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
      
     

1.0 Gives an introduction and context to PNO-ISC/SPEC/006 1.1 Defines signalling methods, codes and formats used to support Standard customer services and network features at interconnect point between public networks in UK that use C7 IUP protocol. The service is not supported on any specific interconnect or network. Services shall be determined by agreement between operators of the interconnected networks. Service overviews are for information only. 2.0 This part provides a library of messages and parameters for use across a national interconnect between two public Network Operators. Some are not standardised for national interconnects and their codes and formats are not part of this specification.