1
Scope
2 References
2.1 Normative references
2.2 Bibliography (non-normative
references)
3 Definitions
4 Abbreviations
5 General framework of the AAL type
2 signalling protocol
5.1 Interface between the AAL type 2
signalling entity and the AAL type 2 served user
5.1.1 Service provided by the AAL type 2 signalling entity
5.1.2 Primitives between AAL type 2 signalling entities and the AAL type 2
served user
5.1.3 Parameters between AAL type 2 signalling entities and the AAL type 2
served user
5.2 Interface between the AAL type 2
signalling entity and the generic signalling transport
5.2.1 Service provided by the generic signalling transport service
5.2.2 Primitives between AAL type 2 signalling entities and the generic
signalling transport
5.2.3 Parameters between AAL type 2 signalling entities and the generic
signalling transport
5.2.4 AAL type 2 signalling entity – initial conditions
5.2.5 State transition diagram for sequences of primitives of the generic
signalling transport service
5.3 Interface between the AAL type 2
signalling entity and layer management
5.3.1 Service provided by layer management
5.3.2 Primitives between AAL type 2 signalling entities and layer management
5.3.3 Parameters between AAL type 2 signalling entities and layer management
6 Forward and backward compatibility
6.1 Backward compatibility rules
6.2 Forward compatibility mechanism
7 Format and coding of AAL type 2
signalling protocol
7.1 Coding conventions for the AAL
type 2 signalling protocol
7.1.1 Principles
7.1.2 General format of messages
7.1.3 General format of parameters
7.1.4 General format of fixed length fields
7.1.5 General format of variable length fields
7.2 Format and coding of the AAL type
2 signalling protocol messages
7.2.1 AAL type 2 signalling protocol messages
7.2.2 Parameters of the AAL type 2 signalling protocol messages
7.3 Parameter specification of the AAL
type 2 signalling protocol messages
7.3.1 Cause
7.3.2 Connection element identifier
7.3.3 Destination E.164 service endpoint address
7.3.4 Destination NSAP service endpoint address
7.3.5 Link characteristics
7.3.6 Originating signalling association identifier
7.3.7 Served user generated reference
7.3.8 Served user transport
7.3.9 Service specific information (audio)
7.3.10 Service specific information (multirate)
7.3.11 Service specific information (SAR-assured)
7.3.12 Service specific information (SAR-unassured)
7.3.13 Test connection indicator
7.4 Field specification of the AAL
type 2 signalling protocol parameters
7.4.1 Compatibility
7.4.2 Signalling association identifier
7.4.3 AAL type 2 path identifier
7.4.4 Channel identifier
7.4.5 Organizational unique identifier
7.4.6 Audio service
7.4.7 Multirate service
7.4.8 Segmentation and reassembly (assured data transfer)
7.4.9 Segmentation and reassembly
(unassured data transfer)
7.4.10 Served user generated reference
7.4.11 CPS-SDU bit rate
7.4.12 CPS-SDU size
7.4.13 Nature of address
7.4.14 E.164 address
7.4.15 NSAP address
7.4.16 Cause value
7.4.17 Diagnostics
7.4.18 Served user transport
8 Procedure of the AAL type 2
signalling protocol
8.1 Compatibility
8.1.1 General requirements on receipt of unrecognized signalling information
8.1.2 Procedures for the handling of the unrecognized messages or parameters
8.1.3 Procedures for the handling of
responses indicating unrecognized information has been sent
8.2 Nodal functions
8.2.1 Nodal functions for AAL type 2 nodes with served user interaction
8.2.2 Nodal functions for AAL type 2 nodes without served user interaction
8.3 Protocol entity
8.3.1 General protocol error handling
8.3.2 Outgoing protocol procedures
8.3.3 Incoming protocol procedures
8.3.4 Maintenance protocol procedures
8.4 List of timers
Annex A - Support
for non-switched scenario
A.1 Introduction
A.2 References
A.3 Definitions
A.4 Abbreviations
A.5 General framework of the AAL type
2 signalling protocol
A.5.1 Interface between the AAL type 2 signalling entity and the AAL type 2
served user
A.5.2 Service provided by the generic signalling transport service
A.5.3 Interface between the AAL type 2 signalling entities and layer
management
A.6 Forward and backward compatibility
A.7 Format and coding of AAL type 2 signalling
protocol
A.7.1 Coding conventions for the AAL type 2 signalling protocol
A.7.2 Format and coding of the AAL type 2 signalling protocol messages
A.7.3 Parameter specification of the AAL type 2 signalling protocol messages
A.7.4 Field specification of the AAL type 2 signalling protocol parameters
A.8 Procedure of the AAL type 2
signalling protocol
A.8.1 Compatibility
A.8.2 Nodal functions
A.8.3 Protocol entity
A.8.4 List of timers
Appendix I - Example
message sequences
I.1 Successful establishment and
release
I.2 Unsuccessful establishment
I.3
Management message sequences
I.4 Release crossover/release
collision
I.5 Resource contention