ITU-T Rec. X.42 (03/2000) Procedures and methods for accessing a public data network from a DTE operating under control of .. Summary Source CONTENTS Procedures and methods for accessing a public data network from a DTE operating under control of a generalized poll... 1 Scope 2 References 3 Definitions 4 Abbreviations 5 GPAD framework 5.1 Assumptions 6 General configuration 6.1 Data stations 6.2 Transmission considerations 6.3 Protocol sequence 7 Elements of procedure 7.1 Definition of PDUs and PDU components 7.2 Procedures 7.3 Full/Half-duplex considerations 7.4 Timeout function considerata 7.5 Link end points association 7.6 Error detection and recovery 7.7 Addressing conventions 8 Structure and encoding of Protocol Data Units (PDUs) 8.1 PDU types 8.2 Data transparency 9 Classes of procedures 9.1 X.42 PAD Configuration 9.2 Normal Poll Mode class 9.3 Selective Poll Mode class - Description of procedures 9.4 Poll priority mode class 9.5 Encapsulation Mode Class - Description and procedures 10 Proxy operation ANNEX A - Point to Multipoint (PMP) network ANNEX B - Explanatory notes on the implementation of frame check sequences ANNEX C ANNEX D - Proxy Operation - X.42 PAD with proxy terminal IP code APPENDIX I