PD 6645:1999

0 PREFACE
    0.1 TITLE
    0.2 Normative Information
    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
2.A ANNEX 2.A - Service Indicator Code (SIC) Allocations
2.B 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
    9.5 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 Diagrams
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