ITU-T Recommendation M.1400 Title : Designations for international networks Date of adoption : 04/1997 TABLE OF CONTENTS 0 General 1 0.1 Layer 1 1 0.2 Layer 2 2 0.3 Layer 3 2 0.4 Implementation 2 1 Designations of international public switched circuits 3 1.1 General 3 1.2 Telephone-type circuits 4 1.2.1 General 4 1.2.2 Telephone circuits used in manual operation 5 1.2.3 One-way telephone circuits used for semi-automatic or automatic operation 5 1.2.4 Both-way telephone circuits used for semi-automatic or automatic operation 5 1.3 Circuit used for switched telex and telegraph services 6 1.4 Circuits in the international public switched data network 6 1.5 Related information 6 2 Related information for international public switched circuit 6 2.1 Urgency for restoration [item 1)] 6 2.2 Terminal countries [item 2)] 7 2.3 Names of Administrations or carriers [item 3)] 7 2.4 Control station [sub-control station(s)] [item 4)] 7 2.5 Fault report points [item 5)] 8 2.6 Routing [item 6)] 8 2.7 Association [item 7)] 9 2.8 Equipment information [item 8)] 9 2.9 Use [item 9)] 10 2.10 Transmission medium information [item 10)] 10 2.11 Composition of the transmission [item 11)] 10 2.12 Bandwidth or bit rate [item 12)] 11 2.13 Signalling type [item 13)] 11 3 Designations of international fixed (non-switched) circuits 12 3.1 General 12 3.2 International leased circuits 12 3.2.1 General 12 3.2.2 Analogue leased circuits used for telephony 13 3.2.3 Analogue leased circuits used for telegraphy 13 3.2.4 Leased telegraph circuits 14 3.2.5 Analogue leased circuits used for data transmission 14 3.2.6 Analogue leased circuits used for phototelegraphy or facsimile 14 3.2.7 Analogue leased circuits used for sound-programme transmission 14 3.2.8 Analogue leased circuits used for television transmission 15 3.2.9 Leased circuits used for digital video transmission 15 3.2.10 Analogue leased circuits connecting circuit multiplication terminal equipments as renters' premises 15 3.2.11 Analogue leased circuits used for transmission other than those designated in the paragraphs above, or used for combinations of transmissions 15 3.2.12 Analogue leased circuits connecting three or more locations 16 3.2.13 Leased analogue groups, supergroups, etc. 16 3.2.14 Leased analogue group, supergroup links 16 3.2.15 Digital leased circuits connecting two locations 17 3.2.16 Digital leased circuits connecting three or more locations 17 3.3 Fixed (non-switched) public circuits 18 3.3.1 General 18 3.3.2 Circuits used for sound-programme transmission 18 3.3.3 Circuits used for television transmission 19 3.3.4 Circuits for digital audio and video transmission 19 3.3.5 Telephone-type circuits used for phototelegraphy or facsimile 19 3.3.6 Telephone-type circuits used to provide voice-frequency telegraph links 20 3.3.7 Telephone-type circuits used to provide TDM (Time Division Multiplex) telegraph systems 20 3.3.8 Telephone-type circuits used for data transmission 20 3.3.9 Telephone-type circuits used as transfer links for common channel Signalling Systems No. 6 and No. 7 20 3.4 Related information 21 4 Related information for international fixed circuits 21 4.1 Urgency for restoration [item 1)] 21 4.2 Terminal countries [item 2)] 22 4.3 Names of Administrations, carriers or broadcasting companies [item 3)] 22 4.4 Control station [sub-control station(s)] [item 4)] 22 4.5 Fault report points [item 5)] 23 4.6 Routing [item 6)] 23 4.7 Association [item 7)] 24 4.8 Equipment information [item 8)] 25 4.9 Use [item 9)] 25 4.10 Transmission medium information [item 10)] 25 4.11 Composition of the transmission [item 11)] 26 4.12 Bandwidth or bit rate [item 12)] 26 4.13 Signalling type [item 13)] 27 4.14 Applicable CCITT/ITU-T Recommendations [item 14)] 27 5 Designations of international groups, supergroups, etc. (bidirectional and unidirectional) 27 5.1 General 27 5.2 Bidirectional groups, etc. 28 5.2.1 Group 28 5.2.2 Supergroup 29 5.2.3 Mastergroup 29 5.2.4 Supermastergroup 29 5.2.5 Use of the groups, etc. 29 5.2.6 Restoration groups and supergroups 29 5.3 Unidirectional groups and supergroups 30 5.3.1 Multiple destination unidirectional groups and supergroups 30 5.3.2 Single destination unidirectional groups and supergroups 30 5.4 Related information 31 6 Designations of international group links, supergroup links and line links 31 6.1 Group and supergroup links 31 6.1.1 Conventional links not connected to their terminal equipment 31 6.1.2 Restoration links 31 6.2 Line links 32 6.3 Related information 33 7 Related information for international groups, group links and line links 33 7.1 Urgency for restoration [item 1)] 33 7.2 Terminal countries [item 2)] 34 7.3 Names of Administrations, carriers or broadcasting companies [item 3)] 34 7.4 Control station [sub-control station(s) [item 4)] 34 7.5 Fault report points [item 5)] 35 7.6 Routing [item 6)] 36 7.7 Association [item 7)] 36 7.8 Equipment information [item 8)] 37 7.9 Use [item 9)] 37 7.10 Transmission medium information [item 10)] 37 7.11 End-to-end information (for mixed analogue/digital routes only) [item 11)] 38 7.12 Bandwidth [item 12)] 38 7.13 Occupancy (for groups/supergroups, etc., and for line links) [item 13)] 38 8 Designations of international digital blocks (bidirectional and unidirectional) 39 8.1 General 39 8.2 Bidirectional digital blocks 41 8.2.1 Symmetrical configuration 41 8.2.2 Asymmetrical configuration 41 8.3 Restoration digital blocks 41 8.4 Multiple destination unidirectional digital blocks 41 8.5 Single destination unidirectional digital blocks 42 8.6 Related information 42 9 Designation of international digital paths 43 9.1 Conventional digital paths not connected to their terminal equipment 43 9.2 Restoration digital paths 43 9.3 Digital line sections and digital radio sections 43 9.4 Related information 43 10 Designations of routes in the mixed analogue/digital transmission network 44 10.1 Transmission routes with one analogue-to-digital conversion 44 10.1.1 Groups and supergroups, etc., forming part of a mixed analogue/digital transmission route 44 10.1.2 Digital blocks and paths forming part of a mixed analogue/digital transmission route 44 10.1.3 End-to-end designations 45 10.2 Transmission routes with two analogue-to-digital conversions 45 10.2.1 End-to-end designations 45 10.2.2 Intermediate section designation 46 10.3 Transmission routes with more than two analogue-to-digital conversions 46 10.4 Related information 46 11 Designation of data transmission systems 46 11.1 General 46 11.2 Data transmission links 49 11.3 Related information 49 12 Designations of international digital blocks created by the interconnection of Digital Circuit Multiplication Equipments (DCMEs) 50 12.1 General 50 12.2 Multi-clique configuration of DCMEs 51 12.3 Low Rate Encoding Equipment 52 12.4 Related information 52 13 Designations of international Virtual Containers 52 13.1 General 52 13.2 Related information 53 14 Designation of multiplex sections of the Synchronous Digital Hierarchy (SDH) 54 14.1 General 54 14.2 Related information 55 15 Related information for international digital blocks, paths, data transmission systems, blocks created by the interconnection of DCMEs, Virtual Containers and SDH multiplex sections 55 15.1 Urgency for restoration [item 1)] 55 15.2 Terminal countries [item 2)] 56 15.3 Names of Administration, carriers or broadcasting companies [item 3)] 56 15.4 Control station [sub-control station(s)] [item 4)] 57 15.5 Fault report points [item 5)] 57 15.6 Routing [item 6)] 58 15.7 Association [item 7)] 59 15.7.1 Information on reserve blocks, paths, data transmission systems created digital blocks between DCMEs, Virtual Containers and multiplex sections 59 15.7.2 Information on diverse routing 59 15.7.3 Information on consecutive routing 59 15.8 Equipment information [item 8)] 60 15.8.1 This item records information on equipment in the block, path, etc., which requires special maintenance attention 60 15.8.2 For data transmission systems, this item supplies information about the multiplex configuration 60 15.8.3 For blocks created by the interconnection of DCMEs, this item provides information on through-going channels (which are transmitted even if a DCME fails) and derived channels (which are not transmitted if a DCME fails) 61 15.9 Use [item 9)] 61 15.10 Transmission medium information [item 10)] 61 15.11 End-to-end information or composition of transmission [item 11)] 62 15.11.1 End-to-end information (for blocks and paths on mixed analogue/digital routes only) 62 15.11.2 Composition of transmission (for data transmission systems) 62 15.12 Bit rate (for blocks, paths and SDH multiplex sections) [item 12)] 62 15.13 Occupancy (except for paths) [item 13)] 63 15.14 Actual number of channels and access point identifier [item 14)] 65 15.14.1 Actual number of channels (primary blocks only) 65 15.14.2 Access point identifiers (virtual containers and SDH multiplex sections) 66 15.15 Clocking information (for blocks only) [item 15)] 67 15.16 Direction of transmission (for unidirectional blocks) [item 16)] 67 16 Designation of connections for the Asynchronous Transport Mode (ATM) 68 16.1 General 68 16.2 Transport Links 68 16.3 Virtual path 69 16.4 Virtual channels 69 Annex A Full examples for designation information 70 A.1 Full example for the designation information of a public switched telephone circuit 70 A.2 Full example for the designation information of a leased analogue circuit 71 A.3 Full examples for the designation information of an international group and an international group link 71 A.3.1 Full example for the designation information of an international group 71 A.3.2 Full example for the designation information of an international group link 72 A.4 Full examples for the designation information of an international digital block, digital path, data transmission system, blocks created between DCMEs, Virtual Containers and SDH multiplex sections 73 A.4.1 Full example for the designation information of an international digital block (bidirectional) 73 A.4.2 Full example for the designation information of an international digital path 77 A.4.3 Full example for the designation information of an international data transmission system 77 A.4.4 Full example for the designation information of a block created by the interconnection of DCMEs 78 A.4.5 Full example for the designation of an international Virtual Container 79 A.4.6 Full example for the designation information of an international multiplex section 80 Annex B KLM addressing and its relationship to time slot numbering for virtual containers 81 B.1 KLM addressing relationship to time slot numbering 81 B.2 KLM addressing of VC4 occupancy 81 B.3 Comparative notation of KLM addressing vs. time slot numbering 82 Annex C Reference subclause numbers for the various types of routes 84 Annex D Alphabetical list of abbreviations used in this Recommendation 87 Annex E Numbering of channels in data transmission systems 88 Summary This Recommendation covers the designations of international circuits, groups, group and line links, digital blocks, digital paths, data transmission systems, digital blocks created between DCMEs, virtual containers and multiplex sections. The designation information is in two layers: - Layer 1: The unique information; the designation; - Layer 2: Additional information; the related information. Guidance for the user is provided in a series of examples.