Rec. ITU-T Q.957 (03/1993) … STAGE 3 DESCRIPTION FOR ADDITIONAL INFORMATION TRANSFER SUPPLEMENTARY SERVICES ...
FOREWORD
CONTENTS
1 User-to-User Signalling (UUS)
    1.1 Definition
    1.2 Description
    1.3 Operational requirements
    1.4 Coding requirements
    1.5 Signalling requirements
    1.6 Interaction with other supplementary services
    1.7 Interactions with other networks
    1.8 Signalling flow
    1.9 Parameter values (timers)
    1.10 Dynamic description (SDLs)
References