The increasing deployment of broadband optical fiber transmission systems and the trend to a fiber-hubbed network architecture have increased concern about the survivability of intra-LATA (local access transport area) telephone fiber networks. Selection of an appropriate survivable network architecture depends upon tradeoffs between cost and survivability. The authors investigate a class of survivable network architectures by studying their quantitative tradeoffs between cost and survivability. A case study based on a metropolitan LATA network has shown that single homing architectures with 1:N diverse protection may provide affordable survivability for fibre cable cuts.
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