Question 31/XV - Guide for the application of new technologies in local
networks

Considering

(1) that the study of this topic could be of benefit to developing
countries;

(2) that Study Group XV has already issued two publications on optical
fibres;

(3) that an important topic with relevant impact on future networks is
the application of new technologies in local networks,

What studies in cooperation with other Study Groups and GAS are
necessary in order to provide guidance to developing countries for the
application of new technologies in local networks?

Possible items to be considered

1. Introduction strategies.

2.Network architectures, including switching and multiplexing aspects.

3.Accesses and services.

4.Equipment and components.

5.System aspects.

6.Economic and financial aspects.

7.Terminology.

Note - This subject is still in an evolutionary stage. The preparation
of a publication in the next study period will depend on having gained
sufficient practical experience with new technologies in local networks.

ANNEX

(to Question 31/XV)

Optimization of the subscriber network through the
introduction of new services and techniques

Abstract

Due to the vast development of sophisticated and reliable communication
systems, most of which are adaptable to the subscriber network, and with
regard to the fact that the design of such new techniques will improve
the quality of transmission and could solve major problems such as space
limitation this is considered to be an appropriate subject for study.

Introduction

With regard to the fact that subscriber network will utilize the new
techniques and services in the near future, we recommend that a study
concerning the following facilities and services be undertaken:

a) ISDN services;

b) digital subscriber multiplexing systems2;

c) concentrators1;

d) application of ADPCM to double the capacity of 2 048 Mb/s links.

In order to implement the above facilities and services more
efficiently, the following criteria should be taken into account:

1) the needs of developing countries for the planning of
telecommunication networks;

2) with the development of ISDN, many aspects of the traditionally
separate voice and non-voice services are likely to be drawn closer
together;

3) the need to optimize subscriber network planning.

Proposal

Due to the widespread application of new techniques in the subscriber
network, we propose a study on the following subjects:

The study should take into account, from a practical standpoint,
planning, maintenance, management (technical and commercial operation),
cost and tariff aspects, etc.

1) Recommendation concerning the introduction of subscriber
concentrators or digital subscriber multiplexing system (DSMS) for
improvement or upgrading the existing subscriber network.

2) Bit rate plan for application of different speed of DSMS on tree
networks.

3) Recommendation concerning the application of ADPCM.

4) Recommendation concerning the network planning of the basic ISDN
services in a multiplexing mode in existing and expansion cable
networks.