Category 1 cable

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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 considered adequate for data transmission.[2]

Although not an official category standard established by TIA/EIA, Category 1 has become the de facto name given to Level 1 cables originally defined by Anixter International, the distributor. Cat 1 cable was typically used for networks that carry only voice traffic, for example telephones. Official TIA/EIA-568 standards have only been established for cables of Category 3 ratings or above.


Citations and notes[edit]

  1. ^ Meyers; Page 69.
  2. ^ Carpenter; Page 231.


  • Meyers, Mike. All-In-One ComptTIA Network+ Exam Guide, Fifth Edition, McGraw Hill Publishing, 2012.
  • Carpenter, Tom. CompTIA CTP+, Convergence Technologies Professional Certification Study Guide, McGraw Hill Publishing, 2012.

External links[edit]