Telco Glossary

Common terms in CLEC regulatory work:

  • CLEC — Competitive Local Exchange Carrier
  • ILEC — Incumbent Local Exchange Carrier (e.g. AT&T, Verizon, Lumen)
  • IXC — Inter-Exchange Carrier (long distance)
  • ICA — Interconnection Agreement (Secs. 251/252)
  • UNE — Unbundled Network Element
  • OSS — Operations Support Systems (ordering/billing access)
  • USF — Universal Service Fund (FCC Form 499)
  • NANPA — North American Numbering Plan Administrator
  • LNP — Local Number Portability
  • E911 — Enhanced 911 emergency routing obligations
  • CALEA — Communications Assistance for Law Enforcement Act
  • PUC / PSC — state Public Utility / Service Commission

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