ITU-T Q.35-1998
Technical Characteristics of Tones for the Telephone Service -Series Q: Switching and Signalling - International Automatic and Semi-Automatic Working - Tones for Use in National Signalling Systems RECMN E.180; Study Group 2

Standard No.

ITU-T Q.35-1998

Release Date

1998

Published By

International Telecommunication Union (ITU)

Latest

ITU-T Q.35-1998

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

ITU-T Q.35-1998 history

• 1998 ITU-T Q.35-1998 Technical Characteristics of Tones for the Telephone Service -Series Q: Switching and Signalling - International Automatic and Semi-Automatic Working - Tones for Use in National Signalling Systems RECMN E.180; Study Group 2