Implementation of Flexible Access System

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

doi:10.1117/12.312841

19 June 1998 Implementation of Flexible Access System

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

Author Affiliations +

Proceedings Volume 3420, Optical Fiber Communication; (1998) https://doi.org/10.1117/12.312841
Event: Asia Pacific Symposium on Optoelectronics '98, 1998, Taipei, Taiwan

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.

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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, and Yuan-Kuang Tu "Implementation of Flexible Access System", Proc. SPIE 3420, Optical Fiber Communication, (19 June 1998); https://doi.org/10.1117/12.312841

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KEYWORDS

Networks

Switches

Telecommunications

Fiber to the x

Prototyping

Clocks

Interfaces

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