IEC 60728-7-2:2003

INTERNATIONAL IEC
STANDARD
60728-7-2
First edition
2003-10
Cable networks for television signals,
sound signals and interactive services –
Part 7-2:
Hybrid Fibre Coax Outside Plant
Status Monitoring –
Media access Control (MAC)
Layer Specification
Reference number
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INTERNATIONAL IEC
STANDARD
60728-7-2
First edition
2003-10
Cable networks for television signals,
sound signals and interactive services –
Part 7-2:
Hybrid Fibre Coax Outside Plant
Status Monitoring –
Media access Control (MAC)
Layer Specification
 IEC 2003  Copyright - all rights reserved
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International Electrotechnical Commission
Международная Электротехническая Комиссия
For price, see current catalogue

– 2 – 60728-7-2  IEC:2003(E)
CONTENTS
FOREWORD . 4
INTRODUCTION .6
1 Scope . 7
2 Normative references. 7
3 Terms, definitions and abbreviations. 8
4 Reference architecture forward and return channel specifications.10
5 Media access control layer specification .10
5.1 Overview .10
5.2 MAC packet transport .11
5.3 MAC packet structure .13
5.4 MAC packet delimiters .18
5.5 MAC protocol data units (PDUs) .18
6 MAC protocol operation .29
6.1 Non-volatile parameters.29
6.2 Duplex capabilities.29
6.3 Packet priorities.29
6.4 Packet reception.29
6.5 NE responses .30
6.6 Message sequence numbers and transaction synchronization .30
6.7 Solicited messages.31
6.8 Autonomous (unsolicited) messages.31
6.9 Return channel transmissions.35
6.10 MAC state machines.35
Annex A (informative) Operational details .38
A.1 Introduction.38
A.2 Time of day.38
A.3 Firmware downloads.38
A.4 NE addressing .38
A.5 Alarm processing HMS MAC protocol .39
A.6 Automatic channel discovery.43
A.7 Auto-registration .44
A.8 Configuration changes and SNMP trap generation .45
Figure 1 – Reference architecture diagram.10
Figure 2 – Bit transmission order.12
Figure 3 – MAC packet structure .13
Figure 4 – MAC header control byte – Bit definition.13
Figure 5 – MAC header sequence byte – Bit definition .16
Figure 6 – MAC PDU structure .18
Figure 7 – STATRESP STATUS byte – Bit definition .20
Figure 8 – Return channel transmission permitted.35

60728-7-2  IEC:2003(E) – 3 –
Figure 9 – Contention state diagram .36
Figure 10 – Backoff state diagram.37
Figure A.1 – Property MIB usage .39
Table 1 – Transponder type classifications. 7
Table 2 – Generic MAC packet structure .13
Table 3 – Protocol field values .14
Table 4 – MAC PDUs .19
Table 5 – Possible MAC protocol transactions.19
Table 6 – NAK PDU format.20
Table 7 – ACK PDU format.20
Table 8 – STATRQST PDU format .20
Table 9 – STATRESP PDU format.20
Table 10 – CHNLRQST bit settings .21
Table 11 – CNTNRM bit settings .21
Table 12 – CNTCUR bit settings.21
Table 13 – MAJOR bit settings .21
Table 14 – MINOR bit settings .22
Table 15 – TALKRQST PDU format.22
Table 16 – TALK PDU format .23
Table 17 – CONTMODE PDU format.23
Table 18 – CONTMODE: MODE settings.23
Table 19 – NE message retrieval example .24
Table 20 – REG_REQ PDU format .25
Table 21 – SET_ADDR PDU format.25
Table 22 – REG_END PDU format .26
Table 23 – REG_END: STATUS settings.26
Table 24 – CHNLDESC PDU format .27
Table 25 – INVCMD PDU format .28
Table 26 – INVCMD: REASON codes.28
Table 27 – TIME PDU format .29
Table 28 – Non-volatile parameters.29
Table 29 – MAC sequence field example (non-contention mode).31
Table 30 – Contention state settings versus forward channel packets .32
Table 31 – Backoff state machine parameters .34
Table A.1 – Properties .40
Table A.2 – Alarm notification and retrieval – Polled mode.42
Table A.3 – Alarm notification and retrieval – Contention mode.43
Table A.4 – Auto-registration implementation example .45

– 4 – 60728-7-2  IEC:2003(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CABLE NETWORKS FOR TELEVISION SIGNALS,
SOUND SIGNALS AND INTERACTIVE SERVICES –
Part 7-2: Hybrid Fibre Coax Outside Plant status monitoring –
Media Access Control (MAC) layer specification
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