Number | Name | Date | Kind |
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4633246 | Jones et al. | Dec 1986 | |
4835763 | Lau | May 1989 | |
5191579 | Matsushita et al. | Mar 1993 | |
5317198 | Husbands | May 1994 |
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R. Ballart--Y.C. Ching IEEE Communications Magazine, vol. 27, No. 3, Mar. 1989 "SONET: Now It's the Standard Optical Network" pp. 8-15. |