IEC 62287-1:2010
(Main)Maritime navigation and radiocommunication equipment and systems - Class B shipborne equipment of the automatic identification system (AIS) - Part 1: Carrier-sense time division multiple access (CSTDMA) techniques
Maritime navigation and radiocommunication equipment and systems - Class B shipborne equipment of the automatic identification system (AIS) - Part 1: Carrier-sense time division multiple access (CSTDMA) techniques
IEC 62287-1:2010 specifies the minimum operational and performance requirements, methods of testing and required test results for Class B shipborne AIS equipment using CSTDMA techniques. This standard takes into account other associated IEC International Standards and existing national standards, as applicable. It is applicable for AIS equipment used on craft that are not covered by the mandatory carriage requirement of AIS under SOLAS Chapter V. The major technical changes with respect to the first edition are the following. The reference to the relevant recommendation of the ITU has been updated from M.1371-1 to M.1371-4 with some consequential small changes. A previous option of providing short safety-related messages in 6.5.1.5 has been removed on advice from the IMO. A new requirement for a default MMSI has been added in 6.4 and a further new requirement for protection from invalid control commands has been added in 6.8. Some test methods have been updated and, in particular, small revisions have been made to the frequencies used for testing in some of the test methods.
Matériels et systèmes de navigation et de radiocommunication maritimes - Transpondeur embarqué du système d'identification automatique (AIS) de classe B - Partie 1: Technique d'accès multiple par répartition dans le temps avec écoute de porteuse (CSTDMA)
L'IEC 62287-1:2010 spécifie les exigences minimales opérationnelles et de performance, les méthodes d'essai et les résultats d'essai exigibles pour le transpondeur embarqué du système d'identification automatique (AIS) de classe B utilisant les techniques CSTDMA. La présente norme prend en compte d'autres normes internationales IEC associées et des normes nationales existantes, selon le cas. Elle est applicable aux équipements AIS utilisés sur le navire, qui ne sont pas visés par l'exigence relative aux AIS de bord obligatoires selon le Chapitre V de la SOLAS. Une station AIS conçue pour fonctionner en mode réception uniquement n'est pas considérée comme une station AIS mobile embarquée de Classe B. Les principales modifications techniques par rapport à la première édition sont les suivantes:
- La référence à la recommandation pertinente de l'UIT a été mise à jour, par passage de M.1371-1 à M.1371-4, avec pour conséquence quelques petits changements.
- Une option antérieure consistant à fournir des messages courts liés à la sécurité en 6.5.1.5 a été éliminée sur conseil de l'OMI.
- Une nouvelle exigence concernant un MMSI par défaut a été ajoutée en 6.4 et une nouvelle exigence concernant la protection contre les commandes invalides a été ajoutée en 6.8.
- Certaines méthodes d'essai ont été mises à jour et, en particulier, de petites révisions ont été effectuées sur les fréquences utilisées pour les essais dans certaines des méthodes d'essai.
- L'introduction a été supprimée, du fait qu'elle ne présentait qu'un intérêt historique.
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IEC 62287-1 ®
Edition 2.0 2010-11
INTERNATIONAL
STANDARD
colour
inside
Maritime navigation and radiocommunication equipment and systems – Class B
shipborne equipment of the automatic identification system (AIS) –
Part 1: Carrier-sense time division multiple access (CSTDMA) techniques
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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International Standards for all electrical, electronic and related technologies.
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IEC 62287-1 ®
Edition 2.0 2010-11
INTERNATIONAL
STANDARD
colour
inside
Maritime navigation and radiocommunication equipment and systems – Class B
shipborne equipment of the automatic identification system (AIS) –
Part 1: Carrier-sense time division multiple access (CSTDMA) techniques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XD
ICS 47.020.70 ISBN 978-2-88912-257-8
– 2 – 62287-1 ã IEC:2010(E)
CONTENTS
FOREW ORD . 7
1 Sc o pe . 9
2 Normative references . 9
3 Abbreviations . 10
4 General requirements . 11
4.1 General . 11
4.1.1 Capabilities of the Class B“CS” AIS. 11
4.1.2 Quality assurance . 12
4.1.3 Safety of operation . 12
4.1.4 Additional features . 12
4.1.5 Modes of operation. 12
4.2 Manuals . 13
4.3 Marking and identification . 13
5 Environmental, power supply, interference and safety requirements. 13
6 Performance requirements. 14
6.1 Composition . 14
6.2 Operating frequency channels . 14
6.3 GNSS receiver for position reporting . 14
6.4 Identification . 15
6.5 AIS information . 15
6.5.1 Information content . 15
6.5.2 Information reporting intervals . 16
6.5.3 Permissible initialisation period. 17
6.6 Alarms and indications, fall-back arrangements . 17
6.6.1 Integrity and protection . 17
6.6.2 Transmitter shutdown procedure . 17
6.6.3 Position sensor fallback conditions. 17
6.6.4 SOG/COG sensor fallback conditions . 19
6.7 User interface . 19
6.7.1 Indicators and display . 19
6.7.2 Static data input . 19
6.7.3 External interfaces . 19
6.8 Protection from invalid control commands . 19
7 Technical requirements . 20
7.1 General . 20
7.2 Physical layer . 20
7.2.1 General . 20
7.2.2 Transceiver characteristics . 21
7.2.3 Transmitter requirements . 22
7.2.4 Receiver requirements . 22
7.3 Link layer . 23
7.3.1 General . 23
7.3.2 Link sublayer 1: Medium access control (MAC) . 23
7.3.3 Link sublayer 2: Data Link Service (DLS) . 26
7.3.4 Link sublayer 3: Link management entity (LME) . 30
62287-1 ã IEC:2010(E) – 3 –
7.4 Network layer . 39
7.4.1 General . 39
7.4.2 Dual channel operation . 39
7.4.3 Channel management . 40
7.4.4 Distribution of transmission packets . 40
7.4.5 Data link congestion resolution . 40
7.5 Transport layer . 40
7.5.1 General . 40
7.5.2 Transmission packets . 41
7.5.3 Sequencing of data packets . 41
7.6 Digital selective calling (DSC) . 41
8 Test conditions . 41
8.1 General . 41
8.2 Normal and extreme test conditions . 41
8.2.1 Normal test conditions . 41
8.2.2 Extreme test conditions. 41
8.3 Test signals . 41
8.3.1 Standard test signal number 1 . 42
8.3.2 Standard test signal number 2 . 42
8.3.3 Standard test signal number 3 . 42
8.3.4 Standard test signal number 4 . 42
8.3.5 Standard test signal number 5 . 42
8.4 Test arrangements . 43
8.4.1 Standard test environment . 43
8.4.2 Modes of operation of the transmitter . 44
8.4.3 Common test conditions for protection from invalid controls . 44
8.4.4 Measurement uncertainties . 44
9 Power supply, environmental and EMC tests . 45
9.1 Test summary . 45
9.2 Vibration/shock . 46
9.2.1 Vibration . 46
9.2.2 Shock . 46
9.3 Performance tests/checks . 46
9.4 Undervoltage test (brown out) . 47
9.4.1 Purpose . 47
9.4.2 Method of test . 47
9.4.3 Required result . 47
10 Operational tests . 47
10.1 General . 47
10.1.1 Quality assurance . 47
10.1.2 Safety of operation . 47
10.1.3 Additional features . 47
10.2 Modes of operation . 48
10.2.1 Autonomous mode . 48
10.2.2 Assigned mode . 49
10.2.3 Polled mode/interrogation response . 50
10.3 Messages extending one time period . 51
10.3.1 Method of measurement . 51
10.3.2 Required results . 51
– 4 – 62287-1 ã IEC:2010(E)
10.4 Channel selection . 51
10.4.1 Valid channels . 51
10.4.2 Invalid channels . 51
10.5 Internal GNSS receiver . 51
10.6 AIS information . 52
10.6.1 Information content . 52
10.6.2 Information update rates . 53
10.7 Initialisation period . 54
10.7.1 Method of measurement . 54
10.7.2 Required results . 54
10.8 Alarms and indications, fall-back arrangements .
...
IEC 62287-1 ®
Edition 2.1 2013-04
INTERNATIONAL
STANDARD
colour
inside
Maritime navigation and radiocommunication equipment and systems – Class B
shipborne equipment of the automatic identification system (AIS) –
Part 1: Carrier-sense time division multiple access (CSTDMA) techniques
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,
please contact the address below or your local IEC member National Committee for further information.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
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It also gives information on projects, replaced and additional languages. Also known as the International
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IEC 62287-1 ®
Edition 2.1 2013-04
INTERNATIONAL
STANDARD
colour
inside
Maritime navigation and radiocommunication equipment and systems – Class B
shipborne equipment of the automatic identification system (AIS) –
Part 1: Carrier-sense time division multiple access (CSTDMA) techniques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 47.020.70 ISBN 978-2-8322-0793-2
– 2 – 62287-1ã IEC:2010+A1:2013(E)
CONTENTS
FOREW ORD . 7
INTRODUCTION to Amendment 1 .9
1 Scope . 10
2 Normative references . 10
3 Abbreviations . 11
4 General requirements . 12
4.1 General . 12
4.1.1 Capabilities of the Class B“CS” AIS. 12
4.1.2 Quality assurance . 13
4.1.3 Safety of operation . 13
4.1.4 Additional features . 13
4.1.5 Modes of operation. 13
4.2 Manuals . 14
4.3 Marking and identification . 14
5 Environmental, power supply, interference and safety requirements. 14
6 Performance requirements. 15
6.1 Composition . 15
6.2 Operating frequency channels . 15
6.3 GNSS receiver for position reporting . 15
6.4 Identification . 16
6.5 AIS information . 16
6.5.1 Information content . 16
6.5.2 Information reporting intervals . 17
6.5.3 Permissible initialisation period. 18
6.6 Alarms and indications, fall-back arrangements . 18
6.6.1 Integrity and protection . 18
6.6.2 Transmitter shutdown procedure . 18
6.6.3 Position sensor fallback conditions. 18
6.6.4 SOG/COG sensor fallback conditions . 20
6.7 User interface . 20
6.7.1 Indicators and display . 20
6.7.2 Static data input . 20
6.7.3 External interfaces . 20
6.8 Protection from invalid control commands . 20
7 Technical requirements . 21
7.1 General . 21
7.2 Physical layer . 21
7.2.1 General . 21
7.2.2 Transceiver characteristics . 22
7.2.3 Transmitter requirements . 23
7.2.4 Receiver requirements . 23
7.3 Link layer . 24
7.3.1 General . 24
7.3.2 Link sublayer 1: Medium access control (MAC) . 24
7.3.3 Link sublayer 2: Data Link Service (DLS) . 27
62287-1ã IEC:2010+A1:2013(E) – 3 –
7.3.4 Link sublayer 3: Link management entity (LME) . 31
7.4 Network layer . 40
7.4.1 General . 40
7.4.2 Dual channel operation . 40
7.4.3 Channel management . 41
7.4.4 Distribution of transmission packets . 41
7.4.5 Data link congestion resolution . 41
7.5 Transport layer . 41
7.5.1 General . 41
7.5.2 Transmission packets . 42
7.5.3 Sequencing of data packets . 42
7.6 Digital selective calling (DSC) . 42
8 Test conditions . 42
8.1 General . 42
8.2 Normal and extreme test conditions . 42
8.2.1 Normal test conditions . 42
8.2.2 Extreme test conditions. 42
8.3 Test signals . 42
8.3.1 Standard test signal number 1 . 43
8.3.2 Standard test signal number 2 . 43
8.3.3 Standard test signal number 3 . 43
8.3.4 Standard test signal number 4 . 43
8.3.5 Standard test signal number 5 . 43
8.4 Test arrangements . 44
8.4.1 Standard test environment . 44
8.4.2 Modes of operation of the transmitter . 45
8.4.3 Common test conditions for protection from invalid controls . 45
8.4.4 Measurement uncertainties . 45
9 Power supply, environmental and EMC tests . 46
9.1 Test summary . 46
9.2 Vibration/shock . 47
9.2.1 Vibration . 47
9.2.2 Shock . 47
9.3 Performance tests/checks . 47
9.4 Undervoltage test (brown out) . 48
9.4.1 Purpose . 48
9.4.2 Method of test . 48
9.4.3 Required result . 48
10 Operational tests . 48
10.1 General . 48
10.1.1 Quality assurance . 48
10.1.2 Safety of operation . 48
10.1.3 Additional features . 48
10.2 Modes of operation . 49
10.2.1 Autonomous mode . 49
10.2.2 Assigned mode . 50
10.2.3 Polled mode/interrogation response . 51
10.3 Messages extending one time period . 52
10.3.1 Method of measurement . 52
– 4 – 62287-1ã IEC:2010+A1:2013(E)
10.3.2 Required results . 52
10.4 Channel selection . 52
10.4.1 Valid channels . 52
10.4.2 Invalid channels . 52
10.5 Internal GNSS receiver . 52
10.6 AIS information . 53
10.6.1 Information content . 53
10.6.2 Information update rates . 54
10.7 Initialisation period . 55
10.7.1 Method of measurement .
...
IEC 62287-1 ®
Edition 2.0 2010-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Maritime navigation and radiocommunication equipment and systems – Class B
shipborne equipment of the automatic identification system (AIS) –
Part 1: Carrier-sense time division multiple access (CSTDMA) techniques
Matériels et systèmes de navigation et de radiocommunication maritimes –
Transpondeur embarqué du système d'identification automatique (AIS) de
classe B –
Partie 1: Technique d'accès multiple par répartition dans le temps avec écoute
de porteuse (CSTDMA)
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
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et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
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IEC 62287-1 ®
Edition 2.0 2010-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Maritime navigation and radiocommunication equipment and systems – Class B
shipborne equipment of the automatic identification system (AIS) –
Part 1: Carrier-sense time division multiple access (CSTDMA) techniques
Matériels et systèmes de navigation et de radiocommunication maritimes –
Transpondeur embarqué du système d'identification automatique (AIS) de
classe B –
Partie 1: Technique d'accès multiple par répartition dans le temps avec écoute
de porteuse (CSTDMA)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 47.020.70 ISBN 978-2-8322-3109-8
– 2 – IEC 62287-1:2010 IEC 2010
CONTENTS
FO R EW O RD . 7
1 Sc op e . . 9
2 Normative references . 9
3 Abbreviations . 10
4 General requirem ents . 11
4.1 General . 11
4.1.1 Capabilities of the Class B“CS” AIS . 11
4.1.2 Quality assurance . 12
4.1.3 Safety of operation . 12
4.1.4 Additional features. 12
4.1.5 Modes of operation . 12
4.2 Manuals . 13
4.3 Marking and identification . 13
5 Environmental, power supply, interference and safety requirements . 13
6 Performance requirements . 14
6.1 Composition . 14
6.2 Operating frequency channels . 14
6.3 GNSS receiver for position reporting . 14
6.4 Id e nt if ic at i o n . 15
6.5 AIS information . 15
6.5.1 Information content . 15
6.5.2 Information reporting intervals . 16
6.5.3 Permissible initialisation period . 17
6.6 Alarms and indications, fall-back arrang em en ts . 17
6.6.1 Integrity and protection . 17
6.6.2 Transmitter shutdown procedure. 17
6.6.3 Position sensor fallback conditions . 17
6.6.4 SOG/COG sensor fallback conditions . 19
6.7 User interface . 19
6.7.1 Indicators and display . 19
6.7.2 Static data input . 19
6.7.3 External in t erf ac es . 19
6.8 Protection from invalid control commands . 19
7 Technical requirements . 20
7.1 General . 20
7.2 Physical layer . 20
7.2.1 General . 20
7.2.2 Transceiver characteristics . 21
7.2.3 Transmitter requirements . 22
7.2.4 Receiver requirements . 22
7.3 Link layer . 23
7.3.1 General . 23
7.3.2 Link sublayer 1: Medium access control (MAC) . 23
7.3.3 Link sublayer 2: Data Link Service (DLS) . 26
7.3.4 Link sublayer 3: Link management entity (LME) . 30
7.4 Network layer . 39
7.4.1 General . 39
7.4.2 Dual channel operation . 39
7.4.3 Channel management . 40
7.4.4 Distribution of transmission packets. 40
7.4.5 Data link congestion resolution . 40
7.5 Transport layer . 40
7.5.1 General . 40
7.5.2 Transmission packets . 41
7.5.3 Sequencing of data packets . 41
7.6 Digital selective calling (DSC) . 41
8 Test conditions . 41
8.1 General . 41
8.2 Normal and extreme test conditions. 41
8.2.1 Normal test conditions . 41
8.2.2 Extreme test conditions . 41
8.3 Test signals . 41
8.3.1 Standard test signal number 1 . 42
8.3.2 Standard test signal number 2 .
...
IEC 62287-1 ®
Edition 2.1 2013-04
CONSOLIDATED
VERSION
VERSION
CONSOLIDÉE
colour
inside
Maritime navigation and radiocommunication equipment and systems – Class B
shipborne equipment of the automatic identification system (AIS) –
Part 1: Carrier-sense time division multiple access (CSTDMA) techniques
Matériels et systèmes de navigation et de radiocommunication maritimes –
Transpondeur embarqué du système d'identification automatique (AIS) de
classe B –
Partie 1: Technique d'accès multiple par répartition dans le temps avec écoute
de porteuse (CSTDMA)
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
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IEC 62287-1 ®
Edition 2.1 2013-04
CONSOLIDATED
VERSION
VERSION
CONSOLIDÉE
colour
inside
Maritime navigation and radiocommunication equipment and systems – Class B
shipborne equipment of the automatic identification system (AIS) –
Part 1: Carrier-sense time division multiple access (CSTDMA) techniques
Matériels et systèmes de navigation et de radiocommunication maritimes –
Transpondeur embarqué du système d'identification automatique (AIS) de
classe B –
Partie 1: Technique d'accès multiple par répartition dans le temps avec écoute
de porteuse (CSTDMA)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 47.020.70 ISBN 978-2-8322-3131-9
IEC 62287-1 ®
Edition 2.1 2013-04
REDLINE VERSION
VERSION REDLINE
colour
inside
Maritime navigation and radiocommunication equipment and systems – Class B
shipborne equipment of the automatic identification system (AIS) –
Part 1: Carrier-sense time division multiple access (CSTDMA) techniques
Matériels et systèmes de navigation et de radiocommunication maritimes –
Transpondeur embarqué du système d'identification automatique (AIS) de
classe B –
Partie 1: Technique d'accès multiple par répartition dans le temps avec écoute
de porteuse (CSTDMA)
– 2 – IEC 62287-1:2010+AMD1:2013 CSV
IEC 2013
CONTENTS
FO R EW O RD . 8
INTRODUCTION to Amendment 1 . 10
1 Sc op e . 11
2 Normative references . 11
3 Abbreviations . 12
4 General requirem ents . 13
4.1 General . 13
4.1.1 Capabilities of the Class B“CS” AIS . 13
4.1.2 Quality assurance . 14
4.1.3 Safety of operation . 14
4.1.4 Additional features. 14
4.1.5 Modes of operation . 14
4.2 Manuals . 15
4.3 Marking and identification . 15
5 Environmental, power supply, interference and safety requirements . 15
6 Performance requirements . 16
6.1 Composition . 16
6.2 Operating frequency channels . 16
6.3 GNSS receiver for position reporting . 16
6.4 Id e nt if ic at i o n . 17
6.5 AIS information . 17
6.5.1 Information content . 17
6.5.2 Information reporting intervals . 18
6.5.3 Permissible initialisation period . 19
6.6 Alarms and indications, fall-back arrang em en ts . 19
6.6.1 Integrity and protection . 19
6.6.2 Transmitter shutdown procedure. 19
6.6.3 Position sensor fallback conditions . 19
6.6.4 SOG/COG sensor fallback conditions . 21
6.7 User interface . 21
6.7.1 Indicators and display . 21
6.7.2 Static data input . 21
6.7.3 External in t erf ac es . 21
6.8 Protection from invalid control commands . 21
7 Technical requirements . 22
7.1 General . 22
7.2 Physical layer . 22
7.2.1 General . 22
7.2.2 Transceiver characteristics . 23
7.2.3 Transmitter requirements . 24
7.2.4 Receiver requirements . 24
7.3 Link layer . 25
7.3.1 General . 25
7.3.2 Link sublayer 1: Medium access control (MAC) . 25
7.3.3 Link sublayer 2: Data Link Service (DLS) . 28
IEC 2013
7.3.4 Link sublayer 3: Link management entity (LME) . 32
7.4 Network layer . 41
7.4.1 General . 41
7.4.2 Dual channel operation . 41
7.4.3 Channel management . 42
7.4.4 Distribution of transmission packets. 42
7.4.5 Data link congestion resolution . 42
7.5 Transport layer . 42
7.5.1 General . 42
7.5.2 Transmission packets . 43
7.5.3 Sequencing of data packets . 43
7.6 Digital selective calling (DSC) . 43
8 Test conditions .
...
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