Table of Contents

Foreword
1 Scope
2 Conformance
3 References
4 Definitions
  4.1 Basic Call
  4.2 Incoming Call
  4.3 Outgoing Call
  4.4 User and Network
5 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 reassembly functions
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 Handling of configuration errors
  7.5 Status and status enquiry procedures
8 Procedures for circuit mode call control
  8.1 Call establishment at the originating interface
  8.2 Call Establishment at the destination interface
  8.3 Call clearing
  8.4 In-band tones and announcements
  8.5 Call collisions
  8.6 Suspend and Resume procedures
  8.7 TE side and PTN side SDL diagrams (informative)
9 Procedures for layer management
  9.1 Restart procedures
10 List of system parameters
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 (Codeset 0)
  12.6 Information elements of codeset 5
Annex A (informative): Use of progress indicators
Annex B (informative): Use of cause values
  B.1 Definition of cause values
  B.2 Use of causes for busy conditions
Annex C (informative): Examples of message sequences
  C.1 En-bloc sending
  C.2 Overlap sending
  C.3 Call clearing
Annex D (informative): Manufacturer specific
                       information
Annex E (informative): Bibliography
Annex F (informative): Terminal interchangeability
History

Abstract

Defines the Layer 3 protocol for signalling for the support of circuit mode bearer services at an interface at the S reference point between a Terminal Equipment (TE) and a Private Telecommunications Network (PTN). Applies to basic and primary rate accesses of PTNXs and to TEs that are meant for connection to such accesses.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	European Telecommunications Standards Institute
Pages
ISBN
Committee	STC ECMA