| ectaportal.com | European Competitive Telecommunications Association |
| ctca.ca | Ctca - Page Not Found |
| ctamtexas.com | CTAM of Texas |
| comptelaction.org | CompTel - Competitive Telecommunications Association |
| competitivebroadband.org | Competitive Broadband Coalition |
| billing.org | Global Billing Association |
| babt.co.uk | British Approvals Board for Telecommunications (UK) |
| alts.org | Association for Local Telecommunications Services (ALTS) |
| itainfo.org | Indiana Telecommunications Association |
| fitce.org | Federation of Telecoms Engineers of the EC |
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