Abstract: In the condition that fixed and non-hierarchical routing which will practiced soon in our country's toll telecom network , we bring up a new optimization algorithm with mathematical model for sudden failures of telecom network solving the problem of service restoration .The optimization model aims at the maximum living rate . Through practice simulation we show that the algorithm of routing modification is better than the algorithm of routing a new design for its practicality.

Key words: telecommunication management networks, non-hierarchical network, optimizationalgorithms