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2. Telephone jack and plug - Wikipedia

   en.wikipedia.org/wiki/Telephone_jack_and_plug

   A telephone jack and a telephone plug are electrical connectors for connecting a telephone set or other telecommunications apparatus to the telephone wiring inside a building, establishing a connection to a telephone network. The plug is inserted into its counterpart, the jack, which is commonly affixed to a wall or baseboard.

3. Telecommunications cable - Wikipedia

   en.wikipedia.org/wiki/Telecommunications_cable

   Telecommunications cable is a type of guided transmission medium. Telecommunications are based on transmitting and receiving modulated waves/signals through a medium. Types of telecommunications cable include: [1] [2] electrical cables when electric current is carried; transmission lines and waveguides when electromagnetic waves are transmitted ...

4. Telephone line - Wikipedia

   en.wikipedia.org/wiki/Telephone_line

   Cross section of telephone cable of 1,800 twisted pairs, 1922. A telephone line or telephone circuit (or just line or circuit industrywide) is a single-user circuit on a telephone communication system. It is designed to reproduce speech of a quality that is understandable. [1] It is the physical wire or other signaling medium connecting the ...

5. 25-pair color code - Wikipedia

   en.wikipedia.org/wiki/25-pair_color_code

   For example, a 900-pair cable has the first 600 pairs in 24 groups of 25 pairs in a white binder, and the remaining 300 pairs in 12 groups of 25 pairs wrapped in a red binder. Some cables are "mirrored" or "clocked" with a pattern that is known throughout the telephone industry.

6. Spectrum (brand) - Wikipedia

   en.wikipedia.org/wiki/Spectrum_(brand)

   Spectrum is the trade name of Charter Communications, which is widely used by market consumers and commercial cable television channels, internet, telephone, and wireless service providers. The brand was first introduced in 2014; prior to that, these services were marketed primarily under the Charter brand. Following the acquisitions of Time ...

7. Category 1 cable - Wikipedia

   en.wikipedia.org/wiki/Category_1_cable

   Category 1 cable, also known as Cat 1, Level 1, or voice-grade copper, is a grade of unshielded twisted pair cabling designed for telephone communications, and at one time was the most common on-premises wiring. The maximum frequency suitable for transmission over Cat 1 cable is 1 MHz, [1] but Cat 1 is not currently considered adequate for data ...