I.S. ETS 300 172:1994

Foreword
Section I - General
1 Scope
2 Field of application
3 Conformance
4 References
5 Definitions and Acronyms
   5.1 Definitions
   5.2 Acronyms
6 General principles
   6.1 Protocol Model
   6.2 Services Provided to Call Control
   6.3 Services Required of the Data Link Layer
   6.4 Protocol Control States
   6.5 Message Segmentation and Re-assembly Functions
   6.6 Call Control
Section II - Procedures
7 General procedures
   7.1 Use of the Services of Layer 2
   7.2 Message Segmentation Procedures
   7.3 Handling of protocol error conditions
   7.4 Status and Status Enquiry Protocol Procedures
8 Circuit-Switched Call Control Procedures
   8.1 Call establishment
   8.2 Call clearing
   8.3 Call Collisions
   8.4 Protocol Control SDL Diagram (informative)
   8.5 Transit PTNX Call Control requirements
   8.6 Transit Call Control SDL Diagrams (informative)
   8.7 Originating PTNX Call Control requirements
   8.8 Terminating PTNX Call Control requirements
   8.9 Incoming Gateway PTNX Call Control requirements
   8.10 Outgoing Gateway PTNX Call Control requirements
9 Procedures For Layer Management
   9.1 Restart procedures
10 Protocol Timers
Section III - Messages
11 Functional Definition and Content of Messages
   11.1 Messages For General Procedures
   11.2 Messages For Circuit Mode Call Control
   11.3 Messages For Layer Management
12 General message format and coding of information elements
   12.1 Overview
   12.2 Protocol discriminator
   12.3 Call Reference
   12.4 Message type
   12.5 Other information elements for Basic Call Control
        (Codeset 0)
   12.6 Information elements of Codeset 5
Annex A (informative) Use of the Cause information element
      A.1 Definition of QSIG cause Values
      A.2 Use of causes for Busy Conditions
Annex B (informative) Examples of Message Sequences
      B.1 Enbloc Sending
      B.2 Overlap Sending
      B.3 Call Clearing
Annex C (informative) Manufacturer Specific Information
Annex D (normative) Protocol Implementation Conformance
        Statement (PICS) Proforma
      D.1 Introduction
      D.2 Instructions for completing the PICS proforma
      D.3 PICS proforma for ETS 300 172
Annex E (informative) Relationship to ETS 300 172 First Edition
History