Fiber – Optical Lines Reliability: The Economic Aspect

High-speed telecommunications fiber-optical cable lines reliability refers to the dominant factors of ensuring their economic efficiency. Telecommunications operator's income loss due to the data transmission services failures caused by communications breakdowns or the service life shortening depends directly on the cable lines capacity which increases year by year. The paper presents telecommunication fiber-optical cable lines reliability and durability quantifications. Fiber-optical cable trouble-free operation probability in external and internal damages influence is estimated. The optical fiber destruction cumulative danger in free position (and) under bending and torsion is being calculated. The fiber-optical cable lines service life is determined by the energy reserve exhaustion due to losses increase caused by additional attenuation of cable inserts in linear transmission path during damage restoration works. The analytical expressions of faults duration, the fiber-optical cable line service life average and gamma percent values, the income loss due to data transmission services failures are given. Income losses in monetary units are given for a line with an operating frequency band in the optical ranges S.L, the number of spatial channels I...I2, the idle coefficients IO 10, the service life shortening 1...3 years.