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Proceedings Paper

Implementation of Flexible Access System
Author(s): Chen-Hsiang Wu; Jan-Wen Peng; Shou-Kuo Shao; Tzooming Eric Chen; Shih Chang Chen; Meng-Shu Lee; K.-Y. Yen; Tsung-Mao Chen; Ching Sheu Wang; Yuan-Kuang Tu
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Paper Abstract

In this paper we present the architecture, operation, and the implementation of a prototype system, flexible access system (FAS), developed by CHT T.L. for FITL applications. FAS adopts fiber to the curb (FTTC) topology and provides POTS, ISDN BRA, and T1 services. The system consists of three main parts, namely, fiber central office terminal (FCOT) at switch side, fiber nodes (FN) at customer side, and a monitor station. FCOT and FNs are connected through an STM-1 fiber distribution ring. The hardware structure and the operation principle for each module are described. FAS contains the mux-demux module, POTS, ISDN, and T1 central office/customer service modules, operation modules, and power module. In the design, each central office service module in FCOT simulates as a CPE to terminate signals from switch, and will separate the data and signaling and map them into DS1 format. Mux/demux module will add/drop these DS1, put the operation information in data communication channel (DCC), and convert them to STM-1 optical link. Each customer service module in FN simulates switch line cart to regenerate the signal for customers. The prototype system implementation confirms the benefits of introducing SDH add/drop technologies to FITL system to provide basic telecommunication services. The design experience reveals that the clock synchronization method and noise reduction technique can significantly influence the performance in such a system. The test results that demonstrate and verify the designed functionality and the service quality of the prototype system will be presented.

Paper Details

Date Published: 19 June 1998
PDF: 8 pages
Proc. SPIE 3420, Optical Fiber Communication, (19 June 1998); doi: 10.1117/12.312841
Show Author Affiliations
Chen-Hsiang Wu, Chunghwa Telecom Labs. (Taiwan)
Jan-Wen Peng, Chunghwa Telecom Labs. (Taiwan)
Shou-Kuo Shao, Chunghwa Telecom Labs. (Taiwan)
Tzooming Eric Chen, Chunghwa Telecom Labs. (Taiwan)
Shih Chang Chen, Chunghwa Telecom Labs. (Taiwan)
Meng-Shu Lee, Chunghwa Telecom Labs. (Taiwan)
K.-Y. Yen, Chunghwa Telecom Labs. (Taiwan)
Tsung-Mao Chen, Chunghwa Telecom Labs. (Taiwan)
Ching Sheu Wang, Chunghwa Telecom Labs. (Taiwan)
Yuan-Kuang Tu, Chunghwa Telecom Labs. (Taiwan)

Published in SPIE Proceedings Vol. 3420:
Optical Fiber Communication
Winston I. Way; Franklin F. Tong; Alan Eli Willner, Editor(s)

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