CONTENTS

�1���� Scope
�2���� References
�3���� Definitions
�4���� Abbreviations and acronyms
�5���� Conventions
�6���� Framework
������� 6.1���� Layer 1
������� 6.2���� Layer 2
������� 6.3���� Implementation
������� 6.4���� Operator information
�7���� Designations of public switched circuit interconnections
������� 7.1���� General
������� 7.2���� Telephone-type circuits
������� 7.3���� Circuit used for switched telex and telegraph services
������� 7.4���� Interconnecting circuits in the public switched data network
������� 7.5���� Related information
�8���� Related information for public switched circuit interconnections
������� 8.1���� Urgency for restoration [item 1]
������� 8.2���� Terminal countries [item 2]
������� 8.3���� Names of Network operators/service providers [item 3]
������� 8.4���� Control station (sub-control station(s)) [item 4]
������� 8.5���� Fault report points [item 5]
������� 8.6���� Routing [item 6]
������� 8.7���� Association [item 7]
������� 8.8���� Equipment information [item 8]
������� 8.9���� Use [item 9]
������ 8.10���� Transmission medium information [item 10]
������ 8.11���� Composition of the transmission [item 11]
������ 8.12���� Bandwidth or bit rate [item 12]
������ 8.13���� Signalling type [item 13]
�9���� Designations of fixed (non-switched) circuit interconnections between operators
������� 9.1���� General
������� 9.2���� Leased circuit interconnections
������� 9.3���� Fixed (non-switched) public circuits
������� 9.4���� Related information
10���� Related information for fixed circuit interconnections
������ 10.1���� Urgency for restoration [item 1]
������ 10.2���� Terminal countries [item 2]
������ 10.3���� Names of Network operators/service providers [item 3]
������ 10.4���� Control station (sub-control station(s)) [item 4]
������ 10.5���� Fault report points [item 5]
������ 10.6���� Routing [item 6]
������ 10.7���� Association [item 7]
������ 10.8���� Equipment information [item 8]
������ 10.9���� Use [item 9]
����� 10.10���� Transmission medium information [item 10]
����� 10.11���� Composition of the transmission [item 11]
����� 10.12���� Bandwidth or bit rate [item 12]
����� 10.13���� Signalling type [item 13]
����� 10.14���� Applicable ITU-T Recommendations [item 14]
11���� Designations of group, supergroup, etc. (bidirectional and unidirectional) interconnections
������ 11.1���� General
������ 11.2���� Bidirectional groups, etc.
������ 11.3���� Unidirectional groups and supergroups
������ 11.4���� Related information
12���� Designations of group link, supergroup link and line link interconnections
������ 12.1���� Group and supergroup links
������ 12.2���� Line links
������ 12.3���� Related information
13���� Related information for group, group link and line link interconnections
������ 13.1���� Urgency for restoration [item 1]
������ 13.2���� Terminal countries [item 2]
������ 13.3���� Names of Network operators/service providers [item 3]
������ 13.4���� Control station [sub-control station(s) [item 4]
������ 13.5���� Fault report points [item 5]
������ 13.6���� Routing [item 6]
������ 13.7���� Association [item 7]
������ 13.8���� Equipment information [item 8]
������ 13.9���� Use [item 9]
����� 13.10���� Transmission medium information [item 10]
����� 13.11���� End-to-end information or Operational Agreement [item 11]
����� 13.12���� Bandwidth [item 12]
����� 13.13���� Occupancy (for groups/supergroups, etc., and for line links) [item 13]
14���� Designations of digital block (bidirectional and unidirectional) interconnections
������ 14.1���� General
������ 14.2���� Bidirectional digital blocks
������ 14.3���� Restoration digital blocks
������ 14.4���� Multiple destination unidirectional digital blocks
������ 14.5���� Single destination unidirectional digital blocks
������ 14.6����Related information
15���� Designation of digital path interconnections
������ 15.1���� Conventional digital paths not connected to their terminal equipment
������ 15.2���� Restoration digital paths
������ 15.3���� Digital line sections and digital radio sections
������ 15.4���� Related information
16���� Designations of routes in the mixed analogue/digital transmission network
������ 16.1���� Transmission routes with one analogue-to-digital conversion
������ 16.2���� Transmission routes with two analogue-to-digital conversions
������ 16.3���� Transmission routes with more than two analogue-to-digital conversions
������ 16.4���� Related information
17���� Designation of data transmission systems
������ 17.1���� General
������ 17.2���� Data transmission links
������ 17.3���� Related information
18���� Designations of digital block interconnections created by the interconnection of Digital Circuit Multiplication Equipments (DCMEs)
������ 18.1���� General
������ 18.2���� Multi-clique configuration of DCMEs
������ 18.3���� Low rate encoding equipment
������ 18.4���� Related information
19���� SDH
������ 19.1���� Designation of multiplex sections of the Synchronous Digital Hierarchy (SDH)
������ 19.2���� Designations of Virtual Container interconnections
����� �19.3���� Concatenated virtual containers
������ 19.4���� Leased circuits based on SDH
20���� Related information for digital block, path, data transmission system, block interconnections created by the interconnection of DCMEs, SDH multiplex sections and Virtual Containers
������ 20.1���� Urgency for restoration [item 1]
������ 20.2���� Terminal countries [item 2]
������ 20.3���� Names of network operators/service providers [item 3]
������ 20.4���� Control station [sub-control station(s)] [item 4]
������ 20.5���� Fault report points [item 5]
������ 20.6���� Routing [item 6]
������ 20.7���� Association [item 7]
������ 20.8���� Equipment information [item 8]
������ 20.9���� Use [item 9]
����� 20.10���� Transmission medium information [item 10]
����� 20.11��� �End-to-end information or composition of transmission or Operational Agreement [item 11]
����� 20.12���� Bit rate (for blocks, paths and SDH multiplex sections) [item 12]
����� 20.13���� Occupancy (except for paths) [item 13]
����� 20.14���� Actual number of channels and access point identifier [item 14]
����� 20.15���� Clocking information (for blocks only) [item 15]
����� 20.16���� Direction of transmission (for unidirectional blocks) [item 16]
21���� Designation of connections for the Asynchronous Transfer Mode (ATM)
������ 21.1���� General
������ 21.2���� Transport links
������ 21.3���� Virtual path
������ 21.4���� Virtual channels
������ 21.5���� ATM Layer 2
22���� Related information for the Asynchronous Transfer Mode (ATM)
������ 22.1���� Urgency for restoration [item 1]
������ 22.2���� Terminal countries [item 2]
������ 22.3���� Names of Network operators/service providers [item 3]
������ 22.4���� Control and sub-control station(s) [item 4]
������ 22.5���� Fault report points [item 5]
������ 22.6���� Routing [item 6]
������ 22.7���� Association [item 7]
������ 22.8���� Equipment information [item 8]
������ 22.9���� Use [item 9]
����� 22.10���� Transmission medium information [item 10]
����� 22.11���� Operational agreement [item 11]
����� 22.12���� Unassigned item [item 12]
����� 22.13���� Occupancy [item 13]
����� 22.14���� Direction of transmission (for unidirectional transit Network Services only) [item 14]
����� 22.15���� ATM transfer capability [item 15]
����� 22.16���� Source traffic descriptor [item 16]
����� 22.17���� Cell Delay variation tolerance [item 17]
����� 22.18���� Quality of Service [item 18]
23���� Transit network services
������ 23.1���� General
������ 23.2���� Transit digital transmission service
������ 23.3���� Transit dark fibre service
������ 23.4���� Related information
24���� Related information on transit network service
������ 24.1���� Urgency for restoration [item 1]
������ 24.2���� Terminal countries [item 2]
������ 24.3���� Names of network operators/service providers [item 3]
������ 24.4���� Control station [sub-control station(s)] [item 4]
������ 24.5���� Fault report points [item 5]
������ 24.6���� Routing [item 6]
������ 24.7���� Association [item 7]
������ 24.8���� Equipment information [item 8]
������ 24.9���� Use [item 9]
����� 24.10���� Transmission medium information [item 10]
����� 24.11���� SLA [item 11]
����� 24.12���� Bit rate [item 12]
����� 24.13���� Commercial identifier [item 13]
����� 24.14���� Unassigned item[item 14]
����� 24.15����Clocking information [item 15]
����� 24.16���� Direction of transmission (for unidirectional transit network services only) [item 16]
25���� Designations for wavelength division multiplexing (Simple and Dense)
������ 25.1���� General
������ 25.2���� The equipment
������ 25.3���� Configurations for the newly created transmission systems
������ 25.4���� General format for the optical transmission systems
������ 25.5���� Related information
26���� Related information on DWDM
27���� Designation of connections for the Digital Subscriber Line (DSL)
������ 27.1���� General
������ 27.2���� Related information for the ADSL connections
������ 27.3���� Related information for the SDSL connection
������ 27.4���� Examples
28���� Exceptional designations
������ 28.1� ���Exceptional designations with intelligence in the serial number
Annex A � Full examples for designation information
������� A.1���� Full example for the designation information of a public switched telephone circuit
������� A.2���� Full example for the designation information of a leased analogue circuit
������� A.3���� Full examples for the designation information of a group and a group link interconnection
������� A.4���� Full examples for the designation information of a digital block, digital path, data transmission system, blocks created between DCMEs, Virtual Containers and SDH multiplex section interconnections
AnnexB � KLM addressing and its relationship to time slot� numbering for virtual containers
������� B.1���� KLM addressing relationship to time slot numbering
������� B.2���� KLM addressing of VC-4 occupancy
������� B.3���� Comparative notation of KLM addressing vs. time slot numbering
Annex C � Reference clause numbers for the various types of routes
Annex D � Numbering of channels in data transmission systems
Annex E � Notification form for List of ITU Carrier Codes