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Proceedings Paper

FITL program of Deutsche Telekom and future network upgrading scenarios
Author(s): Bernhard Hein
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Paper Abstract

In Germany the Deutsche Telekom is realizing worldwide the largest installation of FITL systems under the programme OPAL (Optical Access Line) to build up a modem infrastructure in the eastern part of the country. At the end of 1997 about 1,5 million access lines will be based on fibre systems, mainly realized with FTTC solutions. Whilst in the first period of the installation PON structures have been favoured later on active networks have been implemented which showed much better economics and higher flexibility. The experiences with these systems are used to modernize also the existing telephone network in die western part in combination with a full digitization of all local exchanges. With the FITL systems the switching equipment can be concentrated on fewer locations leading to lower operation and maintenance costs. Deutsche Telekom operates besides the telephone network also worldwide the largest CATV network with about 25 million households passed. Currently work is going on to look for network upgrading techniques which allow the introduction of new broadband services like video-on-demand and broadband online services. FTTH is for all major network operators a long term target, however, due to the high digging costs and the still too high system prices FTTH is not yet economic and mainly the replacement of the first few hundred meters from the customers to the network node is much too costly. Fibre to the cabinet and new techniques like VDSL on copper lines or 64QAM on coax cables in connection with digital video transmission can be the next step to bring the fibre nearer to the home. Scenarios for these upgrading techniques will be presented and compared.

Paper Details

Date Published: 2 January 1998
PDF: 12 pages
Proc. SPIE 3211, International Conference on Fiber Optics and Photonics: Selected Papers from Photonics India '96, (2 January 1998); doi: 10.1117/12.345582
Show Author Affiliations
Bernhard Hein, Deutsche Telekom AG Technologiezentrum (Germany)

Published in SPIE Proceedings Vol. 3211:
International Conference on Fiber Optics and Photonics: Selected Papers from Photonics India '96
J. P. Raina; P. R. Vaya, Editor(s)

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