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Home > Do it Yourself Resources > DIY Resources > Glossary of Terms > A

  • ACR The difference between attenuation and crosstalk , measured in dB, at a given frequency (acronym for Attenuation CrossTalk Ratio). Important characteristics in networking transmission to assure that signals sent down a twisted pair are stronger at the receiving end of the cable than the noise signals imposed on that same pair by crosstalk from other pairs.
  • American Wire Gauge(AWG) A standard for expressing wire diameter. As the AWG number gets smaller, the wire diameter gets larger.
  • Amplitude The maximum value of a varying wave form
  • ANSI AMerican National Standards Institute
  • ASTM The American Society for Testing and Materials, a standards organization which suggests test methods, definitions and practices.
  • Asynchronous Transfer Mode The SONET standard for a packet switching technique which uses packets of a fixed length.
  • ATM See Asynchronous Transfer Mode
  • Attenuation The decrease in magnitude of a signal as it travels through any transmitting medium, such as a cable or circuitry. Attenuation is measured as the logarithm of a ratio. It is expressed in decibels or dB.

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