ISO 21111-5:2020

INTERNATIONAL ISO
STANDARD 21111-5
First edition
2020-06
Road vehicles — In-vehicle Ethernet —
Part 5:
Optical 1-Gbit/s physical layer system
requirements and test plans
Véhicules routiers — Ethernet embarqué —
Partie 5: Exigences et plans de test du système de couche physique à
1-Gbit/s optique
Reference number
©
ISO 2020
© ISO 2020
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ii © ISO 2020 – All rights reserved

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 2
4 Symbols and abbreviated terms . 3
4.1 Symbols . 3
4.2 Abbreviated terms . 3
5 Physical layer system requirements and interoperability test setups requirements .4
5.1 General . 4
5.2 GEPOF link status requirements . 5
5.2.1 IOP_GEPOF_REQ_LINK_STATUS_1 . 5
5.2.2 IOP_GEPOF_REQ_LINK_STATUS_2 . 5
5.3 GEPOF link-up requirements . 5
5.3.1 IOP_GEPOF_REQ_LINK_UP_1 . 5
5.3.2 IOP_GEPOF_REQ_LINK_UP_2 . 5
5.3.3 IOP_GEPOF_REQ_LINK_UP_3 . 5
5.3.4 IOP_GEPOF_REQ_LINK_UP_4 . 6
5.3.5 IOP_GEPOF_REQ_LINK_UP_5 . 6
5.4 Channel quality requirements . 6
5.4.1 IOP_GEPOF_REQ_CH_QLTY_1 . 6
5.4.2 IOP_GEPOF_REQ_CH_QLTY_2 . 6
5.5 Communication reliability under climatic loads requirements . 6
5.5.1 IOP_GEPOF_REQ_RELIABILITY_TEMP_1 . 6
5.5.2 IOP_GEPOF_REQ_RELIABILITY_TEMP_2 . 7
5.5.3 IOP_GEPOF_REQ_RELIABILITY_TEMP_3 . 7
5.5.4 IOP_GEPOF_REQ_RELIABILITY_TEMP_4 . 7
5.5.5 IOP_GEPOF_REQ_RELIABILITY_TEMP_5 . 7
5.5.6 IOP_GEPOF_REQ_RELIABILITY_TEMP_6 . 8
5.5.7 IOP_GEPOF_REQ_RELIABILITY_TEMP_7 . 8
5.5.8 IOP_GEPOF_REQ_RELIABILITY_TEMP_8 . 8
5.5.9 IOP_GEPOF_REQ_RELIABILITY_TEMP_9 . 8
5.5.10 IOP_GEPOF_REQ_RELIABILITY_TEMP_10 . 9
5.6 Test set-up requirements . 9
5.6.1 General. 9
5.6.2 Channel requirements . . 9
5.6.3 Device and LP requirements for interoperability test plan .11
6 Interoperability test plan set-ups .13
6.1 General .13
6.2 Interoperability test set-up 1 . .13
6.3 Interoperability test set-up 2 . .14
6.4 Interoperability test set-up 3 . .15
6.5 Interoperability test set-up 4 . .16
7 Interoperability test plan .17
7.1 General .17
7.2 High attenuation channel with climatic load .18
7.3 Low attenuation channel with climatic load .23
7.4 Link status time .25
7.5 Channel quality .28
8 Device-level physical layer conformance test set-ups requirements .30
8.1 General .30
8.2 Test set-up requirements .30
8.2.1 IUT requirements for device-level physical layer conformance test plan .30
8.2.2 GEPOF entity stress test tool requirements .32
9 Device-level physical layer conformance test plan set-ups .33
9.1 General .33
9.2 Device-level physical layer conformance test set-up 1 .33
9.3 Device-level physical layer conformance test set-up 2 .34
9.4 Device-level physical layer conformance test set-up 3 .35
10 Device-level physical layer conformance test plan .36
10.1 General .36
10.2 High attenuation channel .37
10.3 Low attenuation channel .43
10.4 Optical IUT transmitter measurements .49
10.5 Wake-up and synchronized link sleep .58
10.5.1 General test cases .58
10.5.2 Device with multiple physical entities test cases.66
Bibliography .73
iv © ISO 2020 – All rights reserved

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 31,
Data communication.
A list of all parts in the ISO 21111 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
Introduction
The ISO 21111 series includes in-vehicle Ethernet requirements and test plans that are disseminated in
other International Standards and complements them with additional test methods and requirements.
The resulting requirement and test plans are structured in different documents following the Open
Systems Interconnection (OSI) reference model and grouping the documents that depend on the
physical media and bit rate used.
In general, the Ethernet requirements are specified in ISO/IEC/IEEE 8802-3. The ISO 21111 series
provides supplemental specifications (e.g. wake-up, I/O functionality), which are required for in-vehicle
Ethernet applications. In road vehicles, Ethernet networks are used for different purposes requiring
different bit-rates. Currently, the ISO 21111 series specifies the 1-Gbit/s optical and 100-Mbit/s
electrical physical layer.
The ISO 21111 series contains requirement specifications and test methods related to the in-vehicle
Ethernet. This includes requirement specifications for physical layer entity (e.g. connectors, physical
layer implementations) providers, device (e.g. electronic control units, gateway units) suppliers, and
system (e.g. network systems) designers. Additionally, there are test methods specified for conformance
testing and for interoperability testing.
Safety (electrical safety, protection, fire, etc.) and electromagnetic compatibility (EMC) requirements
are out of the scope of the ISO 21111 series.
The structure of the specifications given in the ISO 21111 series complies with the Open Systems
[1] [3]
Interconnection (OSI) reference model specified in ISO/IEC 7498-1 and ISO/IEC 10731 .
ISO 21111-1 defines the terms which are used in this series of standards and provides an overview of
the standards for in-vehicle Ethernet including the complementary relations to ISO/IEC/IEEE 8802-3,
the document structure, type of physical entities, in-vehicle Ethernet specific functionalities and so on.
ISO 21111-2 specifies the interface between reconciliation sublayer and physical entity including
reduced gigabit media independent interface (RGMII), and the common physical entity wake-up and
synchronized link sleep functionalities, independent from physical media and bit rate.
ISO 21111-3 specifies supplemental requirements to a physical layer capable of transmitting
1-Gbit/s over plastic optical fibre compliant with ISO/IEC/IEEE 8802-3, with specific application to
communications inside road vehicles, and a test plan for physical entity conformance testing.
ISO 21111-4 specifies the optical components requirements and test methods for 1-Gbit/s optical in-
vehicle Ethernet.
This document specifies, for 1-Gbit/s optical in-vehicle Ethernet, requirements on the physical layer at
system level, requirements on the interoperability test set-ups, the interoperability test plan that checks
the requirements for the physical layer at system level, requirements on the device-level physical layer
conformance test set-ups, and device-level physical layer conformance test plan that checks a set of
requirements for the OSI physical layer that are relevant for device vendors.
ISO 21111-6 specifies advanced features of an ISO/IEC/IEEE 8802-3 in-vehicle Ethernet physical layer
(often also called transceiver), e.g. for diagnostic purposes for in-vehicle Ethernet physical layers. It
specifies advanced physical layer features, wake-up and sleep features, physical layer test suite,
physical layer control requirements and conformance test plan, physical sublayers test suite and
physical sublayers requirements and conformance test plan.
ISO 21111-7 specifies the implementation for ISO/IEC/IEEE 8802-3:2017/Amd 1:2017, which defines
the interface implementation for automotive applications together with requirements on components
used to realize this Bus Interface Network (BIN). ISO 21111-7 also defines further testing and system
requirements for systems implemented according to the system specification. In addition, ISO 21111-7
defines the channels for tests of transceivers with a test wiring harness that simulates various electrical
communication channels.
vi © ISO 2020 – All rights reserved

ISO 21111-8 specifies the transmission media, the channel performance and the tests for
ISO/IEC/IEEE 8802-3 in-vehicle Ethernet.
ISO 21111-9 specifies the data link layer requirements and conformance test plan. It specifies the
requirements and test plan for devices and systems with bridge functionality.
ISO 21111-10 specifies the application to network layer requirements and test plan. It specifies the
requirements and test plan for devices and systems that include functionality related with OSI layers
from 3 to 7.
Figure 1 shows the parts of the ISO 21111 series and the document structure.
Figure 1 — In-vehicle Ethernet document reference according to OSI model
INTERNATIONAL STANDARD ISO 21111-5:2020(E)
Road vehicles — In-vehicle Ethernet —
Part 5:
Optical 1-Gbit/s physical layer system requirements and
test plans
1 Scope
This document specifies:
— requirements on the physical layer at system level,
— requirements on the interoperability test set-ups,
— interoperability test plan that checks the requirements for the physical layer at system level,
— requirements on the device-level physical layer conformance test set-ups, and
— device-level physical layer conformance test plan that checks a set of requirements for the OSI
physical layer that are relevant for device vendors.
The interoperability test plan checks the physical layer system requirements specified in this document
and in ISO/IEC/IEEE 8802-3:2017/Amd 9.
This test plan is structured in four different test groups, attending to the kind of system requirements
that covers:
— link status, that includes the tests that check the status of the link by using the content of the
available registers and its accuracy with the real status of the link,
— link-up, that includes the tests that check the time that the IUT reaches a reliable link status from
certain state,
— channel quality, that includes the tests that check the quality of the optical channel by using the
content of the available registers and its accuracy with the real quality of the optical channel, and
— wake-up and sleep, that include tests that check that the transmission and reception of the wake-up
and sleep events.
The device-level conformance test plan checks the device-level requirements specified in the
ISO 21111 series and in ISO/IEC/IEEE 8802-3:2017/Amd 9.
This test plan is structured in four different test groups, attending to the test set-up required:
— high-attenuation channel,
— low-attenuation channel,
— optical IUT transmitter measurements, and
— wake-up and synchronised link sleep.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
1)
ISO 21111-1 , Road vehicles — In-vehicle Ethernet — Part 1: General information and definitions
2)
ISO 21111-2 , Road vehicles —In-vehicle Ethernet — Part 2: Common medium-independent interface
specifications
ISO 21111-3, Road vehicles — In-vehicle Ethernet — Part 3: Optical 1-Gbit/s physical layer specification and
conformance test plan
ISO 21111-4, Road vehicles — In-vehicle Ethernet — Part 4: Optical 1-Gbit/s component requirements and
test methods
ISO/IEC/IEEE 8802-3, Standard for Ethernet
ISO/IEC/IEEE 8802-3:2017/Amd 9:2018, Physical Layer Specifications and Management Parameters for
1000 Mb/s Operation over Plastic Optical Fiber
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO/IEC/IEEE 8802-3, ISO 21111-1
and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
network system
two or more devices connected bi-directionally through a physical medium
Note 1 to entry: Physical medium is defined in ISO 7498-1:1994.
3.2
GEPOF link status
reliability or unreliability of the bidirectional communication between two GEPOF physical entities as
signalled by bit 2 of MDIO register 1.1 specified in ISO/IEC/IEEE 8802-3:2017/Amd 9
3.3
device-level physical layer conformance test plan
set of conformance test cases that covers physical layer requirements relevant for the device provider
3.4
cable plug
POF cable plug that fulfils the specification in ISO 21111-4
3.5
cable socket
POF cable socket that fulfils the specification in ISO 21111-4
1) Under preparation. Stage at the time of publication: ISO/DIS 21111-1:2020.
2) Under preparation. Stage at the time of publication: ISO/DIS 21111-2:2020.
2 © ISO 2020 – All rights reserved

3.6
in-line connector
connector resulting of the match of a cable plug (3.4) and a cable socket (3.5)
4 Symbols and abbreviated terms
4.1 Symbols
For the purposes of this document, the symbols of ISO 21111-1 and the following apply.
IDD device current consumption
device
IDD minimum device current consumption in operation
min
IDD maximum device current consumption in operation
max
IDD_DIS minimum device current consumption in sleep power state
min
IDD_DIS maximum device current consumption in sleep power state
max
T climatic chamber temperature
T device climatic chamber temperature
device
T link partner climatic chamber temperature
LP
T minimum operating temperature
min
T maximum operating temperature
max
T typical operating temperature
typ
U supply voltage
U device supply voltage
device
U link partner supply voltage
LP
U minimum supply voltage
min
U maximum supply voltage
max
U typical supply voltage
typ
4.2 Abbreviated terms
For the purposes of this document, the abbreviated terms of ISO 21111-1 and the following apply.
AOP average optical power
ER extinction ratio
GESST GEPOF entity stress test tool
IUT implementation under test
LP link partner
LT lower tester
POF plastic optical fibre
RIN relative intensity noise
RMS root mean square
TC test coordinator
UT upper tester
5 Physical layer system requirements and interoperability test setups
requirements
5.1 General
Clause 5 specifies the physical layer system requirements and the interoperability test setup
requirements.
The physical layer system requirements are structured by the functionality that they cover:
— The GEPOF link status comprises the physical layer system requirements related with the time and
accuracy the network system signals a new status in the GEPOF link (see 5.2),
— The GEPOF link-up time comprises the physical layer system requirements related with the time
the network system signals a reliable GEPOF link status from a given initial power state of the two
physical entities involved in the GEPOF link (see 5.3),
— The channel quality comprises the physical layer system requirements related with the time and
accuracy the network system signals a change of the channel quality in the GEPOF link (see 5.4),
— The communication reliability comprises the physical layer system requirements related with the
communication reliability when the devices in the network system are under certain climatic loads
and the communication channel is set (see 5.5).
The reference network system used to specify the physical layer system requirements is shown in
Figure 2.
Figure 2 — Reference network system for physical layer system requirements definition
The interoperability test set-ups requirements are specified in 5.6. They include requirements on the
channels that are used in the test set-ups and requirements on the device and LP used in the test set-ups.
4 © ISO 2020 – All rights reserved

5.2 GEPOF link status requirements
5.2.1 IOP_GEPOF_REQ_LINK_STATUS_1
REQ 1.1 PHY — IOP_GEPOF_REQ_LINK_STATUS_1
The time measured from the instant when the GEPOF link status changes to "bidirectional reliable
link is established" till the reception of the first Ethernet frame in the device shall be lower than
0,5 ms when Ethernet frames are sent continuously from the LP.
5.2.2 IOP_GEPOF_REQ_LINK_STATUS_2
REQ 1.2 PHY — IOP_GEPOF_REQ_LINK_STATUS_2
The time measured from the instant when the GEPOF link becomes unreliable till the GEPOF link
status changes to "bidirectional unreliable link" shall be lower than 5 ms.
5.3 GEPOF link-up requirements
5.3.1 IOP_GEPOF_REQ_LINK_UP_1
REQ 1.3 PHY — IOP_GEPOF_REQ_LINK_UP_1
The time measured from the instant when the GEPOF entity 1 receives a PHY_WakeUp.request from
the data link layer as specified in ISO 21111-2 till the GEPOF link status in GEPOF entity changes to
"bidirectional reliable link is established" shall be lower than 100 ms.
The initial power state of the GEPOF entity in device 1 and its LP to measure this time shall be Sleep
as defined in ISO 21111-2.
5.3.2 IOP_GEPOF_REQ_LINK_UP_2
REQ 1.4 PHY — IOP_GEPOF_REQ_LINK_UP_2
The time measured from the instant when the GEPOF entity 1 receives a WakeUp_request event as
specified in ISO 21111-2 till the GEPOF link status in GEPOF entity 1 changes to "bidirectional reliable
link is established" shall be lower than 100 ms.
The initial power state of the GEPOF entity 1 to measure this time shall be Sleep as defined in
ISO 21111-2.
The initial power state of the LP to measure this time shall be Normal as defined in ISO 21111-2.
5.3.3 IOP_GEPOF_REQ_LINK_UP_3
REQ 1.5 PHY — IOP_GEPOF_REQ_LINK_UP_3
The time measured from the instant when the GEPOF entity 1 is reset till the GEPOF link status in
GEPOF entity 1 changes to "bidirectional reliable link is established" shall be lower than 100 ms.
The initial power state of the GEPOF entity 1 to measure this time shall be Normal as defined in
ISO 21111-2.
The initial power state of the LP to measure this time shall be Normal as defined in ISO 21111-2.
5.3.4 IOP_GEPOF_REQ_LINK_UP_4
REQ 1.6 PHY — IOP_GEPOF_REQ_LINK_UP_4
The time measured from the instant when the LP is reset till the GEPOF link status in GEPOF entity 1
changes to "bidirectional reliable link is established" shall be lower than 100 ms.
The initial power state of the GEPOF entity 1 to measure this time shall be Normal as defined in
ISO 21111-2.
The initial power state of the LP to measure this time shall be Normal as defined in ISO 21111-2.
5.3.5 IOP_GEPOF_REQ_LINK_UP_5
REQ 1.7 PHY — IOP_GEPOF_REQ_LINK_UP_5
The time measured from the instant when the GEPOF entity 1 receives a WakeUp_request event as
specified in ISO 21111-2 till the GEPOF link status in GEPOF entity 1 changes to "bidirectional reliable
link is established" shall be lower than 100 ms.
The initial power state of the GEPOF entity 1 to measure this time shall be Normal as defined in
ISO 21111-2.
The initial power state of the LP to measure this time shall be Normal as defined in ISO 21111-2.
5.4 Channel quality requirements
5.4.1 IOP_GEPOF_REQ_CH_QLTY_1
REQ 1.8 PHY — IOP_GEPOF_REQ_CH_QLTY_1
The GEPOF entity 1 shall indicate the channel quality decrease for a channel with decreasing quality.
5.4.2 IOP_GEPOF_REQ_CH_QLTY_2
REQ 1.9 PHY — IOP_GEPOF_REQ_CH_QLTY_2
The GEPOF entity 1 shall indicate the channel quality increase for a channel with increasing quality.
5.5 Communication reliability under climatic loads requirements
5.5.1 IOP_GEPOF_REQ_RELIABILITY_TEMP_1
REQ 1.10 PHY — IOP_GEPOF_REQ_RELIABILITY_TEMP_1
The communication between GEPOF entity 1 and its LP shall be reliable as specified in
ISO/IEC/IEEE 8802-3:2017/Amd 9 when:
— the device that includes the GEPOF entity 1 is located in an oven with temperature set to T ,
max
— the LP is located in an oven with temperature set to T , and
min
— the communication channel between them is set as bidirectional high attenuation as specified in
REQ 1.20 and REQ 1.21.
6 © ISO 2020 – All rights reserved

5.5.2 IOP_GEPOF_REQ_RELIABILITY_TEMP_2
REQ 1.11 PHY — IOP_GEPOF_REQ_RELIABILITY_TEMP_2
The communication between GEPOF entity 1 and its LP shall be reliable as specified in
ISO/IEC/IEEE 8802-3:2017/Amd 9 when:
— the device that includes the GEPOF entity 1 is located in an oven with temperature set to T ,
min
— the LP is located in an oven with temperature set to T , and
max
— the communication channel between them is set as bidirectional high attenuation as specified in
REQ 1.20 and REQ 1.21.
5.5.3 IOP_GEPOF_REQ_RELIABILITY_TEMP_3
REQ 1.12 PHY — IOP_GEPOF_REQ_RELIABILITY_TEMP_3
The communication between GEPOF entity 1 and its LP shall be reliable as specified in
ISO/IEC/IEEE 8802-3:2017/Amd 9 when:
— the device that includes the GEPOF entity 1 is located in an oven with temperature set to T ,
min
— the LP is located in an oven with temperature set to T , and
min
— the communication channel between them is set as bidirectional high attenuation as specified in
REQ 1.20 and REQ 1.21.
5.5.4 IOP_GEPOF_REQ_RELIABILITY_TEMP_4
REQ 1.13 PHY — IOP_GEPOF_REQ_RELIABILITY_TEMP_4
The communication between GEPOF entity 1 and its LP shall be reliable as specified in
ISO/IEC/IEEE 8802-3:2017/Amd 9 when:
— the device that includes the GEPOF entity 1 is located in an oven with temperature set to T ,
max
— the LP is located in an oven with temperature set to T , and
max
— the communication channel between them is set as bidirectional high attenuation as specified in
REQ 1.20 and REQ 1.21.
5.5.5 IOP_GEPOF_REQ_RELIABILITY_TEMP_5
REQ 1.14 PHY — IOP_GEPOF_REQ_RELIABILITY_TEMP_5
The communication between GEPOF entity 1 and its LP shall be reliable as specified in
ISO/IEC/IEEE 8802-3:2017/Amd 9 when:
— the device that includes the GEPOF entity 1 is located in an oven with temperature set to T ,
max
— the LP is located in an oven with temperature set to T , and
min
— the communication channel between them is set as bidirectional low attenuation as specified in
REQ 1.22 and REQ 1.23.
5.5.6 IOP_GEPOF_REQ_RELIABILITY_TEMP_6
REQ 1.15 PHY — IOP_GEPOF_REQ_RELIABILITY_TEMP_6
The communication between GEPOF entity 1 and its LP shall be reliable as specified in
ISO/IEC/IEEE 8802-3:2017/Amd 9 when:
— the device that includes the GEPOF entity 1 is located in an oven with temperature set to T ,
min
— the LP is located in an oven with temperature set to T , and
max
— the communication channel between them is set as bidirectional low attenuation as specified in
REQ 1.22 and REQ 1.23.
5.5.7 IOP_GEPOF_REQ_RELIABILITY_TEMP_7
REQ 1.16 PHY — IOP_GEPOF_REQ_RELIABILITY_TEMP_7
The communication between GEPOF entity 1 and its LP shall be reliable as specified in
ISO/IEC/IEEE 8802-3:2017/Amd 9 when:
— the device that includes the GEPOF entity 1 is located in an oven with temperature set to T ,
min
— the LP is located in an oven with temperature set to T , and
min
— the communication channel between them is set as bidirectional low attenuation as specified in
REQ 1.22 and REQ 1.23.
5.5.8 IOP_GEPOF_REQ_RELIABILITY_TEMP_8
REQ 1.17 PHY — IOP_GEPOF_REQ_RELIABILITY_TEMP_8
The communication between GEPOF entity 1 and its LP shall be reliable as specified in
ISO/IEC/IEEE 8802-3:2017/Amd 9 when:
— the device that includes the GEPOF entity 1 is located in an oven with temperature set to T ,
max
— the LP is located in an oven with temperature set to T , and
max
— the communication channel between them is set as bidirectional low attenuation as specified in
REQ 1.22 and REQ 1.23.
5.5.9 IOP_GEPOF_REQ_RELIABILITY_TEMP_9
REQ 1.18 PHY — IOP_GEPOF_REQ_RELIABILITY_TEMP_9
The communication between GEPOF entity 1 and its LP shall be reliable as specified in
ISO/IEC/IEEE 8802-3:2017/Amd 9 when:
— the device that includes the GEPOF entity 1 is located in an oven with temperature set to T ,
device
— the LP is located in an oven with temperature set to T ,
LP
— the communication channel between them is set as bidirectional high attenuation as specified in
REQ 1.20 and REQ 1.21,
— the initial temperature of T is equal to T and is increased linearly till it reaches T in
device min max
30 min, and
— the initial temperature of T is equal to T and is decreased linearly till it reaches T in 30 min.
LP max min
8 © ISO 2020 – All rights reserved

5.5.10 IOP_GEPOF_REQ_RELIABILITY_TEMP_10
REQ 1.19 PHY — IOP_GEPOF_REQ_RELIABILITY_TEMP_10
The communication between GEPOF entity 1 and its LP shall be reliable as specified in
ISO/IEC/IEEE 8802-3:2017/Amd 9 when:
— the device that includes the GEPOF entity 1 is located in an oven with temperature set to T ,
device
— the LP is located in an oven with temperature set to T ,
LP
— the communication channel between them is set as bidirectional low attenuation as specified in
REQ 1.22 and REQ 1.23,
— the initial temperature of T is equal to T and is increased linearly till it reaches T in
device min max
30 min, and
— the initial temperature of T is equal to T and is decreased linearly till it reaches T in 30 min.
LP max min
5.6 Test set-up requirements
5.6.1 General
5.6 specifies the requirements of the test set-ups that are used in the interoperability test plan.
Most of the test set-ups involve a communication channel between a device and its LP. Different types of
communication channels are specified in 5.6 and examples of realization are given.
The requirements on the device and LP for the test set-ups are specified in 5.6.3.
5.6.2 Channel requirements
5.6.2.1 Bidirectional high attenuation channel
5.6.2.1.1 Bidirectional high attenuation channel requirements
REQ 1.20 PHY — Bidirectional high attenuation channel requirement — Bidirectional chan-
nel structure
The bidirectional high attenuation channel type shall be composed of two unidirectional high
attenuation channels. Each of the unidirectional high attenuation channels shall comply with
REQ 1.21.
REQ 1.21 PHY — Bidirectional high attenuation channel requirement — Unidirectional
channel requirements
The unidirectional high attenuation channel shall have an insertion loss measured at 0 Hz between
6 dB and 7 dB.
The normalized frequency response of the unidirectional high attenuation channel shall be between
the normalized frequency response specified in ISO/IEC/IEEE 8802-3:2017/Amd 9 for channel
type III and 0,2 dB more for the frequency range from 0 MHz to 162,5 MHz.
The insertion loss and transfer function requirement shall be fulfilled at (23 ± 2) °C.
5.6.2.1.2 Example for bidirectional high attenuation channel implementation.
Figure 3 shows an example for a bidirectional high attenuation channel implementation. The simplex
POF cable, in-line connector and cable plug fulfil the requirements given in ISO 21111-4. The two-
parallel simplex POF cables can be substituted by a single duplex POF cable.
Key
1 in-line connector
2 3-m simplex POF cable
3 cable plug
Figure 3 — Example for bidirectional high attenuation channel implementation
5.6.2.2 Bidirectional low attenuation channel
5.6.2.2.1 Bidirectional low attenuation channel requirements
REQ 1.22 PHY — Bidirectional low attenuation channel requirement — Bidirectional chan-
nel structure
The bidirectional low attenuation channel type shall be composed of two unidirectional low
attenuation channels. Each of the unidirectional low attenuation channels shall comply with
REQ 1.23.
REQ 1.23 PHY — Bidirectional low attenuation channel requirement — Unidirectional chan-
nel requirements
The unidirectional low attenuation channel type shall have an insertion loss measured at 0 Hz
between 2,5 dB and 3 dB.
The lower limit for transfer function magnitude shall be −0,25 dB for the frequency range from 0 Hz
to 160 MHz.
The upper limit for transfer function magnitude shall be 0 dB for the frequency range from 0 Hz to
160 MHz.
The insertion loss and transfer function requirement shall be fulfilled at (23 ± 2) °C.
5.6.2.2.2 Example for bidirectional low attenuation channel implementation
Figure 4 shows an example for a bidirectional low attenuation channel implementation. The simplex
POF cable and cable plug fulfil the requirements given in ISO 21111-4. The two-parallel simplex POF
cables can be substituted by a single duplex POF cable.
Key
1 0,5-m simplex POF cable
2 cable plug
Figure 4 — Example for bidirectional low attenuation channel implementation
10 © ISO 2020 – All rights reserved

5.6.2.3 Variable attenuation channel
5.6.2.3.1 Variable attenuation channel requirements
REQ 1.24 PHY — Variable attenuation channel requirements — Bidirectional channel
structure
The variable attenuation channel type shall be composed of one unidirectional variable attenuation
channel that shall comply with REQ 1.25 and one unidirectional low attenuation channel that shall
comply with REQ 1.23.
The unidirectional variable attenuation channel shall connect the upper-left and upper-right ports of
the variable attenuation channel.
The unidirectional low attenuation channel shall connect the lower-left and lower-right ports of the
variable attenuation channel.
REQ 1.25 PHY — Variable attenuation channel requirements — Unidirectional channel
requirements
The variable attenuation channel type shall have an insertion loss measured at 0 Hz programmable
between 3 dB and 10 dB.
The lower limit for transfer function magnitude shall be the requirement specified in
ISO/IEC/IEEE 8802-3:2017/Amd 9 for channel type III for the frequency range from 0 Hz to 160 MHz.
The upper limit for transfer function magnitude shall be 0 dB for the frequency range from 0 Hz to
160 MHz.
The insertion loss and transfer function requirement shall be fulfilled at (23 ± 2) °C and for all the
programmable insertion loss measured at 0 Hz.
5.6.2.3.2 Example for variable attenuation channel implementation
Figure 5 shows an example for a variable attenuation channel implementation. The simplex POF cable
and cable plug fulfil the requirements given in ISO 21111-4. Note that the unidirectional variable
attenuation channel is implemented only in one communication direction.
5.6.3 Device and LP requirements for interoperability test plan
REQ 1.26 PHY — Device and LP requirements for interoperability test plan — GEPOF entities
requirements
Each of the GEPOF entities in the device and LP shall fulfil the requirements in
ISO 21111-3 and ISO/IEC/IEEE 8802-3:2017/Amd 9.

REQ 1.27 PHY — Device and LP requirements for interoperability test plan — MDIO interface
The device and the LP shall include at least one accessible MDIO interface as specified in
ISO/IEC/IEEE 8802-3 that allows the individual access to each set of MDIO registers of each GEPOF
entity in the device or LP.
REQ 1.28 PHY — Device and LP requirements for interoperability test plan — Access and
control of PHY service interface and neighbour service interface
If the device or the LP implements the wake-up and synchronized link sleep functionality as
specified in ISO 21111-3, it shall include a way to access and control PHY service interface
and neighbour service interface, as specified in ISO 21111-2.

REQ 1.29 PHY — Device and LP requirements for interoperability test plan — Ethernet
interface
The device and the LP shall include at least one Ethernet physical layer capable of 1 Gbit/s in addition
to the one provided by the GEPOF entity.
The link status has two possible states:
— "bidirectional reliable link is established" when the MDIO register 1.1 is equal to 1 , and
— "bidirectional unreliable link" when the MDIO register 1.1 is equal to 0 .
REQ 1.30 PHY — Device and LP requirements for interoperability test plan — Access to
link status
The device shall include constant access to the MDIO register 1.1 that contains the current link status.

REQ 1.31 PHY — Device and LP requirements for interoperability test plan —
PMD_TXPWR.request(tx_pwr) control
The device and the LP shall include a mechanism to control the generation of the request
PMD_TXPWR.request(tx_pwr) with a controlled value of the tx_pwr parameter as specified in
ISO/IEEE/IEC 8802-3:2017/Amd 9:2018, 115.6.1.3.

Key
1 0,5-m simplex POF cable
2 cable plug
3 optical variable
...