Benes configurations of circuit in node with space cross connections for transparent optical networks

There is a consideration of the transparent optical network with space cross connections in nodes realized with Benes configuration of circuit. The equations for the Benes configuration are recalculated and improved for relations among number of entrances and exits in circuit N and number of direct symmetric two channel couplers C, number of voltage electrode circuits V, characteristic of attenuation A and characteristic of signal to noise ratio SNR. The numerical analyze has been performed for Benes configuration of direct two channel symmetric couplers on circuit for space division multiplexing and cross connecting relating to specified essential characteristics.