FIELD: telecommunication. SUBSTANCE: traffic which is directed to channels of substituted block is buffered; buffers with transmitted data of substituted block are released after transmission of their data to their destination. Then substituting block is connected to channels of substituted block and information in unit is updated in order to match new configuration. Then input traffic from line is received. Finally outcoming traffic is activated by releasing buffered traffic through substituting block. EFFECT: simplified design, increased efficiency of unit switching operation. 6 cl, 1 dwg
