ITU Q.7:1988
ITU Q.7:1988 Signalling Systems To Be Used For International Automatic And Semi-automatic Telephone Working
Table of Contents
1Criteriaforselectingasignallingsystem1.1Satellitesystems
1.2Echosuppressors
1.3Speechinterpolationsystems(e.g.TASI)
2Furthercriteriaforselectingasignallingsystem
3CharacteristicsofthestandardCCITTSignalling
Systemsforgeneraluse
3.1SignallingSystemNo.4
3.2SignallingSystemNo.5
3.3SignallingSystemR1
3.4SignallingSystemR2
3.5SignallingSystemNo.6
3.6SignallingSystemNo.7
References