CONTENTS

Definitions
Abbreviations
 1     Scope
 2     General interworking scenario
 3     Tasks of the IWF
 4     Access to an IWF from the telex network
        4.1     One-stage selection
                  4.1.1     Procedure
        4.2     Two-stage selection
        4.3     Notes to Table 2 and Table 3a
                  4.3.1     Note 1     
                  4.3.2     Note 2     
        4.4     Use of a Status Enquiry Function
 5     Text transfer
        5.1     Description of text transfer modes
                  5.1.1     Real time
                  5.1.2     Store-and-forward
                  5.1.3     Store-and-retrieve
        5.2     Text transfer in a packet switched environment
        5.3     End of text transfer
 6     Conformance to the international telex service
 7     Access to telex from other networks/services
        7.1     Call set-up
        7.2     Text Transfer Phase
                  7.2.1     Real time
                  7.2.2     Store-and-forward
        7.3     Handling of recall address
                  7.3.1     One-stage IWF
                  7.3.2     Two-stage IWF
 8     Clearing
 9     Notifications, Journals, Advise of Status
10     Ineffective call attempts
11     Reaction to abnormal conditions
12     Interworking by the use of a telex store-and-forward unit
Annex A  –  General scheme for access protocols