An SDH STM-1 termination IC

The STM-1 termination IC receives and transmits Synchronous Digital Hierarchy (SDH) STM-1 signals. In addition to STM-1 frame generation and frame alignment, the chip parallelly scrambles and descrambles the STM-1 signal, provides pointer generation and interpretation, and performs payload insertion and recovery. Section and path overheads are extracted and inserted, alarm signals are detected and reported, and performance monitoring at various layers is also performed. Designed as a basic building block of SDH equipment, the chip fully complies with the SDH transport network standards. After an FPGA prototype has been verified in board environment, it is converted to CMOS gate array.