ITU-T E.180 FRENCH-1998
Technical Characteristics of Tones for the Telephone Service - Series E: Overall Network Operation Telephone Service Service Operation and Human Factors - Operation Numbering Routing and Mobile Services - International Operation - Tones in National Signal

Standard No.

ITU-T E.180 FRENCH-1998

Release Date

1998

Published By

International Telecommunication Union (ITU)

Latest

ITU-T E.180 FRENCH-1998

Scope

This Recommendation sets the limits and recommended values of cadences, frequencies and levels for tones used in the telephone service. Those technical characteristics are relevant either for audible tones applied within the network or for those generated at the digital terminal equipment.

ITU-T E.180 FRENCH-1998 history

• 1998 ITU-T E.180 FRENCH-1998 Technical Characteristics of Tones for the Telephone Service - Series E: Overall Network Operation Telephone Service Service Operation and Human Factors - Operation Numbering Routing and Mobile Services - International Operation - Tones in National Signal