ITU-T Recommendation M.1400 (04/97)

ITU-T Recommendation M.1400

Title :

Designations for international networks

Date of adoption : 04/1997

TABLE OF CONTENTS

		Page
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.

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Last Modified: 1997-11-25