SIST EN 303 215 V1.5.1:2025

EUROPEAN STANDARD
Environmental Engineering (EE);
Measurement methods and limits for power consumption in
broadband telecommunication networks equipment

2 ETSI EN 303 215 V1.5.1 (2025-06)

Reference
REN/EE-EEPS71
Keywords
broadband, energy efficiency, power supply
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: +33 4 92 94 42 00  Fax: +33 4 93 65 47 16

Siret N° 348 623 562 00017 - APE 7112B
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° w061004871

Important notice
The present document can be downloaded from the
ETSI Search & Browse Standards application.
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format on ETSI deliver repository.
Users should be aware that the present document may be revised or have its status changed,
this information is available in the Milestones listing.
If you find errors in the present document, please send your comments to
the relevant service listed under Committee Support Staff.
If you find a security vulnerability in the present document, please report it through our
Coordinated Vulnerability Disclosure (CVD) program.
Notice of disclaimer & limitation of liability
The information provided in the present deliverable is directed solely to professionals who have the appropriate degree of
experience to understand and interpret its content in accordance with generally accepted engineering or
other professional standard and applicable regulations.
No recommendation as to products and services or vendors is made or should be implied.
In no event shall ETSI be held liable for loss of profits or any other incidental or consequential damages.

Any software contained in this deliverable is provided "AS IS" with no warranties, express or implied, including but not
limited to, the warranties of merchantability, fitness for a particular purpose and non-infringement of intellectual property
rights and ETSI shall not be held liable in any event for any damages whatsoever (including, without limitation, damages
for loss of profits, business interruption, loss of information, or any other pecuniary loss) arising out of or related to the use
of or inability to use the software.
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2025.
All rights reserved.
ETSI
3 ETSI EN 303 215 V1.5.1 (2025-06)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 4
Executive summary . 4
1 Scope . 5
2 References . 5
2.1 Normative references . 5
2.2 Informative references . 6
3 Definition of terms, symbols and abbreviations . 6
3.1 Terms . 6
3.2 Symbols . 7
3.3 Abbreviations . 7
4 Definition of power consumption . 8
4.1 Definition of power consumption per port of broadband network equipment . 8
4.2 Power consumption taking into account the low-power states . 8
5 Measurement methods . 9
5.0 Description . 9
5.1 General requirements . 9
5.1.1 Measurement conditions . 9
5.1.2 Measurement instruments requirements . 10
5.1.3 Considered equipment . 10
5.1.4 Not considered equipment . 10
5.1.5 Measurement reference points . 11
5.1.6 Traffic profile . 11
5.2 Measurement method for DSLAM/MSAN equipment . 12
5.2.0 General . 12
5.2.1 Equipment configuration . 13
5.2.2 Reference measurement method . 14
5.3 Measurement method for OLT equipment . 15
5.3.1 Equipment configuration . 15
5.3.2 Reference measurement method . 17
5.4 Alternative measurement method . 18
5.5 Reporting of the measurements . 19
Annex A (informative): Example hourly traffic distribution profiles . 20
Annex B (informative): NPC definition and calculation examples . 21
Annex C (informative): Measurement power consumption for DSLAM/MSAN and OLT
equipment for different number of active ports . 22
Annex D (informative): Example application of alternative methodology . 23
Annex E (informative): Change history . 24
History . 25

ETSI
4 ETSI EN 303 215 V1.5.1 (2025-06)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are publicly available for ETSI members and non-members, and can be
found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to
ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the
ETSI IPR online database.
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not
referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become,
essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its
Members. 3GPP™, LTE™ and 5G™ logo are trademarks of ETSI registered for the benefit of its Members and of the
3GPP Organizational Partners. oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and of ®
the oneM2M Partners. GSM and the GSM logo are trademarks registered and owned by the GSM Association.
Foreword
This European Standard (EN) has been produced by ETSI Technical Committee Environmental Engineering (EE).

National transposition dates
Date of adoption of this EN: 30 April 2025
Date of latest announcement of this EN (doa): 31 July 2025
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 January 2026
Date of withdrawal of any conflicting National Standard (dow): 31 January 2026

Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
Executive summary
The present document defines the energy consumption metrics and measurement methods for fixed broadband
telecommunication network equipment.
ETSI
5 ETSI EN 303 215 V1.5.1 (2025-06)
1 Scope
The present document defines the power consumption metrics, the methodology and the test conditions to measure the
power consumption of broadband fixed telecommunication networks equipment. The present document does not cover
all possible configuration of equipment but only homogenous configurations.
The types of broadband access technologies covered by the present document are the ones widely deployed at the date
of publication. Currently, the present document considers DSLAM DSL, MSAN, PON OLT and Point to Point OLT
equipment. Other access technologies may be included in further versions of the present document.
The present document also considers measurement methodology for VDSL2 equipment with vectoring functionality.
In addition to the full power state, power-saving states as defined in DSL standards [i.1] and [i.2] are also covered.
The present document focuses on Network Equipment. The end-user equipment is handled in other documents, see
ETSI EN 301 575 [i.6] for CPE [i.6] and ETSI EN 303 423 [i.9] for network standby.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found in the
ETSI docbox.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] ETSI TS 101 388: "Access Terminals Transmission and Multiplexing (ATTM); Access
transmission systems on metallic access cables; Asymmetric Digital Subscriber Line
(ADSL) - European specific requirements [ITU-T Recommendation G.992.1 modified]".
[2] ETSI EN 300 132-2: "Environmental Engineering (EE); Power supply interface at the input to
telecommunications and datacom (ICT) equipment; Part 2: Operated by -48 V direct current (dc)".
[3] ETSI TS 101 271 (V1.1.1): "Access Terminals Transmission and Multiplexing (ATTM); Access
transmission system on metallic pairs; Very High Speed digital subscriber line system (VDSL2);
[ITU-T Recommendation G.993.2 modified]".
[4] Void.
[5] ETSI ES 201 970: "Access and Terminals (AT); Public Switched Telephone Network (PSTN);
Harmonized specification of physical and electrical characteristics at a 2-wire analogue presented
Network Termination Point (NTP)".
[6] Recommendation ITU-T G.984.1: "Gigabit-capable passive optical networks (GPON)".
[7] Recommendation ITU-T G.984.2: "Gigabit-capable Passive Optical Networks (G-PON): Physical
Media Dependent (PMD) layer specification".
[8] IEEE 802.3™: "IEEE Standard for Information technology - Telecommunications and information
exchange between systems - Local and metropolitan area networks - Specific
requirements - Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD)
Access Method and Physical Layer Specifications".
[9] Broadband Forum oneM2M TR-100: "ADSL2/ADSL2plus; Performance Test Plan".
ETSI
6 ETSI EN 303 215 V1.5.1 (2025-06)
[10] Broadband Forum oneM2M TR-114: "VDSL2 Performance Test Plan".
[11] Recommendation ITU-T G.9807.1: "10-Gigabit-capable symmetric passive optical networks
(XGS-PON)".
[12] Recommendation ITU-T G.9804.3: "50-Gigabit-capable passive optical networks (50G-PON):
Physical media dependent (PMD) layer specification".
[13] 25GS-PON Specification Version 3.0 (November 2023): "25 Gigabit Symmetric Passive Optical
Network".
[14] Recommendation ITU-T G.9805: "Coexistence of passive optical network systems".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long-term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] Recommendation ITU-T G.992.3 (2009): "Asymmetric digital subscriber line transceivers 2
(ADSL2)".
[i.2] Recommendation ITU-T G.992.5 (2010): "Asymmetric Digital Subscriber Line (ADSL)
transceivers - Extended bandwidth ADSL2 (ADSL2plus)".
[i.3] Recommendation ITU-T G.993.2 (2015): "Very high speed digital subscriber line 2 (VDSL2)".
[i.4] ETSI TR 102 530: "Environmental Engineering (EE); The reduction of energy consumption in
telecommunications equipment and related infrastructure".
[i.5] Broadband Forum oneM2M TR-202: "ADSL2/ADSL2plus Low-Power Mode Guidelines".
[i.6] ETSI EN 301 575: "Environmental Engineering (EE); Measurement method for energy
consumption of Customer Premises Equipment (CPE)".
[i.7] IEC 60050: "International Electrotechnical Vocabulary - Electrical and electronic measurements
and measuring instruments - Part 311: General terms relating to measurements - Part 312: General
terms relating to electrical measurements - Part 313: Types of electrical measuring
instruments - Part 314: Specific terms according to the type of instrument".
[i.8] IEC 62018: "Power consumption of information technology equipment - Measurement methods".
[i.9] ETSI EN 303 423: "Environmental Engineering (EE); Electrical and electronic household and office
equipment; Measurement of networked standby power consumption of Interconnecting equipment".
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms apply:
accuracy (of a measuring instrument): quality which characterizes the ability of a measuring instrument to provide an
indicated value close to a true value of the measurand
NOTE 1: This term is used in the "true value" approach.
ETSI
7 ETSI EN 303 215 V1.5.1 (2025-06)
NOTE 2: Accuracy is all the better when the indicated value is closer to the corresponding true value.
NOTE 3: See IEC 60050 [i.7], definition (311-06-08).
active line: line in operational mode and carrying traffic as specified for that mode of operation (ADSL2plus or
VDSL2)
broadband telecommunication network equipment: equipment of broadband technology that is part of a
telecommunication network
broadband terminal equipment: equipment of broadband technology that is connected beyond the Network
Termination Point of a telecommunication network
full-power state: state in which the maximal allowed data transmission is possible
NOTE: The maximum is defined by the physical properties of the line and the settings of the operator (e.g. L0 for
ADSL2/2plus).
low-power state: state in which a limited power reduction capability and a limited data transmission is allowed
NOTE: It is entered automatically from the full power state after the data transmission during a certain time is
lower than the limit. If more than the limited data has to be transmitted from either side a state change to
the full power state is entered automatically. The low power state may comprise multiple sub-states with
history dependant state transition rules (e.g. L2 for ADSL2/2plus).
power consumption: power used by a device to achieve an intended application performance
stand-by state: state in which the largest power reduction capability and no transmission of data is possible
NOTE: From this state a direct state change to the full-transmission state is possible, if data has to be transmitted
from either side (e.g. L3 for ADSL2/2plus).
telecommunication network: network operated under a license granted by a national telecommunications authority,
which provides telecommunications between Network Termination Points (NTPs) (i.e. excluding terminal equipment
beyond the NTPs)
3.2 Symbols
Void.
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
25GS-PON 25-Gigabit Symmetric Passive Optical Network
50G-PON 50-Gigabit Passive Optical Network
AC Alternative Current
ADSL Asymmetric Digital Subscriber Line
ADSL2plus Second generation ADSL with extended bandwidth
BBF BroadBand Forum
CPE Customer Premises Equipment
DBA Dynamic Bandwidth Allocation
DC Directive Current
DPBO Downstream Power Back-Off
DS Downstream
DSL Digital Subscriber Line
DSLAM Digital Subscriber Line Access Multiplexer
DSM Dynamic Spectrum Management
FAN Fibre Access Node (Network)
GPON Gigabit Passive Optical Network
IP Internet Protocol
LAN Local Area Network
LSW LAN Switch
ETSI
8 ETSI EN 303 215 V1.5.1 (2025-06)
LT Line Termination
MAC Media Access Control
MELT MEtallic Loop Test
MIMO Multiple Input Multiple Output
MPLS MultiProtocol Label Switching
MSAN Multi Service Access Node
NPC Normalized Power Consumption
NT Network Termination
NTP Network Termination Point
ODN Optical Distribution Network
OLT Optical Line Termination
ONU Optical Network Unit
P2P Point to Point
PON Passive Optical Network
POTS Plain Old Telephone Service
QoS Quality of Service
SNR Signal Noise Ratio
SOHO Small Office/Home Office
UPBO Upstream Power Back-Off
US Upstream
VAC Ventilation Air Conditioning
VDSL Very-high-speed Digital Subscriber Line
VDSL2 Second-Generation VDSL
VLAN Virtual Local Area Network
WAN Wide Area Network
XGS-PON 10-Gigabit Symmetric Passive Optical Network
4 Definition of power consumption
4.1 Definition of power consumption per port of broadband
network equipment
The power consumption of broadband telecommunication network equipment is defined as:
P = P / N
BBport BBeq ports
Where:
PBBeq is the power consumption (in W) of a fully equipped broadband network equipment, measured at the electric
power input interface, placed at the premises of the operator or the equipment supplier, which connects multiple
broadband subscribers to a backbone. P is measured in determined environmental conditions defined in clause 5.1.1.
BBeq
P is the power consumption per port in W of the broadband network equipment for which the limits are defined in
BBport
the present document.
N is the maximum number of subscriber lines access ports served by the broadband network equipment under test.
ports
4.2 Power consumption taking into account the low-power
states
The low-power states are intended to reduce the power consumption during periods of no or minimal traffic needs
(e.g. low data-rate applications or control signalling only). When these low-power states are used, the achievable power
consumption reduction can be estimated by using profiles based on user traffic assumptions, some examples of user
hourly traffic as illustrated in annex A.
NOTE 1: Example of power-saving states usage:
ETSI
9 ETSI EN 303 215 V1.5.1 (2025-06)
A number of power-saving states are defined in the DSL standards (L2, L3, Recommendations
ITU-T G.992.3 [i.1] and G.992.5 [i.2]). These power-saving states are implemented, both in the Network
equipment (i.e. the subject of the present document) and the CPE/end-user equipment deployed at the
premises of the user of the broadband line; this will enable the operator to use these to further limit the
power consumption of the equipment. Further study is required to optimize the way in which the
low-power states are controlled. In particular, to determine the levels of interference that might arise due
to the fluctuating crosstalk caused by frequent multi-state power transitions.
It is important to notice that it is only possible for GPON to use stand-by state if all ONU are in stand-by
state and not individually as possible for Point-to-Point transmission.
NOTE 2: Additional power saving solutions. A number of additional power-saving solutions are available. Some of
these are listed below. However, the list is not complete and both the developers and users of broadband
network equipment are encouraged to investigate and introduce new power saving solutions:
 Politeness algorithms.
 Dynamic Spectrum Management.
 Boards optimized for remote applications (reduced line power).
 Dynamic power saving for unused components such as line card, chipset, port, etc.
5 Measurement methods
5.0 Description
This clause describes the methods to measure the power consumption of broadband network equipment and also gives
the conditions under which these measurements shall be performed.
5.1 General requirements
5.1.1 Measurement conditions
The power measurements shall be performed in a laboratory environment under the following conditions:
• Room Temperature: 25 °C ± 2 °C.
• Room Relative Humidity: 30 % to 75 %.
• Operating voltage:
- DC Powered Equipment: According to ETSI EN 300 132-2 [2], -54,5 V ± 1,5 V for nominal voltage
of -48 V DC powered equipment. Equipment using voltage other than -48 V DC shall be tested at ± 1 %
of the nominal voltage.
- AC Powered Equipment: 230 V ± 1 % for nominal voltage of 230 V AC and frequency 50 Hz ± 1 %.
ETSI
10 ETSI EN 303 215 V1.5.1 (2025-06)
• Minimum Measurement Duration: Equipment shall be allowed to stabilize to get stable power measurement. If
power varies over the measurement interval time, an average of measurement shall be calculated:
- For DSLAM equipment, wait 1 minute to settle bitswap after entering L0 mode. After entering L2 mode,
wait one more minute after achieving the final trimmed power level.
- For OLT equipment, wait till OLT and the connected ONUs have finished ranging and Dynamic
Bandwidth Allocation (DBA). The DBA will ensure that any unused bandwidth on a specific GPON port
is allocated to the ONUs connected to it.
5.1.2 Measurement instruments requirements
All measurement instruments used should be calibrated by counterpart national metrology institute and within
calibration due date:
• Power Source: Power sources used to provide power to the equipment under test shall be capable of providing
a minimum of 1,5 times the power rating of the equipment under test.
• Input power:
- Resolution: ≤ 10 mA; ≤ 100 mV; ≤ 100 mW
- DC current: ± 1 %
- DC voltage: ± 1 %
- AC power: ± 1 %:
 An available current crest factor of 5 or more.
 The test instrument shall have a bandwidth of at least 1 kHz.
NOTE 1: Measurement equipment with higher digitizing rates and higher accuracy may be desirable to ensure
accurate measurement.
NOTE 2: Additional information on accuracy can be found in IEC 62018 [i.8].
5.1.3 Considered equipment
The following items are considered part of the broadband network equipment and therefore their power consumption
shall be taken into account to get the total power consumption (P ) of the broadband network equipment:
BBeq
• Network Termination, providing one or more (up)links to the Core or Backhaul Network.
NOTE: The actual number of links should reflect the normal resilience practice for that type of equipment.
Furthermore, all uplink ports should carry test traffic averaged or approximatively averaged.
• Line Termination, providing a number of DSL, POTS, PON or Point-to-Point ports connected to the Customer
Premises Equipment through metallic lines or optical fibres.
• Backplane, if present, that interconnects the different boards, if present, of the broadband network equipment.
• Cooling system (e.g. fans drawer inside the broadband system).
• Normally operational power-supply unit.
5.1.4 Not considered equipment
The following items are not considered part of the broadband network equipment and therefore their power
consumption shall not be added to the power consumption of the broadband network equipment:
• External rectifier (AC-DC converter).
• Room or outdoor Cabinet Ventilation and Air Conditioning Unit (VAC Unit).
ETSI
11 ETSI EN 303 215 V1.5.1 (2025-06)
• Auxiliary or redundant power unit.
• Battery.
• For DSLAM equipment, Additional External signal processing (Dynamic Spectrum Management (DSM) and
Multiple Input Multiple Output (MIMO) techniques if not implemented as part of Line Termination).
For Line Termination which has more than the bare DSL functionality but has additional functions (e.g. MELT,
vectoring, test access and channel bonding, etc.), the Line Termination is to be used in normal DSL mode of operation
with such additional functions disabled. Optionally a measurement with these functions enabled can be
described/requested. In case such additional functions cannot be fully disabled, manufacturer will declare what is the
extra power budget due to the added functionality. Such extra budget will not be considered in P .
BBport
5.1.5 Measurement reference points

Core
Enclosure
DC1
...

SLOVENSKI STANDARD
01-julij-2025
Okoljski inženiring (EE) - Merilne metode in mejne vrednosti za porabo električne
energije v opremi za širokopasovna telekomunikacijska omrežja
Environmental Engineering (EE) - Measurement methods and limits for power
consumption in broadband telecommunication networks equipment
Ta slovenski standard je istoveten z: ETSI EN 303 215 V1.5.1 (2025-06)
ICS:
19.040 Preskušanje v zvezi z Environmental testing
okoljem
33.040.01 Telekomunikacijski sistemi Telecommunication systems
na splošno in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
Environmental Engineering (EE);
Measurement methods and limits for power consumption in
broadband telecommunication networks equipment

2 ETSI EN 303 215 V1.5.1 (2025-06)

Reference
REN/EE-EEPS71
Keywords
broadband, energy efficiency, power supply
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: +33 4 92 94 42 00  Fax: +33 4 93 65 47 16

Siret N° 348 623 562 00017 - APE 7112B
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° w061004871

Important notice
The present document can be downloaded from the
ETSI Search & Browse Standards application.
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format on ETSI deliver repository.
Users should be aware that the present document may be revised or have its status changed,
this information is available in the Milestones listing.
If you find errors in the present document, please send your comments to
the relevant service listed under Committee Support Staff.
If you find a security vulnerability in the present document, please report it through our
Coordinated Vulnerability Disclosure (CVD) program.
Notice of disclaimer & limitation of liability
The information provided in the present deliverable is directed solely to professionals who have the appropriate degree of
experience to understand and interpret its content in accordance with generally accepted engineering or
other professional standard and applicable regulations.
No recommendation as to products and services or vendors is made or should be implied.
In no event shall ETSI be held liable for loss of profits or any other incidental or consequential damages.

Any software contained in this deliverable is provided "AS IS" with no warranties, express or implied, including but not
limited to, the warranties of merchantability, fitness for a particular purpose and non-infringement of intellectual property
rights and ETSI shall not be held liable in any event for any damages whatsoever (including, without limitation, damages
for loss of profits, business interruption, loss of information, or any other pecuniary loss) arising out of or related to the use
of or inability to use the software.
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2025.
All rights reserved.
ETSI
3 ETSI EN 303 215 V1.5.1 (2025-06)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 4
Executive summary . 4
1 Scope . 5
2 References . 5
2.1 Normative references . 5
2.2 Informative references . 6
3 Definition of terms, symbols and abbreviations . 6
3.1 Terms . 6
3.2 Symbols . 7
3.3 Abbreviations . 7
4 Definition of power consumption . 8
4.1 Definition of power consumption per port of broadband network equipment . 8
4.2 Power consumption taking into account the low-power states . 8
5 Measurement methods . 9
5.0 Description . 9
5.1 General requirements . 9
5.1.1 Measurement conditions . 9
5.1.2 Measurement instruments requirements . 10
5.1.3 Considered equipment . 10
5.1.4 Not considered equipment . 10
5.1.5 Measurement reference points . 11
5.1.6 Traffic profile . 11
5.2 Measurement method for DSLAM/MSAN equipment . 12
5.2.0 General . 12
5.2.1 Equipment configuration . 13
5.2.2 Reference measurement method . 14
5.3 Measurement method for OLT equipment . 15
5.3.1 Equipment configuration . 15
5.3.2 Reference measurement method . 17
5.4 Alternative measurement method . 18
5.5 Reporting of the measurements . 19
Annex A (informative): Example hourly traffic distribution profiles . 20
Annex B (informative): NPC definition and calculation examples . 21
Annex C (informative): Measurement power consumption for DSLAM/MSAN and OLT
equipment for different number of active ports . 22
Annex D (informative): Example application of alternative methodology . 23
Annex E (informative): Change history . 24
History . 25

ETSI
4 ETSI EN 303 215 V1.5.1 (2025-06)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are publicly available for ETSI members and non-members, and can be
found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to
ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the
ETSI IPR online database.
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not
referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become,
essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its
Members. 3GPP™, LTE™ and 5G™ logo are trademarks of ETSI registered for the benefit of its Members and of the
3GPP Organizational Partners. oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and of ®
the oneM2M Partners. GSM and the GSM logo are trademarks registered and owned by the GSM Association.
Foreword
This European Standard (EN) has been produced by ETSI Technical Committee Environmental Engineering (EE).

National transposition dates
Date of adoption of this EN: 30 April 2025
Date of latest announcement of this EN (doa): 31 July 2025
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 January 2026
Date of withdrawal of any conflicting National Standard (dow): 31 January 2026

Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
Executive summary
The present document defines the energy consumption metrics and measurement methods for fixed broadband
telecommunication network equipment.
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5 ETSI EN 303 215 V1.5.1 (2025-06)
1 Scope
The present document defines the power consumption metrics, the methodology and the test conditions to measure the
power consumption of broadband fixed telecommunication networks equipment. The present document does not cover
all possible configuration of equipment but only homogenous configurations.
The types of broadband access technologies covered by the present document are the ones widely deployed at the date
of publication. Currently, the present document considers DSLAM DSL, MSAN, PON OLT and Point to Point OLT
equipment. Other access technologies may be included in further versions of the present document.
The present document also considers measurement methodology for VDSL2 equipment with vectoring functionality.
In addition to the full power state, power-saving states as defined in DSL standards [i.1] and [i.2] are also covered.
The present document focuses on Network Equipment. The end-user equipment is handled in other documents, see
ETSI EN 301 575 [i.6] for CPE [i.6] and ETSI EN 303 423 [i.9] for network standby.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found in the
ETSI docbox.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] ETSI TS 101 388: "Access Terminals Transmission and Multiplexing (ATTM); Access
transmission systems on metallic access cables; Asymmetric Digital Subscriber Line
(ADSL) - European specific requirements [ITU-T Recommendation G.992.1 modified]".
[2] ETSI EN 300 132-2: "Environmental Engineering (EE); Power supply interface at the input to
telecommunications and datacom (ICT) equipment; Part 2: Operated by -48 V direct current (dc)".
[3] ETSI TS 101 271 (V1.1.1): "Access Terminals Transmission and Multiplexing (ATTM); Access
transmission system on metallic pairs; Very High Speed digital subscriber line system (VDSL2);
[ITU-T Recommendation G.993.2 modified]".
[4] Void.
[5] ETSI ES 201 970: "Access and Terminals (AT); Public Switched Telephone Network (PSTN);
Harmonized specification of physical and electrical characteristics at a 2-wire analogue presented
Network Termination Point (NTP)".
[6] Recommendation ITU-T G.984.1: "Gigabit-capable passive optical networks (GPON)".
[7] Recommendation ITU-T G.984.2: "Gigabit-capable Passive Optical Networks (G-PON): Physical
Media Dependent (PMD) layer specification".
[8] IEEE 802.3™: "IEEE Standard for Information technology - Telecommunications and information
exchange between systems - Local and metropolitan area networks - Specific
requirements - Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD)
Access Method and Physical Layer Specifications".
[9] Broadband Forum oneM2M TR-100: "ADSL2/ADSL2plus; Performance Test Plan".
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6 ETSI EN 303 215 V1.5.1 (2025-06)
[10] Broadband Forum oneM2M TR-114: "VDSL2 Performance Test Plan".
[11] Recommendation ITU-T G.9807.1: "10-Gigabit-capable symmetric passive optical networks
(XGS-PON)".
[12] Recommendation ITU-T G.9804.3: "50-Gigabit-capable passive optical networks (50G-PON):
Physical media dependent (PMD) layer specification".
[13] 25GS-PON Specification Version 3.0 (November 2023): "25 Gigabit Symmetric Passive Optical
Network".
[14] Recommendation ITU-T G.9805: "Coexistence of passive optical network systems".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long-term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] Recommendation ITU-T G.992.3 (2009): "Asymmetric digital subscriber line transceivers 2
(ADSL2)".
[i.2] Recommendation ITU-T G.992.5 (2010): "Asymmetric Digital Subscriber Line (ADSL)
transceivers - Extended bandwidth ADSL2 (ADSL2plus)".
[i.3] Recommendation ITU-T G.993.2 (2015): "Very high speed digital subscriber line 2 (VDSL2)".
[i.4] ETSI TR 102 530: "Environmental Engineering (EE); The reduction of energy consumption in
telecommunications equipment and related infrastructure".
[i.5] Broadband Forum oneM2M TR-202: "ADSL2/ADSL2plus Low-Power Mode Guidelines".
[i.6] ETSI EN 301 575: "Environmental Engineering (EE); Measurement method for energy
consumption of Customer Premises Equipment (CPE)".
[i.7] IEC 60050: "International Electrotechnical Vocabulary - Electrical and electronic measurements
and measuring instruments - Part 311: General terms relating to measurements - Part 312: General
terms relating to electrical measurements - Part 313: Types of electrical measuring
instruments - Part 314: Specific terms according to the type of instrument".
[i.8] IEC 62018: "Power consumption of information technology equipment - Measurement methods".
[i.9] ETSI EN 303 423: "Environmental Engineering (EE); Electrical and electronic household and office
equipment; Measurement of networked standby power consumption of Interconnecting equipment".
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms apply:
accuracy (of a measuring instrument): quality which characterizes the ability of a measuring instrument to provide an
indicated value close to a true value of the measurand
NOTE 1: This term is used in the "true value" approach.
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7 ETSI EN 303 215 V1.5.1 (2025-06)
NOTE 2: Accuracy is all the better when the indicated value is closer to the corresponding true value.
NOTE 3: See IEC 60050 [i.7], definition (311-06-08).
active line: line in operational mode and carrying traffic as specified for that mode of operation (ADSL2plus or
VDSL2)
broadband telecommunication network equipment: equipment of broadband technology that is part of a
telecommunication network
broadband terminal equipment: equipment of broadband technology that is connected beyond the Network
Termination Point of a telecommunication network
full-power state: state in which the maximal allowed data transmission is possible
NOTE: The maximum is defined by the physical properties of the line and the settings of the operator (e.g. L0 for
ADSL2/2plus).
low-power state: state in which a limited power reduction capability and a limited data transmission is allowed
NOTE: It is entered automatically from the full power state after the data transmission during a certain time is
lower than the limit. If more than the limited data has to be transmitted from either side a state change to
the full power state is entered automatically. The low power state may comprise multiple sub-states with
history dependant state transition rules (e.g. L2 for ADSL2/2plus).
power consumption: power used by a device to achieve an intended application performance
stand-by state: state in which the largest power reduction capability and no transmission of data is possible
NOTE: From this state a direct state change to the full-transmission state is possible, if data has to be transmitted
from either side (e.g. L3 for ADSL2/2plus).
telecommunication network: network operated under a license granted by a national telecommunications authority,
which provides telecommunications between Network Termination Points (NTPs) (i.e. excluding terminal equipment
beyond the NTPs)
3.2 Symbols
Void.
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
25GS-PON 25-Gigabit Symmetric Passive Optical Network
50G-PON 50-Gigabit Passive Optical Network
AC Alternative Current
ADSL Asymmetric Digital Subscriber Line
ADSL2plus Second generation ADSL with extended bandwidth
BBF BroadBand Forum
CPE Customer Premises Equipment
DBA Dynamic Bandwidth Allocation
DC Directive Current
DPBO Downstream Power Back-Off
DS Downstream
DSL Digital Subscriber Line
DSLAM Digital Subscriber Line Access Multiplexer
DSM Dynamic Spectrum Management
FAN Fibre Access Node (Network)
GPON Gigabit Passive Optical Network
IP Internet Protocol
LAN Local Area Network
LSW LAN Switch
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LT Line Termination
MAC Media Access Control
MELT MEtallic Loop Test
MIMO Multiple Input Multiple Output
MPLS MultiProtocol Label Switching
MSAN Multi Service Access Node
NPC Normalized Power Consumption
NT Network Termination
NTP Network Termination Point
ODN Optical Distribution Network
OLT Optical Line Termination
ONU Optical Network Unit
P2P Point to Point
PON Passive Optical Network
POTS Plain Old Telephone Service
QoS Quality of Service
SNR Signal Noise Ratio
SOHO Small Office/Home Office
UPBO Upstream Power Back-Off
US Upstream
VAC Ventilation Air Conditioning
VDSL Very-high-speed Digital Subscriber Line
VDSL2 Second-Generation VDSL
VLAN Virtual Local Area Network
WAN Wide Area Network
XGS-PON 10-Gigabit Symmetric Passive Optical Network
4 Definition of power consumption
4.1 Definition of power consumption per port of broadband
network equipment
The power consumption of broadband telecommunication network equipment is defined as:
P = P / N
BBport BBeq ports
Where:
PBBeq is the power consumption (in W) of a fully equipped broadband network equipment, measured at the electric
power input interface, placed at the premises of the operator or the equipment supplier, which connects multiple
broadband subscribers to a backbone. P is measured in determined environmental conditions defined in clause 5.1.1.
BBeq
P is the power consumption per port in W of the broadband network equipment for which the limits are defined in
BBport
the present document.
N is the maximum number of subscriber lines access ports served by the broadband network equipment under test.
ports
4.2 Power consumption taking into account the low-power
states
The low-power states are intended to reduce the power consumption during periods of no or minimal traffic needs
(e.g. low data-rate applications or control signalling only). When these low-power states are used, the achievable power
consumption reduction can be estimated by using profiles based on user traffic assumptions, some examples of user
hourly traffic as illustrated in annex A.
NOTE 1: Example of power-saving states usage:
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A number of power-saving states are defined in the DSL standards (L2, L3, Recommendations
ITU-T G.992.3 [i.1] and G.992.5 [i.2]). These power-saving states are implemented, both in the Network
equipment (i.e. the subject of the present document) and the CPE/end-user equipment deployed at the
premises of the user of the broadband line; this will enable the operator to use these to further limit the
power consumption of the equipment. Further study is required to optimize the way in which the
low-power states are controlled. In particular, to determine the levels of interference that might arise due
to the fluctuating crosstalk caused by frequent multi-state power transitions.
It is important to notice that it is only possible for GPON to use stand-by state if all ONU are in stand-by
state and not individually as possible for Point-to-Point transmission.
NOTE 2: Additional power saving solutions. A number of additional power-saving solutions are available. Some of
these are listed below. However, the list is not complete and both the developers and users of broadband
network equipment are encouraged to investigate and introduce new power saving solutions:
 Politeness algorithms.
 Dynamic Spectrum Management.
 Boards optimized for remote applications (reduced line power).
 Dynamic power saving for unused components such as line card, chipset, port, etc.
5 Measurement methods
5.0 Description
This clause describes the methods to measure the power consumption of broadband network equipment and also gives
the conditions under which these measurements shall be performed.
5.1 General requirements
5.1.1 Measurement conditions
The power measurements shall be performed in a laboratory environment under the following conditions:
• Room Temperature: 25 °C ± 2 °C.
• Room Relative Humidity: 30 % to 75 %.
• Operating voltage:
- DC Powered Equipment: According to ETSI EN 300 132-2 [2], -54,5 V ± 1,5 V for nominal voltage
of -48 V DC powered equipment. Equipment using voltage other than -48 V DC shall be tested at ± 1 %
of the nominal voltage.
- AC Powered Equipment: 230 V ± 1 % for nominal voltage of 230 V AC and frequency 50 Hz ± 1 %.
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• Minimum Measurement Duration: Equipment shall be allowed to stabilize to get stable power measurement. If
power varies over the measurement interval time, an average of measurement shall be calculated:
- For DSLAM equipment, wait 1 minute to settle bitswap after entering L0 mode. After entering L2 mode,
wait one more minute after achieving the final trimmed power level.
- For OLT equipment, wait till OLT and the connected ONUs have finished ranging and Dynamic
Bandwidth Allocation (DBA). The DBA will ensure that any unused bandwidth on a specific GPON port
is allocated to the ONUs connected to it.
5.1.2 Measurement instruments requirements
All measurement instruments used should be calibrated by counterpart national metrology institute and within
calibration due date:
• Power Source: Power sources used to provide power to the equipment under test shall be capable of providing
a minimum of 1,5 times the power rating of the equipment under test.
• Input power:
- Resolution: ≤ 10 mA; ≤ 100 mV; ≤ 100 mW
- DC current: ± 1 %
- DC voltage: ± 1 %
- AC power: ± 1 %:
 An available current crest factor of 5 or more.
 The test instrument shall have a bandwidth of at least 1 kHz.
NOTE 1: Measurement equipment with higher digitizing rates and higher accuracy may be desirable to ensure
accurate measurement.
NOTE 2: Additional information on accuracy can be found in IEC 62018 [i.8].
5.1.3 Considered equipment
The following items are considered part of the broadband network equipment and therefore their power consumption
shall be taken into account to get the total power consumption (P ) of the broadband network equipment:
BBeq
• Network Termination, providing one or more (up)links to the Core or Backhaul Network.
NOTE: The actual number of links should reflect the normal resilience practice for that type of equipment.
Furthermore, all uplink ports should carry test traffic averaged or approximatively averaged.
• Line Termination, providing a number of DSL, POTS, PON or Point-to-Point ports connected to the Customer
Premises Equipment through metallic lines or optical fibres.
• Backplane, if present, that interconnects the different boards, if present, of the broadband network equipment.
• Cooling system (e.g. fans drawer inside the broadband system).
• Normally operational power-supply unit.
5.1.4 Not considered equipment
The following items are not considered part of the broadband network equipment and therefore their power
consumption shall not be added to the power consumption of the broadband network equipment:
• External rectifier (AC-DC converter).
• Room or outdoor Cabinet Ventilation and Air Conditioning Unit (VAC Unit).
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• Auxiliary or redundant power unit.
• Battery.
• For DSLAM equipment, Additional External signal processing (Dynamic Spectrum Management (DSM) and
Multiple Input Multiple Output (MIMO) techniques if not implemented as part of Line Termination).
For Line Termination which has more than the bare DSL functionality but has additional functions (e.g. MELT,
vectoring, test access and channel bonding, etc.), the Line Termination is to be used in normal DSL mode of operation
with such a
...