Reliability Optimization In The Design Of Telephone Networks

Telephone network reliability is defined as the degree of complying with subscribers expectations: the probability to have a given number of ready-to-use telephone channels between terminals. A model is presented for the cost minimization of an isolated telephone link, over capacity and channel reliability subject to reliability constraints. The optimization, achieved by Lagrange multipliers, results in a simple algorithm. The optimization of a link, belonging to a complex network, is reducible to the isolated link optimization problem.