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Proceedings Paper

Subscriber loop optical distribution architecture: a cost-effective TDM/TDMA subscriber loop system
Author(s): Javier R. Garcia; Charles A. Eldering
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Paper Abstract

While it is clear that the development of the laser and low loss optical fiber has had an unmistakable impact on the field of telecommunications, the deployment of optical fiber in the subscriber (local) loop is an especially challenging task. It requires development of low cost equipment that will initially be used at low bit rates (< few tens of Mb/s) due to the fact that basic telephone service does not require more than 64 kb/s per subscriber. Transmission of TV data, in either analog or digital form, will make more efficient use of the fiber bandwidth and generate additional revenues. But as seen from the perspective of the telephony industry, basic telephone services are the principal source of revenue and economic justification for the installation of subscriber loop fiber systems. For large scale deployment in the subscriber loop, the fiber optic system must provide basic telephone services with equal or better performance at a cost that is competitive with that of existing copper pair technology. In this paper we examine a number of possible fiber-to-the-home (FTTH) and fiber-to-the-curb (FTTC) architectures, and present an architecture for urban areas that is best classified as fiber-to-the-building (FTTB). We examine the costs and performance characteristics of the various networks. We show how demographic information can be used to optimize the capacity of the remote terminals. It is shown that for the demography of Spain (where in urban areas the majority of the population resides in apartment buildings with 10 or more dwellings) a remote terminal with a variable subscriber capacity presents a cost savings over remote terminals with a fixed number of subscriber channels.

Paper Details

Date Published: 1 February 1992
PDF: 11 pages
Proc. SPIE 1578, Fiber Networks for Telephony and CATV, (1 February 1992); doi: 10.1117/12.134949
Show Author Affiliations
Javier R. Garcia, Telettra Espana (Spain)
Charles A. Eldering, Telettra Espana (Spain)


Published in SPIE Proceedings Vol. 1578:
Fiber Networks for Telephony and CATV
Lynn D. Hutcheson; Howard L. Lemberg, Editor(s)

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