BS 6961:1988

National foreword
Committees responsible
Specification
0. Introduction
1. Scope and field of application
2. References
Section one. General
3. Definitions
4. Symbols and abbreviations
5. Overview of the session protocol
Section two. Session protocol specification
6. Use of the transport service
7. Elements of procedure related to SPDUs
8. Structure and encoding of SPDUs
Section three. Conformance
9. Conformance to this International Standard
Annexes
A. State tables
B. Relationship to CCITT Recommendation T.62 encoding
C. PGIs and PIs reserved for use by CCITT
    Recommendation T.62
D. Corrections incorporated in ISO 8327: 1987
Tables
1. Session service primitives
2. Transport service primitives
3. Functional units
4. Tokens associated with functional units
5. Token restrictions
6. Category 0, 1 and 2 SPDUs
7. Valid basic concatenation of SPDUs
8. Valid extended concatenation of SPDUs
9. Contention winner
10. SPDUs associated with the PREPARE SPDU
11. Parameters of the CONNECT SPDU
12. Parameters of the ACCEPT SPDU
13. Parameters of the REFUSE SPDU
14. Parameters of the FINISH SPDU
15. Parameters of the DISCONNECT SPDU
16. Parameters of the NOT FINISHED SPDU
17. Parameters of the ABORT SPDU
18. Parameters of the EXPEDITED SPDU
19. Parameters of the TYPED DATA SPDU
21. Parameters of the CAPABILITY DATA SPDU
22. Parameters of the CAPABILITY DATA ACK SPDU
23. Parameters of the GIVE TOKENS SPDU
24. Parameters of the PLEASE TOKENS SPDU
25. Parameters of the MINOR SYNC POINT SPDU
26. Parameters of the MINOR SYNC ACK SPDU
27. Parameters of the MAJOR SYNC POINT SPDU
28. Parameters of the MAJOR SYNC ACK SPDU
29. Parameters of the RESYNCHRONIZE SPDU
30. Parameters of the RESYNCHRONIZE ACK SPDU
31. Parameters of the PREPARE SPDU
32. Parameters of the EXCEPTION REPORT SPDU
33. Parameters of the EXCEPTION DATA SPDU
34. Parameters of the ACTIVITY START SPDU
35. Parameters of the ACTIVITY RESUME SPDU
36. Parameters of the ACTIVITY INTERRUPT SPDU
37. Parameters of the ACTIVITY DISCARD SPDU
38. Parameters of the ACTIVITY END SPDU
39. Incoming events
40. States
41. Outgoing events
42. Operations on variables
43. Specific actions
44. Predicates
45. Connection establishment state table
46. Data transfer state table
47. Synchronization state table
48. Resynchronization state table
49. Activity interrupt and discard state table
50. Activity start, resume and capability data state
    table
51. Token management and exceptions state table
52. Connection release state table
53. Abort state table
54. Relationship between T.62 commands and responses
    and ISO 8327 SPDUs
55. Relationship between T.62 PGI/PI and ISO 8327
    parameters
56. PGIs and PIs reserved for use by CCITT
    Recommendation T.62
Figures
1. Relationship between the session protocol and
    adjacent services
2. Model of the Session Layer
3. Illustration of TSDU structures
4. Illustration of definition of TSDU structure
5. Illustration of structure of SPDUs, PGI and PI units
6. Examples of SPDU structure

Specifies procedures for the transfer of data and control information between peer session entities; means of selecting procedures by use of functional units; and structure and encoding of session protocol data units.