| Rec. No. | Title | Summary | Status | Approval Date |
|
K.83
| Monitoring of electromagnetic field levels | Recommendation ITU-T K.83 gives guidance on how to make long-term measurements for the monitoring of electromagnetic fields (EMF) in the selected areas that are under public concern, in order to show that EMFs are under control and under the limits. The purpose of this Recommendation is to provide the general public, clear and easily available data concerning electromagnetic field levels in the form of results of continuous measurement. | Approved | 2024-01-13 |
|
K.91
| Guidance for assessment, evaluation and monitoring of human exposure to radio frequency electromagnetic fields | There are many possible methods of exposure assessment and each of them has its own advantages and disadvantages. Recommendation ITU-T K.91 gives guidance on how to assess and monitor human exposure to radio frequency (RF) electromagnetic fields (EMFs) in areas with surrounding radiocommunication installations based on existing exposure and compliance standards in the 8.3 kHz to 300 GHz range. This includes procedures for evaluating exposure and how to show compliance with exposure limits with reference to existing standards.
Recommendation ITU-T K.91 is oriented to the examination of the area accessible to people in the real environment of currently operated services with many different sources of RF EMF, but also gives references to standards and Recommendations related to EMF compliance of products.
Recommendation ITU-T K.91 includes an electronic attachment containing an uncertainty calculator and the Watt guard modules. | Approved | 2024-01-13 |
|
K.153
| Guidance on determining the compliance boundaries (exclusion zones) of radio transmitter installations | Exclusion zones are described by the compliance boundaries around radio base stations and transmitting stations in which the electromagnetic fields may exceed the radio frequency electromagnetic field (RF-EMF) exposure limits. The general public shall not have access to those areas. Exclusion zones are also defined for occupational exposure. Those areas are generally positioned on rooftops in urban or suburban locations. Their shape and dimensions may differ depending on the regulations.
Recommendation ITU-T K.153 includes information on how the exclusion zones should be determined based on the data concerning operating frequencies and equivalent isotropically radiated power (EIRP) on each of the operating frequencies. It also includes information on cases in which there are no exclusion zones. For example, on masts, especially in rural areas, there is no need for any materialization as the general public does not have access to this zone and access for workers is also limited and usually exists only in the front of the transmitting antennas. Furthermore, some other transmitters do not need any compliance boundary as the installed power level is so low that they are compliant even when touching the transmitter.
| Approved | 2023-09-06 |
|
K Suppl. 32
| Case studies of radio frequency- electromagnetic field (RF-EMF) assessment | Supplement 32 to ITU-T K-series Recommendations presents results of case studies of radio frequency-electromagnetic field (RF-EMF) exposure levels, including fifth generation (5G) systems, taken in different conditions and areas. All results of EMF exposure assessment were delivered by ITU-T members and include calculations and measurements of the RF-EMF exposure levels in the vicinity of different radio communication systems. RF-EMF exposure levels vary depending on the environment in which they are taken and type of radio communication systems that are in operation.The results included in Supplement 32 to ITU-T K-series Recommendations provide information about RF-EMF exposure levels in real situations. The EMF exposure assessments are included in appendices.Supplement 32 to ITU-T K-series Recommendations aims mainly to resolve the problem of EMF compliance assessments of base station systems through typical case studies including computation evaluation and measurement evaluation, and also provides the case support on implementation of Supplement 16 to ITU-T K-series Recommendations and of IEC 62232. | Approved | 2023-06-23 |
|
K.20
| Resistibility of telecommunication equipment installed in a telecommunication centre to overvoltages and overcurrents | Recommendation ITU-T K.20 specifies resistibility requirements and test procedures for telecommunication equipment that is attached to or installed within a telecommunication centre.
Overvoltages and overcurrents covered by Recommendation ITU-T K.20 include surges due to lightning on or near the line plant, short term induction from adjacent alternating current (AC) power lines or railway systems, earth potential rise due to power faults, direct contact between telecommunication lines and power lines, and electrostatic discharges (ESDs). The sources for overvoltages in internal lines, between equipment or racks, are mainly inductive coupling caused by lightning currents being conducted in nearby lightning strikes or lightning currents being conducted in nearby conductors.
Major changes compared with Recommendation ITU-T K.20 (2017) include:
– DC insulation resistance test;
– revised test exemption for internal short cables;
– renaming of some test titles for clarity;
– screened cable exemptions;
– addition of test 7.10, a twisted pair port transverse/differential test, to Table 7.
| Approved | 2022-11-29 |
|
K Suppl. 16
| Electromagnetic field compliance assessments for 5G wireless networks | Supplement 16 to the ITU-T K-series Recommendations provides guidance on the radio frequency electromagnetic field (RF-EMF) compliance assessment considerations for the International Mobile Telecommunication system (IMT 2020) wireless networks also known as 5th generation of wireless networks (5G). Also, the 5G technical standards have been finalized and commercial 5G networks are now launched in many countries. | Approved | 2022-10-27 |
|
K Suppl. 29
| Electromagnetic field strength inside and outside of electric vehicles using wireless power transfer technology | In the near future, the electric vehicle may become the means of transport used most frequently by the general public. Electromagnetic field (EMF) exposure levels from electric vehicles causes some concern to the general public so they should be assessed for the various types of vehicles.
Supplement 29 to ITU-T K series Recommendations considers a particular electric vehicle using dynamic wireless power transfer (WPT) technology to charge its battery with the power delivered from the coils installed underground. In this case, passengers and drivers may be exposed to an EMF inside and outside the vehicle when it is stationary or moving. In each case, two different EMF measurement protocols need to be applied to evaluate human exposure levels to EMF. This Supplement includes the evaluation results of EMF exposure levels based on exposure limits inside and outside the electric vehicles known by the commercial name of OLEV (on-line electric vehicles) developed in the Republic of Korea. | Approved | 2022-07-01 |
|
K Suppl. 13
| Radiofrequency electromagnetic field (RF-EMF) exposure levels from mobile and portable devices during different conditions of use | Modern mobile devices may be used for many different purposes. There are differences between the ways of using them depending on the service. Also, the exposure to radiofrequency electromagnetic field (RF-EMF) is different depending on the service, environment and the conditions of the use of the mobile devices. Supplement 13 to ITU-T K-series Recommendations describes various factors that determine the level of RF-EMF exposure, as defined by the specific absorption rate (SAR) that is induced in the users of mobile and portable radiocommunication devices. Based on this technical information, practical information and guidance is provided for users of mobile devices. | Approved | 2021-12-10 |
|
K Suppl. 20
| ITU-T K.91 – Supplement on radiofrequency exposure evaluation around underground base stations | Supplement 20 to ITU-T K-series Recommendations contains the measurement and full-wave computation results of radio frequency exposure from underground base stations (BSs), to evaluate the exposure from them.
Measurement and computation methods of human exposure to electromagnetic fields (EMFs) from fixed radio sources like mobile BSs have been standardized and published as ITU T K series Recommendations and IEC 62232. These also include methods prescribed in Japanese regulations and have been basically assumed to be applied to radio sources installed above ground.
Underground BSs for use in small cells of fourth generation (4G) mobile networks are installed underground to construct service areas above ground and also expected to be used for fifth generation (5G) mobile networks.
| Approved | 2021-12-10 |
|
K.52
| Guidance on complying with limits for human exposure to electromagnetic fields | Recommendation ITU-T K.52 aims to help with compliance of telecommunication installations and mobile handsets, or other radiating devices used against the head with safety limits for human exposure to electromagnetic fields (EMFs). It presents general guidance, a calculation method and an installation assessment procedure. The assessment procedure for telecommunication installations, based on safety limits provided by the International Commission on Non-Ionizing Radiation Protection (ICNIRP), helps users determine the likelihood of installation compliance based on accessibility criteria, antenna properties and emitter power. The IEC Standard for the compliance measurement of mobile handsets is recommended.
| Approved | 2021-06-29 |
|
K.100
| Measurement of radio frequency electromagnetic fields to determine compliance with human exposure limits when a base station is put into service | Recommendation ITU-T K.100 provides information on measurement techniques and procedures for assessing compliance with the general public electromagnetic field (EMF) exposure limits when a new base station (BS) is put into service, taking into account effects of the environment and other relevant radio frequency sources present in its surroundings.
| Approved | 2021-06-29 |
|
K Suppl. 1
| ITU-T K.91 – Guide on electromagnetic fields and health | The objective of Supplement 1 to the ITU-T K-series Recommendations is to answer questions commonly posed by the public on the electromagnetic field (EMF) phenomenon and to address related concerns.
This Guide on electromagnetic fields and health aims to:
• Provide electromagnetic field (EMF) information and education resources suitable for all communities, stakeholders and governments.
• Support clarification of the science by referencing the World Health Organization (WHO) and other stakeholders (see NOTE) that provide information that is particularly useful in helping to clarify scientific uncertainties e.g., in the areas of radio frequency (RF) technology, infrastructure implementation, usage and consequential EMF exposure.
NOTE – The primary reference on EMF and health is the World Health Organization (WHO). The primary reference on EMF assessment methods is the International Telecommunication Union (ITU) and the International Electrotechnical Commission (IEC).
| Approved | 2021-05-20 |
|
K.70
| Mitigation techniques to limit human exposure to EMFs in the vicinity of radiocommunication stations | Recommendation ITU-T K.70 defines techniques which may be used by telecommunication operators to evaluate the cumulative (total) exposure ratio in the vicinity of transmitting antennas and to identify the main source of radiation. It offers guidance on mitigation methods which allow reduction of radiation level in order to comply with exposure limits. It also provides guidance on procedures necessary in the environment (on site) in which, in most cases, there is a simultaneous exposure to multiple frequencies from many different sources. Radiating sources may belong to many operators and may represent different radiocommunication services (e.g., cellular systems, trunking systems, broadcasting, radio relays, wireless access, etc.).
Appendix I includes an electronic attachment with distinct 32-bit and 64-bit versions of the EMF estimator software. As Microsoft Access 32-bit and 64-bit versions cannot be served by the same software package, two versions of this software are proposed. Furthermore, two separate install procedures are required in order to run this software depending on the Microsoft Access version installed on the user PC.
| Approved | 2020-12-14 |
|
K.145
| Assessment and management of compliance with radio frequency electromagnetic field exposure limits for workers at radiocommunication sites and facilities | Recommendation ITU-T K.145 includes guidance on the protection of workers against radio frequency electromagnetic fields (RF-EMFs) exposure in their working environments. Radio frequency (RF) workers range from installation engineers and tower climbers to R&D personnel and laboratory testing engineers. All of these RF workers are exposed to stronger RF-EMF fields than the general public. There are also RF informed workers who have been provided with information on RF-EMF safe working practices for a site as well as all other workers who are regarded as members of the public for the purposes of RF-EMF exposure limits. This Recommendation provides minimum general safety guidance for telecommunication RF workers around the world.
| Approved | 2020-12-14 |
|
K Suppl. 14
| The impact of RF-EMF exposure limits stricter than the ICNIRP or IEEE guidelines on 4G and 5G mobile network deployment | Radio frequency electromagnetic field (RF-EMF) exposure limits have become a critical concern for further deployment of wireless networks, especially in countries, regions and even specific cities where RF-EMF limits are significantly stricter than the International Commission for Non-Ionizing Radiation Protection (ICNIRP) or Institute of Electrical and Electronics Engineers (IEEE) guidelines.
This problem currently affects several countries, such as China, India, Poland, Russia, Italy and
Switzerland, regions of Belgium or cities such as Paris.
Supplement 14 to the ITU-T K-series of Recommendations provides an overview of some of the challenges faced by countries, regions and cities that are about to deploy 4G or 5G infrastructures. It provides information on a simulation carried out in Poland of the impact of RF-EMF limits as an example of a wider phenomenon, applicable to several other countries that have set limits stricter than those contained in the ICNIRP or IEEE guidelines.
The results of the simulation indicate that, where RF-EMF limits are stricter than ICNIRP or IEEE guidelines, the network capacity buildout (both 4G and 5G) might be severely constrained and prevent growing data traffic demand and the launching of new services on existing mobile networks being addressed. | Approved | 2019-09-20 |
|
K Suppl. 19
| Electromagnetic field (EMF) strength inside underground railway trains | The electromagnetic field (EMF) environment surrounding underground railway trains is among those most frequently met by the general public in daily life. When an underground railway train passes through a tunnel, especially, passengers are exposed to the EMF radiated by several repeaters installed on the wall. EMF sources are close to passengers under these conditions. Supplement 19 to ITU-T K-series Recommendations reports evaluations of EMF exposure levels in underground railway trains from mobile communication base stations installed in tunnels. | Approved | 2019-09-20 |
|
K Suppl. 9
| 5G technology and human exposure to radiofrequency electromagnetic fields | The deployment of fifth generation (5G) will see the evolution and expansion of existing fourth generation (4G) networks and the introduction of new radio access networks in millimetre wavebands. As a result of the use of much higher frequency ranges, the number of base stations will substantially increase. These networks will include a range of installations including smaller cell deployments and advanced antenna technologies. Massive multiple input multiple output (MIMO) antennas will allow the use of very narrow beams that will follow the user with an impact on the surrounding exposure level different from that of current systems. The number of wireless devices will dramatically increase. New technology allows for the use of more efficient systems that require lower communication signal levels.
Supplement 9 to ITU-T K-series Recommendations contains an analysis of the impact of the implementation of 5G mobile systems with respect to the exposure level of electromagnetic fields (EMFs) around radiocommunication infrastructure. | Approved | 2019-05-22 |
|
K Suppl. 4
| ITU-T K.91 - Electromagnetic field considerations in smart sustainable cities | The content of this Supplement 2 to Recommendation ITU-T K.91 was prepared by the Focus Group on Smart Sustainable Cities (FG-SSC) and updated within Q3/5 sessions during SG5 meeting.
Wireless networks provide vital infrastructure and connection of information and communication technology (ICT) elements that underpin smart sustainable cities. The effective design and careful deployment of wireless networks and short range devices (SRDs) are vital to ensuring electromagnetic field (EMF) compliance and maximum efficiency for ICTs.
Key features of this Supplement are:
a) It details the EMF considerations in smart sustainable cities.
b) It provides guidance on implementation and promotes efficient deployment of wireless networks in smart sustainable cities.
c) It features a 'Smart sustainability city EMF check-list' designed to provide an easy to use reference for city officials and planners to ensure smart city policies operate most efficiently and comply with EMF exposure standards.
d) It references World Health Organization (WHO) materials, International Commission on Non-Ionizing Radiation Protection (ICNIRP) guidelines, ITU-T Recommendations and IEC Standards. It is not intended to replicate the material in all references.
| Approved | 2018-09-21 |
|
K.90
| Evaluation techniques and working procedures for compliance with exposure limits of network operator personnel to power-frequency electromagnetic fields | Recommendation ITU-T K.90 provides evaluation techniques and guidelines for compliance with safety limits for human exposure to electromagnetic fields (EMFs) of telecommunication network personnel (e.g., outside plant craft) at power frequencies (DC, 50 Hz and 60 Hz). This Recommendation does not set safety limits; it seeks to provide techniques and procedures for determining the need for any precautions at the work site.
This Recommendation includes an electronic attachment containing the EMFACDC program.
| Approved | 2018-07-14 |
|
K.61
| Guidance on measurement and numerical prediction of electromagnetic fields for compliance with human exposure limits for telecommunication installations | Recommendation ITU-T K.61 helps telecommunication operators to verify compliance with exposure standards promulgated by local or national authorities. This Recommendation gives guidance on measurement methods that can be used to achieve a compliance assessment. It also provides guidance on the selection of numerical methods suitable for exposure prediction in various situations. | Approved | 2018-01-13 |
|
K.121
| Guidance on the environmental management for compliance with radio frequency EMF limits for radiocommunication base stations | Recommendation ITU-T K.121 gives guidance on how to manage the compliance with RF-EMF limits in areas near to radiocommunication installations and how to establish processes for responding to public concern about exposure to RF-EMF. | Approved | 2016-12-14 |
|
K.122
| Exposure levels in close proximity of radiocommunication antennas | The guidance concerning the exposure levels in close proximity to transmitting antennas is important for safety of the radiocommunication staff operating in such areas.
Recommendation ITU-T K.122 gives information concerning the electric field strength levels that can be expected in close proximity to the broadcasting and radiocommunication antennas so that a comparison with the exposure limits is possible. This is important for maintenance personnel and in some cases also for the general public. In the case of workers it is recommended that affected personnel should be trained by expert staff so that they are able to assess the exposure levels in close proximity of radiocommunication antennas.
There are many possible configurations of transmitting antennas. In this Recommendation the most typical ones are presented, in order to give general information about exposure levels that can be expected during the operation of radiocommunication systems.
| Approved | 2016-12-14 |
|
K.113
| Generation of radiofrequency electromagnetic field level maps | Recommendation ITU-T K.113 provides guidance on how to make radiofrequency electromagnetic field (RF-EMF) maps for assessing existing exposure levels over large areas of cities or territories and for an appropriate public disclosure of the results, in a simple and understandable way. | Approved | 2015-11-29 |
|
K Suppl. 3
| ITU-T K.20, K.21, K.45, K.82 – Additional criteria to protect telecommunication cabling during a power cross event | The objective of Supplement X to the ITU-T K-series Recommendations, Additional criteria to protect telecommunication cabling in the event of a power cross event, is enable the implementation of power cross protection for telecommunications cabling connected to [b-ITU-T K.20], [b-ITU-T K.21] and [b-ITU-T K.45] compliant equipment.
This Additional criteria to protect telecommunication cabling in the event of a power cross event supplement aims to:
• Provide current-time limitations to protect telecommunication cabling from fusing and wire insulation damage.
• Explain the evolution of physical wiring simulators and their drawbacks
• Provide designers with the tools to extrapolate the supplement current-time limitations data to larger and smaller conductor sizes.
| Approved | 2015-10-23 |