Tesis previa a la obtención del Título de Ingeniero en Electrónica y ...

FOREWORD
The CCITT (the International Telegraph and Telephone Consultative Committee) is the permanent organ of
le International Teleconrmunicatión Union (ITU). CCITT is responsible for studying technical, operating and tarüT
uestions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide
asís.
The Plenary Assembly of CCITT which meets every four years, establishes the topics for study and approves
lecommendations prepared by its Study Groups. The approval of Recommendations by the members of CCITT between
leñar}' Assernblies is covered by the procedure laid down in CCITT Resolution No. 2 (Melbourne, 1988).
Recommendation H.261 was prepared by Study Group XV and was approved under the Resolution No. 2
rocedure on the 14 of December 1990.
ccm NOTE
In this Recommendation, the expression "Administration" is used for conciseness to indícate both a
¡lecommunication Administration and a recognized prívate operating agency.
© ITU 1990
ai rights reserved. No part of this publication may be reproduced or utilized in any fonn or by any rneans, electronic or
aechanical, including photocopying and microfilm, without permission in writing from the ITU.