SDN Blog

Demystifying Telecom Acronyms

Posted on Monday, October 05, 2009 in Broadband Internet

Blog written by SDN Communications

Telecom industry veterans are used to using acronyms. However, for the average telecom user, these terms and abbreviations can get confusing. Below is a “translation guide” to some of the most commonly used terms:

  • BROADBAND: A transmission facility having a bandwidth of greater than 20 kHz.
  • CO: Central Office (the nearby building containing the local telco switch which provides local telephone service. Also, the physical point where calls enter the long distance network.)
  • COAX: Coaxial Cable
  • CPE: Customer Premise Equipment
  • DID: Direct Inward Dialing
  • LAN: Local Area Network
  • WLAN: Wireless LAN
  • POTS: Plain Old Telephone Service
  • WAN: Wide Area Network
  • ATM: Asynchronous Transfer Mode
  • Bit: Binary digit
  • FITL: Fiber in the Loop
  • FR: Frame Relay
  • FRAD: Frame Relay Access Device
  • FT1: Fractional T1
  • IPX: Internet Packet Exchange
  • MAC: Media Access Control (sub-layer 2)
  • NOC: Network Operations Center
  • OC1: Optical Carrier level 1 (51.84 Mbps)
  • PBX: Private Branch Exchange
  • QoS: Quality of Service
  • SIP: Single In-line Package
  • SONET: Synchronous Optical Network
  • UPS: Uninterruptible Power Supply
  • VC: Virtual Circuit