CONTENTS

Scope
PART I – GENERAL CONSIDERATIONS APPLICABLE TO ALL CONFIGURATIONS
 1     General principles
 2     Quality of Service objectives
 3     Configuration models
        3.1     Minimum integration
        3.2     Maximum integration
 4     Terminal adaptors
PART II – USE OF THE B-CHANNEL OF THE ISDN IN CIRCUIT MODE FOR THE PROVISION OF THE INTERNATIONAL TELEX SERVICE
 1     Minimum integration model
 2     Maximum integration model
 3     Call establishment sequences
        3.1     Minimum integration model
        3.2     Maximum integration model
 4     Terminal adaptor functions
 5     Access unit
 6     Tasks of the interworking function
 7     Other telex service features
PART III – USE OF THE D-CHANNEL FOR THE PROVISION OF THE INTERNATIONAL TELEX SERVICE
 1     Quality of Service
 2     Switching signalling
 3     Text and data transmission
 4     Telex access points
 5     Telex-to-ISDN connections and vice versa
 6     Special procedures for different configuration models, incorporating switching
 7     Switching signalling conversion
 8     Conversion of telex message characters
 9     Recapitulation