TA TSV 001061 : ISSUE 1

1 Introduction
1.1 Overview and Purpose
1.2 Scope
1.3 Document Organization
1.4 Key Documents
1.5 Conventions
1.6 Terminology
2 Overview and Background
2.1 Open Interfaces Defined for Switching Systems
2.2 Inter-Switching System Interface (ISSI) Overview
2.2.1 ISSI Protocol Architecture
2.2.2 ISSI Service Users
2.2.3 Layer, System, and Network Management Entities
2.3 Exchange Access SMDS (XA-SMDS)
2.3.1 Service Description
2.3.2 Service Features
2.3.3 ICI Protocol Architecture
3 Memory Administration Generic Requirements
3.1 Introduction
3.2 Summary of Memory Administration Functions
3.3 ISSI Memory Administration NE Generic
              Requirements
3.3.1 Functional Criteria
3.3.2 Administered Data
3.3.2.1 ISSI Level-1 Data
3.3.2.2 ISSI Level-2 Data
3.3.2.3 ISSI Level-3 Data
3.3.2.4 Data Needed by ISSIP Service Users
3.4 XA-SMDS Memory Administration NE Generic
              Requirements
3.4.1 Functional Criteria
3.4.2 Administered Data
3.4.2.1 ICI Communications Data
3.4.2.2 XA-SMDS Service Feature Data
4 Maintenance Network Element Generic Requirements
4.1 Goals, Methods, and Perspectives
4.1.1 Alarm Monitoring
4.1.1.1 Failure Conditions - Incoming & Outgoing Signals
4.1.1.2 Failure Conditions - SS NE Internal Integrity
4.1.2 Performance Monitoring
4.1.2.1 Strategy and Algorithms
4.1.2.2 Performance Monitoring at the Physical Level
4.1.2.3 Performance Monitoring at Levels 2 and 3
4.1.3 Testing
4.1.3.1 Testing Functions at the Physical Level
4.1.3.2 Diagnostics
4.2 ISSI Maintenance Network Element Generic
              Requirements
4.2.1 Introduction
4.2.1.1 Maintenance Perspective - IntraLATA,
              Intra-network Architecture
4.2.2 Performance Monitoring Plan for ISSI
4.2.2.1 ISSI Level-2 Performance Monitoring Plan
4.2.2.2 ISSI Level-3 Performance Monitoring Plan
4.2.2.3 Procedural Errors
4.2.2.4 End-to-End Maintenance Procedures
4.2.3 Testing
4.2.3.1 Testing Functions at ISSI Levels 2 and 3
4.3 XA-SMDS Maintenance Network Element Generic
              Requirements
4.3.1 The InterLATA Architecture from a Maintenance
              Perspective
4.3.1.1 End-to-End Integrity
4.3.1.2 ICI Integrity
4.3.1.3 Routing and Screening in Other Networks
4.3.2 Alarm Monitoring
4.3.2.1 Alarm Conditions - Incoming & Outgoing Signal
4.3.2.2 Alarm Conditions - SS Internal Integrity
4.3.3 Performance Monitoring
4.3.3.1 Strategy and Algorithms
4.3.3.2 Level-1 Performance Monitoring
4.3.3.3 Protocol Performance Monitoring
4.3.4 Testing
4.3.4.1 Physical Testing
4.3.4.2 ICI Protocol Testing
4.3.4.3 Inter-network Testing
5 Network Data Collection NE Generic Requirements
5.1 Introduction
5.2 Summary of Existing NDC Requirements
5.2.1 Common Data Collection and Usage Measurements
5.2.2 Data Collecting and Reporting Management
5.3 ISSI Network Data Collection NE Generic
              Requirements
5.3.1 ISSI Scheduled Measurements
5.3.1.1 ISSI Congestion Measurements
5.3.1.2 ISSI Link Measurements
5.3.2 ISSI Special Studies Measurements
5.3.2.1 ISSI Traffic Characterization
5.3.2.2 ISSI Length Characterization
5.4 XA-SMDS Network Data Collection NE Generic
              Requirements
5.4.1 XA-SMDS Scheduled Measurements
5.4.1.1 XA-SMDS Congestion Measurements
5.4.1.2 XA-SMDS IC Access Measurements
5.4.1.3 XA-SMDS Subscriber Access Measurements
5.4.2 XA-SMDS Special Studies Measurements
5.4.2.1 XA-SMDS Traffic Characterization
5.4.2.2 XA-SMDS Length Characterization
6 Order of Precedence for Processing - ISSI and
              XA-SMDS Protocol Data Units
6.1 Overview
6.2 Order of Precedence for Processing ISSI Protocol
              Data Units
6.2.1 Processing BOM Segments
6.2.2 Processing COM Segments
6.2.3 Processing EOM Segments
6.2.4 Processing SSM Segments
6.2.5 Additional Processing by L3_RME
6.2.6 Additional Processing by L3_LME
6.2.7 Additional Processing by ISSIP Service Users
6.3 Order of Precedence for Processing XA-SMDS
              Protocol Data Units
6.3.1 Processing SIP L3_PDUs (Originating XS-SMDS)
6.3.2 Processing ICI PDUs (Terminating XA-SMDS)
6.3.2.1 Processing BOM Segments
6.3.2.2 Processing COM Segments
6.3.2.3 Processing EOM Segments
6.3.3 Other Processing for XA-SMDS PDUs
7 List of Acronyms
8 Glossary
9 Referenced Documents
A APPENDIX A ISSI Protocol Data Unit Formats
  A.1 ISSI Level-2 Protocol Data Unit Formats
  A.2 ISSI Level-3 Protocol Data Unit Format
  A.3 RMP Packet Formats
  A.3.1 RMPDU Header Format
  A.3.2 Hello Packet Format
  A.3.3 Link State Advertisement Format
  A.3.3.1 The Link State Advertisement Header
  A.3.3.2 Router Link Advertisement Format
  A.3.3.3 AS External Link Advertisement Format
  A.3.4 Database Description Packet Format
  A.3.5 Link State Request Packet Format
  A.3.6 Link State Update Packet Format
  A.3.7 Link State Acknowledgement Packet Format
  A.4 Format of Layer Management PDUs
  A.4.1 Encapsulation of ECNs in L3_DTPDUs
  A.4.2 Format of ECN Messages
B APPENDIX B ICI Protocol Data Unit Formats
  B.1 ICI Level 2_Protocol Data Unit Format
  B.2 ICI Level 3_Protocol Data Unit Format
LIST OF FIGURES
Figure 2-1 Example of Network Supporting SMDS
Figure 2-2 ISSI Protocol Architecture and Its Service Users
Figure 2-3 ISSI Level-2 and Level-3 PDUs, and SIP L3_PDU
              Encapsulation
Figure 2-4 ISSI Layer, System, and Network Management Entities
Figure 2-5 SMDS Framework
Figure A-1 ISSI (Level-2) Cell Format
Figure A-2 ISSI (Level-2) SAR_PDU Format
Figure A-3 ISSI (Level-2) CVG_PDU Format
Figure A-4 ISSI Level-3 DTPDU Format
Figure A-5 RMPDU Header
Figure A-6 The Hello Packet
Figure A-7 The Link State Advertisement Header
Figure A-8 Router Links Advertisements
Figure A-9 AS External Links Advertisements
Figure A-10 The Database Description Packet Format
Figure A-11 The Link State Request Packet Format
Figure A-12 The Link State Update Packet Format
Figure A-13 The Link State Acknowledgement Packet
Figure A-14 Encapsulation of an ECN Message in an ISSI
              L3_DTPDU
Figure A-15 ECN Message Format
Figure A-16 Information Field Format of ECN Message
Figure A-17 Entity Description Subfield of the ECN
              Information field
Figure B-1 ICI Level 2 Protocol Data Unit (L2_PDU) Format
Figure B-2 ICI Level 3_Protocol Data Unit (L3_PDU) Format
LIST OF TABLES
Table 4-1 ISSI Level-2 Monitored Parameters
Table 4-2 Valid Values for the Service Type Field
Table 4-3 Valid Values for the Protocol Discriminator Field
Table 4-4 ISSI Level-3 Monitored Parameters
Table 4-5 Summary of ISSI Performance Monitoring Functions
Table 4-6 Summary of ICI Performance Monitoring Functions
Table 5-1 Summary of ISSI NDC Scheduled Measurements
Table 5-2 Summary of ISSI NDC Special Studies Measurements
Table 5-3 Summary of XA-SMDS NDC Scheduled Measurements
Table 5-4 Summary of XA-SMDS NDC Special Studies Measurements
Table 6-1 Order of Precedence for ISSI BOM Segments
Table 6-2 Order of Precedence for ISSI COM Segments
Table 6-3 Order of Precedence for ISSI EOM Segments
Table 6-4 Order of Precedence for ISSI SSM Segments
Table 6-5 Order of Precedence for Processing ISSI RMPDUs
Table 6-6 Order of Precedence for Processing ISSI LMPDUs
Table 6-7 Order of Precedence for SIP BOM Segments at Ingress
Table 6-8 Order of Precedence for SIP SSM Segments at Ingress
Table 6-9 Order of Precedence for ICIP BOM Segments
Table 6-10 Order of Precedence for ICIP COM Segments
Table 6-11 Order of Precedence for ICIP EOM Segments
Table A-1 RMPDU Types
Table A-2 Entity Type Codes
Table A-3 Congestion Level Codes