CONTENTS

 1     Introduction and scope    
 2     References 
 3     Definitions  
 4     Abbreviations   
 5     Conventions     
 6     Overview   
        6.1     Phase 1 – V.140 signature transmission and acquisition       
        6.2     Phase 2 – Channel characterization
        6.3     Phase 3 – Capability exchange and mode selection 
        6.4     Using V.140 to switch among multimedia operation modes 
        6.5     Interoperability with terminals that do not support V.140    
        6.6     Interworking with PSDSNs
 7     Network types 
 8     Signals
        8.1     Data stream model 
        8.2     Phase 1 – V.140 signature block and compatible protocol field       
        8.3     Phase 2 – Alignment probing          
        8.4     Phase 3 signals      
        8.5     Phase 3 HDLC framing      
 9     Procedures
        9.1     Channel establishment        
        9.2     Phase 1 – Signature transmission and acquisition     
        9.3     Phase 2 – Determination of network characteristics and bit alignment          
        9.4     Phase 3 – Role arbitration, capability exchange, and mode selection
        9.5     Entering selected mode      
10     Resuming V.140 from a selected mode   
Annex A – ASN.1 definition of Phase 3 PDU values