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CAN/CSA-ISO/IEC 8208-02 (R2011)
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Information Technology - Data Communications - X.25 Packet Layer Protocol for Data Terminal Equipment (Adopted ISO/IEC 8208:2000, fourth edition, 2000-11-01)
Hardcopy , PDF
English
01-01-2002
Foreword
1 Scope
2 Normative references
2.1 Identical Recommendations - International
Standards
2.2 Paired Recommendations - International
Standards equivalent in technical content
2.3 Additional references
3 General considerations
3.1 Compatibility with versions of Recommendation
X.25
3.2 Environments
3.3 Differences in DTE/DTE and DTE/DCE operation
3.4 Operation over circuit-switched connections
3.5 Provision of the OSI Network Service
3.6 External Packet Layer interactions
3.7 Logical channels
3.8 Packet Layer entity
3.9 Packet types
3.10 Procedures for initialization
4 Procedures for restart
4.1 Originating a restart request
4.2 Receiving a restart indication
4.3 Restart collision
4.4 Restart confirmation
4.5 Determining "DTE" or "DCE" characteristics
5 Procedures for Virtual Call setup and clearing
5.1 Ready state
5.2 Procedures for Virtual Call setup
5.3 Rejecting a call
5.4 Aborting a call request
5.5 Procedures for Virtual Call clearing
6 Procedures for data and interrupt transfer
6.1 States for data and interrupt transfer
6.2 Maximum User Duo Field length of DATA packets
6.3 Delivery Confirmation bit
6.4 More Data mark
6.5 Complete packet sequence
6.6 Qualifier bit
6.7 Fragmentation and reassembly of messages
6.8 Procedures far interrupt
6.9 Transit delay of DATA packets
7 Procedures for flow control
7.1 Flow control
7.2 Throughput characteristics and throughput
classes
8 Procedures for reset
8.1 Originating a reset request
8.2 Receiving a reset indication
8.3 Reset collision
8.4 Reset confirmation
9 Effects of clear, reset, and restart procedures
on the transfer of packets
10 Effects of Layers 1 and 2 on the Packet Layer
11 Error handling
11.1 The DIAGNOSTIC packet
11.2 Non-receipt of window-rotation information
11.3 Receipt of erroneous DATA packets
12 Packet formats
12.1 General
12.2 Call setup and call clearing packets
12.3 DATA and interrupt packets
12.4 Flow control packets
12.5 Reset packets
12.6 Restart packets
12.7 DIAGNOSTIC packet
12.8 REJECT packet
12.9 Registration packets
13 Procedures for optional user facilities
13.1 On-line Facility Registration
13.2 Extended and Super Extended Packet Sequence
Numbering
13.3 D-bit Modification
13.4 Packet Retransmission
13.5 Incoming Calls Barred
13.6 Outgoing Calls Barred
13.7 One-way Logical Channel Outgoing
13.8 One-way Logical Channel Incoming
13.9 Nonstandard Default Packet Sizes
13.10 Nonstandard Default Window Sizes
13.11 Default Throughput Classes Assignment
13.12 Flow Control Parameter Negotiation
13.13 Throughput Class Negotiation facilities
13.14 Closed User Group related facilities
13.15 Bilateral Closed User Group related facilities
13.16 Fast Select
13.17 Fast Select Acceptance
13.18 Reverse Charging
13.19 Reverse Charging Acceptance
13.20 Local Charging Prevention
13.21 Network User Identification (NUI) related
facilities
13.22 Charging Information
13.23 RDA related facilities
13.24 Hunt Group
13.25 Call Redirection and Call Deflection related
facilities
13.26 Called Line Address Modified Notification
13.27 Transit Delay Selection and Indication
13.28 Alternative Addressing related facilities
13.29 TOA/NPI address subscription
13.30 Reference Number
14 Procedures for optional ITU-T specified DTE facilities
14.1 Calling Address Extension
14.2 Called Address Extension
14.3 Minimum Throughput Class Negotiation
14.4 End-to-End Transit Delay Negotiation
14.5 Priority
14.6 Protection
14.7 Expedited Data Negotiation
15 Format for Facility Field in tail setup/clearing
packets
15.1 General
15.2 Coding of the Facility Field for optional user
facilities
15.3 Coding of the Facility Field for ITU-T
specified DTE facilities
16 Format for Registration Field in registration packets
16.1 General
16.2 Coding of the Registration Field for
registration-facilities
17 Diagnostic codes
18 Timers and retransmission counts
19 State diagrams
20 State tables
21 Conformance
21.1 Static conformance
21.2 Protocol Implementation Conformance Statement
21.3 Dynamic conformance
Annexes
A - Private networks
B - PICS Proforma
C - Differences between various editions of ISO/IEC 5208
D - Abbreviations
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