting cords, and complicated protocols for establishing connections. The full-time operators were on duty 56 hours per week, and while they often grumbled about being overworked by a harsh boss, they were reasonably compensated at $50 a month.

6. Modular connector - Wikipedia

   en.wikipedia.org/wiki/Modular_connector

   The first types of small modular telephone connectors were created by AT&T in the mid-1960s for the plug-in handset and line cords of the Trimline telephone. [1] Driven by demand for multiple sets in residences with various lengths of cords, the Bell System introduced customer-connectable part kits and telephones, sold through PhoneCenter stores in the early 1970s. [2]

7. Mobile phone accessories - Wikipedia

   en.wikipedia.org/wiki/Mobile_phone_accessories

   Mobile phone chargers have gone through a diverse evolution that has included cradles, plug-in cords and obscure connectors. However, devices built between 2010 and 2020 generally use micro-USB connectors, while newer devices tend to use USB-C. Apple devices often use proprietary connectors.