Active Star Configured Fiber Optic CSMA/CD LANs

Alan K. Truman; Robert W. Smith; Ronald V. Schmidt

doi:10.1117/12.967555

1 January 1987 Active Star Configured Fiber Optic CSMA/CD LANs

Alan K. Truman, Robert W. Smith, Ronald V. Schmidt

Proceedings Volume 0841, Fiber Optic Networks and Coherent Technology in Fiber Optic Systems II; (1987) https://doi.org/10.1117/12.967555
Event: Cambridge Symposium on Fiber Optics and Integrated Optoelectronics, 1987, Cambridge, MA, United States

Abstract

The widespread use of the IEEE 802.3 CSMA/CD (Ethernet) Local Area Network (LAN) has created demand for a fiber optic physical layer implementation to address security issues, hostile electromagnetic environments, modern structured wiring requirements and distance limitations of coaxial based implementations. Active Star CSMA/CD LANs will be described in this paper which consist of a central wiring Concentrator which supports point to point fiber links to Media Access Units (Transceivers) located at the Host computers. The fiber optic Active Star configured CSMA/CD LAN implementation provides a robust network which meets all the requirements imposed on an Ethernet Physical Layer. Collision detection is reliably performed in the electrical domain of the Concentrator. Network requirements included guaranteed collision detection, network reliability and easy addition and rearrangement of host connections. In addition, the Active Star implementation can provide an increased network diameter to 4.2 km and can support the four basic multimode fiber types, simultaneously, with substantial system margins.

Citation Download Citation

Alan K. Truman, Robert W. Smith, and Ronald V. Schmidt "Active Star Configured Fiber Optic CSMA/CD LANs", Proc. SPIE 0841, Fiber Optic Networks and Coherent Technology in Fiber Optic Systems II, (1 January 1987); https://doi.org/10.1117/12.967555

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KEYWORDS

Solar concentrators

Fiber optics

Transceivers

Local area networks

Standards development

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Interfaces

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