Specification of Legacy Signalling Via ATM
Table Of Contents

1 Overview and scope

1.1 Overview of requirement
1.2 Scope of specification
1.3 Structure of the Specification

2 References

3 Definitions and abbreviations

3.1 Definitions
3.2 Abbreviations

4 Overview of the approach taken in this Specification

4.1 Interconnecting narrowband equipment via ATM
4.2 Services provided by an AGS
4.3 Interworking principles
4.4 Trunking arrangements and configuration requirements
4.5 Protocol model
4.6 Functional model
4.7 Specification model

5 Switching (SW) functions

6 N-Mapping (NMP) functions

6.1 N-Physical Adaptation

6.1.1 2048 kbit/s Primary Rate user-network layer 1 interface
6.1.2 Basic Access user-network layer 1 interface
6.1.3 2048 kbit/s Digital Structured (D2048S) leased line interface
6.1.4 2048 kbit/s Digital Unstructured (D2048U) leased line interface
6.1.5 64 kbit/s Unrestricted Digital (D64U) leased line interface
6.1.6 2 048 kbit/s digital interface for DPNSS
6.1.7 OAM signals for narrowband trunks

6.2 N-Mapping Matrix & Bearer Conditioning

6.2.1 N-Channel Allocation
6.2.2 N-Bearer Conditioning

7 B-Mapping (BMP) functions

7.1 B-Physical Adaptation

7.1.1 Physical layer
7.1.2 Structurization (ATM layer)
7.1.3 OAM
7.1.4 VCC fault handling
7.1.5 AAL layer

7.2 B-Mapping Matrix

7.2.1 B-Channel Allocation
7.2.2 B-Bearer Conditioning for the DQ-channel
7.2.3 B-Bearer Conditioning for User IACs

8 Protocol Control (PC) functions

8.1 General
8.2 N-Protocol Control (DPNSS)
8.3 N-Protocol Control (N-QSIG / PSS1)

8.3.1 Basic call establishment and clearing
8.3.2 Use of the services of Signalling Carriage Mechanism
8.3.3 Message segmentation and re-assembly
8.3.4 Handling of protocol error conditions
8.3.5 STATUS ENQUIRY procedure
8.3.6 Procedures for call establishment
8.3.7 Procedures for call clearing
8.3.8 Handling and support of information elements
8.3.9 Timer values
8.3.10 Restart procedure for layer management
8.3.11 Generic functional protocol

8.4 N-Protocol Control (DSS1)

8.4.1 General
8.4.2 N-Protocol Control configured as the user side
8.4.3 N-Protocol Control configured as the network side
8.4.4 Support of Generic Functional Protocol

8.5 B-Protocol Control (DSS2)

8.5.1 General
8.5.2 Call / connection establishment at the originating interface
8.5.3 Call / connection establishment at the destination interface
8.5.4 Call/connection clearing
8.5.5 Restart procedure
8.5.6 Handling of error conditions
8.5.7 Procedures for the support of 64 kbit/s based circuit-mode ISDN services in B-ISDN
8.5.8 Support of information elements
8.5.9 Support of supplementary services

9 Connection Control (CC) functions

9.1 N-Connection Control (NCC) function

9.1.1 N-Link Control (NLC) functions
9.1.2 N-Link Element Control (NLEC) functions

9.2 B-Connection Control (BCC) function

9.2.1 B-IAL Control (BIALC) functions
9.2.2 B-IAC Control (BIC) functions

10 Scenario Management (SM) functions

10.1 General
10.2 State definitions
10.3 IAL / IAC establishment

10.3.1 Pre-programmed establishment
10.3.2 On-demand establishment (Originating AGS)
10.3.3 On-demand establishment (Terminating AGS)

10.4 IAL / IAC clearing

10.4.1 Pre-programmed clearing
10.4.2 On-demand clearing

10.5 IAL failure

11 Call Management (CM) functions

11.1 General
11.2 Call Control

11.2.1 Call Control states
11.2.2 Call establishment
11.2.3 Call clearing
11.2.4 Action on SVC failure

11.3 Additional Call Control for Break-Out / Break-In calls

11.3.1 Initial processing
11.3.2 Call establishment for Break-Out calls at the Originating AGS
11.3.3 Call establishment for Break-In calls at the Terminating AGS
11.3.4 Call clearing for Break-Out calls at the Originating AGS
11.3.5 Call clearing for Break-In calls at the Terminating AGS

11.4 Generic Functional Transport (GFT) Control

11.4.1 General
11.4.2 Call related procedures for the transport of APDUs
11.4.3 Connection oriented call independent APDU transport mechanism
11.4.4 Call related procedures for the transport of notifications
11.4.5 Mechanism for handling manufacturer specific information

11.5 Remote Operations Service Element (ROSE)

11.6 Supplementary Service (SS) Control functions

11.6.1 General
11.6.2 Supplementary services with Transit PINX requirements
11.6.3 Supplementary services with Gateway PINX requirements
11.6.4 Support of DPNSS Supplementary Services

Annex A (informative): Differences from ATM Forum Trunking Specification
Annex B (normative): System SDL diagrams
Annex C (normative): System primitives
Annex D (normative): Primitive translation for DPNSS
Annex E (normative): Supplemental ASN.1 definitions
Annex F (normative): Use of information elements for N-ISDN interworking

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Copyright © PQM Consultants 1998. This page was last updated on 27 May 1998.