12.times.12 STS-1 switch

Abstract

A 12.times.12 STS-1 switch for outputting twelve STS-1 signals by switching of a VT unit or tie STS-1 unit after receiving inputted twelve STS-1 signals includes a 4-coding counter generating a data control signal and a carry out signal after counting inputed signals in accordance with an operation frequency, a 90-coding counter generating a VT group and a VT channel after counting a frame pulse in accordance with the carry out signal generated at the 4-coding counter, an address generation part generating a switch information read address and a data selection address in accordance with the VT group and the VT channel generated at the 90-coding counter, a data selection signaling generation part outputting a data selection address generated at the address generation part in accordance with the selection signals outputed from the 4-coding counter after combining or selecting, and a data output part selecting and outputting an output data of a data memory in accordance with the data selection address outputted from the data selection signal generation part.

Dependencies are inferred from the claim text.