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National Network Tone Standards Update by Dobrica Ilic is a document available to read on EtoBox.
What is National Network Tone Standards Update about?
This document provides an updated list of various tones used in national telecommunication networks according to ITU-T Recommendation E.180. It contains the frequencies and cadences of common tones like busy, dial, ringing, and call waiting tones for many different countries. Administrations are reminded to keep this list up-to-date by notifying ITU/TSB whenever new tones are introduced. The list will be amended in future issues of the ITU Operational Bulletin.
- Author
- Dobrica Ilic
- Language
- EN