PD 6645:2000

0.3 Contents
0 PREFACE
      0.1 Title
      0.2 Normative references
      0.3 Contents
      0.4 History
      0.5 Issue Control
      0.6 References
      0.7 Glossary of Terms
1 INTRODUCTION
      1.0 Scope
      1.1 Scope of PNO-ISC/SPEC/006
      1.2 Contents of PNO-ISC/SPEC/006
2 MESSAGE TYPES AND CONTENTS
      2.0 Scope
      2.1 General
      2.2 Message Groups and Types
      2.3 Message Contents
      2.4 Parameter Formats and Code Allocations
ANNEX 2.A - Service Indicator Code (SIC) Allocations
      2.A.1 - General
      2.A.2 - Octet 1
      2.A.3 - Octet 2
ANNEX 2.B - Validity of Release Reasons when RPI = 0
3 COMMON PROCEDURES
      3.0 Scope
      3.1 General
      3.2 Common Call Control Procedures
      3.3 Call Control Error Handling Procedures
      3.4 Circuit Blocking/Unblocking Procedures
      3.5 Timer Table
4 TELEPHONY CALL
      4.0 Scope
      4.1 Service Overview
      4.2 Formats and Codes
      4.3 Signalling Procedures
      4.4 Message Sequence Diagram
5 SPARE
6 ISDN CALL
      6.0 Scope
      6.1 Service Overview
      6.2 Formats and Codes
      6.3 Signalling Procedures
      6.4 Message Sequence Diagram
7 SPARE
8 SPARE
9 CALLING LINE IDENTIFICATION PRESENTATION & RESTRICTION
      (CLIP & CLIR)
      9.0 Scope
      9.1 Service Overview
      9.2 Information Flows
      9.3 Formats and Codes
      9.4 Signalling Procedures
      9.4 Variances
10 NUMBER PORTABILITY
      10.0 Scope
      10.1 Formats and Codes
      10.2 Signalling Procedures
      10.3 Message Sequence Diagram
11 COMPLETION OF CALLS TO BUSY SUBSCRIBER (CCBS)
      11.0 Scope
      11.1 Service Overview
      11.2 Formats and Codes
      11.3 Signalling Procedures
      11.4 Message Sequence Diagram
12 TARGETED TRANSIT
      12.0 Scope
      12.1 Formats and Codes
      12.2 Signalling Procedures
13 SPARE
14 SPARE
15 SPARE
16 OPERATOR SERVICES
      16.0 Scope
      16.1 Service Overview
      16.2 Message Types and Contents
      16.3 Signalling Procedures - Basic Service
      16.4 Signalling Procedures - Override Service
      16.5 Signalling Procedures - Intercept Service

Gives an introduction and context to specification PNO-ISC/SPEC/006.