ITU-T Rec. X.224 (1995 E) iii
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9 Specification for class 1 – Basic error recovery class .................................................................................... 39
10 Specification for class 2 – Multiplexing class................................................................................................ 40
11 Specification for class 3 – Error recovery and multiplexing class ................................................................. 42
12 Specification for class 4 – Error detection and recovery class....................................................................... 43
13 Structure and encoding of TPDUs ................................................................................................................. 55
13.1 Validity ............................................................................................................................................... 55
13.2 Structure.............................................................................................................................................. 55
13.3 Connection Request (CR) TPDU........................................................................................................ 57
13.4 Connection Confirm (CC) TPDU ....................................................................................................... 62
13.5 Disconnect Request (DR) TPDU ........................................................................................................ 62
13.6 Disconnect Confirm (DC) TPDU ....................................................................................................... 63
13.7 Data (DT) TPDU................................................................................................................................. 64
13.8 Expedited Data (ED) TPDU ............................................................................................................... 65
13.9 Data Acknowledgement (AK) TPDU................................................................................................. 66
13.10 Expedited Data Acknowledgement (EA) TPDU ................................................................................ 68
13.11 Reject (RJ) TPDU............................................................................................................................... 68
13.12 TPDU Error (ER) TPDU .................................................................................................................... 69
14 Conformance.................................................................................................................................................. 70
14.5 Claims of conformance shall state ...................................................................................................... 79
Annex A – State tables .............................................................................................................................................. 80
A.1 General................................................................................................................................................ 80
A.2 Conventions ........................................................................................................................................ 80
A.3 Tables.................................................................................................................................................. 81
A.4 State tables for classes 0 and 2............................................................................................................ 83
A.5 State tables for classes 1 and 3............................................................................................................ 86
A.6 State tables for class 4 over CONS ..................................................................................................... 88
A.7 State tables for class 4 over CLNS...................................................................................................... 97
Annex B – Network connection management subprotocol ....................................................................................... 100
B.1 Introduction......................................................................................................................................... 100
B.2 Scope................................................................................................................................................... 100
B.3 Definitions .......................................................................................................................................... 100
B.4 Abbreviations...................................................................................................................................... 101
B.5 Overview of the protocol .................................................................................................................... 101
B.6 Elements of procedure ........................................................................................................................ 102
B.7 Protocol operation............................................................................................................................... 106
B.8 Structure and encoding of TPDUs ...................................................................................................... 110
B.9 Conformance....................................................................................................................................... 112
B.10 State table............................................................................................................................................ 113
B.11 Diagram for NCMS protocol operation .............................................................................................. 115
Annex C – PICS Proforma ........................................................................................................................................ 110
C.1 General................................................................................................................................................ 110
C.2 Identification....................................................................................................................................... 110
C.3 Indices used in this Annex ................................................................................................................. 111
C.4 Based Recommendation | International Standard conformance.......................................................... 113
C.5 General statement of conformance...................................................................................................... 113
C.6 Protocol implementation..................................................................................................................... 113
C.7 NCMS functions ................................................................................................................................. 113
C.8 Initiator/responder capability for protocol classes 0 - 4...................................................................... 114
C.9 Supported functions ............................................................................................................................ 114
C.10 Supported TPDUs............................................................................................................................... 120
C.11 Supported parameters of issued TPDUs ............................................................................................. 121