Patent ID: 7206328

Claim:
A SONET transmission control device performing a multiplexing transmission control comprising: a pointer replacement circuit including a count control part generating a count value by performing a count control of STS/VT for SONET and performing a channel management control on the basis of specific information which indicates whether an STS or VT signal is to be selected for cross connection, a head position detecting part detecting a head position of path information based on a pointer value, a clock exchange memory part commonly using a storing area in the STS/VT, receiving a write/read control with respect to valid path information indicated by the head position and exchanging an input clock of the STS/VT for an output clock, a write counter generating a write count value corresponding to the input clock for the clock exchange part, a read counter generating a read count value corresponding to the output clock for the clock exchange memory part, and a pointer adding part adding a pointer of STS/VT to the valid path information read; and a cross-connect circuit including a memory control part having a two-plane memory storing a signal with the pointer being added, a memory switch part generating memory switch information used for switching the planes of the memory on the basis of a count value, and an address generating part generating a write address and a read address of the memory on the basis of the count value.