{{ stage }}

ITU {{ doctype }}

•
International Telecommunications Union
ITU-{{bureau}}
{{ docnumber }} {% if edition %}
Revision {{ edition }}
{% endif %}
{{ draftinfo }}
({{ pubdate_monthyear }})
{% if bureau == "T" %}Telecommunication
Standardization Sector
of ITU{% endif %} {% if bureau == "D" %}Telecommunication
Development Sector
of ITU{% endif %} {% if bureau == "R" %}Radiocommunication
Sector of ITU{% endif %}
Series {{ series }} {{ series1 }} {% if series2 %}— {{ series2 }}{% endif %} {{ doctitle }} {% if docsubtitle %}
{{ docsubtitle }} {% endif %}
{% if keywords %}
Keywords: {{ keywords | join ', ' }}
{% endif %}
{{ doctype }} ITU-{{ bureau }} {{ docnumber }}
{% if unpublished %}
Warning for Drafts

This prepublication is an unedited version of a recently approved Recommendation. It will be replaced by the published version after editing. Therefore, there will be differences between this prepublication and the published version.

{% endif %}

© {{ docyear }} ITU.

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from the address below.

International Telecommunication Union

Place des Nations 1211 Geneva 20 Switzerland
itumail@itu.int
www.itu.int