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IMPORT
R:\\ART\\W INTERNATIONAL TELECOMMUNICATION UNION
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CCITT F.111
THE INTERNATIONAL
TELEGRAPH AND TELEPHONE
CONSULTATIVE COMMITTEE
TELEGRAPH AND MOBILE SERVICE
OPERATIONS AND QUALITY OF SERVICE
PRINCIPLES OF SERVICE FOR
MOBILE SYSTEMS
Recommendation F.111
IMPORT Geneva, 1991
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Printed in Switzerland
FOREWORD
The CCITT (the International Telegraph and Telephone Consultative
Committee) is a permanent organ of the International Telecommunication Union
(ITU). CCITT is responsible for studying technical, operating and tariff
questions and issuing Recommendations on them with a view to standardizing
telecommunications on a worldwide basis.
The Plenary Assembly of CCITT which meets every four years, establishes
the topics for study and approves Recommendations prepared by its Study Groups.
The approval of Recommendations by the members of CCITT between Plenary
Assemblies is covered by the procedure laid down in CCITT Resolution No. 2
(Melbourne, 1988).
Recommendation F.111 was prepared by Study Group I and was approved under
the Resolution No. 2 procedure on the 11 of March 1991.
___________________
CCITT NOTE
In this Recommendation, the expression "Administration" is used for
conciseness to indicate both a telecommunication Administration and a recognized
private operating agency.
F ITU 1991
All rights reserved. No part of this publication may be reproduced or utilized in
any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the ITU.
PAGE BLANCHE
Recommendation F.111
Recommendation F.111
PRINCIPLES OF SERVICE FOR MOBILE SYSTEMS
1 Scope
1.1 This Recommendation defines the principles applicable to international
public correspondence service provided by mobile systems connected to the
international telecommunication (fixed) networks. This Recommendation applies to
aeronautical, land and maritime mobile-satellite and terrestrial systems.
2 Introduction
2.1 There is an increased availability of mobile telecommunication systems on
an international, regional and national basis. International mobile satellite
systems offer telephone, data and telex services to aeronautical, land and
maritime mobile users. Regional and national cellular systems, both analogue and
digital, are in operation or at an advanced planning stage. Users of these mobile
systems expect to be connected to the international telecommunications networks
and be able to obtain international services available to fixed network
customers. In order to ensure that both fixed and mobile user needs are met,
principles of service for both satellite and terrestrial mobile systems when
interworking with the international telecommunication networks are presented in
this Recommendation.
3 Services
3.1 The services offered by mobile systems (e.g. voice, data, telex) when
interworking with the international telecommunication networks should, as far as
practicable, be similar to those offered on fixed networks.
4 Operation
4.1 When interworking between the mobile system and the fixed network the
operational procedures for mobile system users should, wherever possible, be the
same as for fixed networks. The same tones, announcements, service codes and
signals, etc., used in the fixed network should be recognized and where
appropriate returned by the mobile system.
4.2 Any numbering plan for a national mobile system normally is part of the
relevant national numbering plan of the country in which it is resident.
4.3 For international mobile systems the numbering plan should either be
derived from the national numbering plan of the participating countries or follow
the international numbering plan applicable for the services to be provided.
4.4 There should be mechanisms in place to cater for the needs of any call
recording, billing and international accounting functions that might be required.
5 Service between mobile systems
5.1 There should be no restrictions to establishing international calls
between mobile terminals in different mobile systems via the relevant fixed
network(s). For example, a user of a land mobile cellular terminal should be able
to make an international telephone call to a mobile satellite terminal using the
established international routing methods and procedures.
styleref head_footRecommendation F.111PAG
E1
6 Quality of service
6.1 The quality of service (e.g. bit error rate for data) of a mobile system
should be such that the service experienced by the mobile user should be, where
practical, similar to that of a user of a fixed network service.
7 Service limitations
7.1 It is recognized that because of various reasons that mobile systems may
not provide all the same services to their users as provided to users of the
fixed telecommunication networks. Any limitation on service imposed by the mobile
system on its users should, as far as practicable, not adversely affect the
quality of service provided to fixed network users when the systems are
interconnected.
8 Special mobile services
8.1 It is recognized that mobile systems often provide services other than the
conveyance of public correspondence. Mobile services may involve special
services, e.g. priority and/or preemption treatment for safety of life messages,
navigation, etc.
8.2 Facilities for such special services are not necessarily available within
the fixed networks. Where necessary Administrations should make any arrangements
for the provision of these services (e.g. dedicated circuits), which is then a
national matter outside the scope of CCITT Recommendations.
8.3 CCITT Recommendations cover the effects of such special services on calls
to/from the fixed networks.
PAGE2 styleref head_footRecommendation F.111