I-ETS 300 245-7 : NOV 95

Foreword
1 Scope
2 Normative references
3 Definitions and use of tones
4 Tone classification and minimum requirements
5 Control of tone generation
  5.1 Dial tones (normal or special)
  5.2 Ringing tone
  5.3 Call reject and invalid attempt
  5.4 Call waiting tone
6 Tone characteristics
  6.1 Sound pressure level
  6.2 Distortion
  6.3 Frequency and cadence
  6.4 Switching delay (informative)
Annex A (normative): Selection of tones according to
                     cause values
Annex B (normative): Test specifications
  B.1 General conditions for testing
  B.2 Tone measurements
Annex C (normative): Tone characteristics
  C.1 General
  C.2 Dial tone
  C.3 Ringing tone
  C.4 Busy tone
  C.5 Congestion tone
  C.6 Special information tone
  C.7 Call waiting tone
History