CELL RECEPTION DEVICE HAVING SOURCE CLOCK REPRODUCTION CIRCUIT

摘要

PROBLEM TO BE SOLVED: To reduce the jitter quantity of a reproduced source clock even if cells are abolished during transmission by returning the use level of a first buffer to the same use level as a case when the cells are not abolished by means of stopping reading from the first buffer for the number of the abolished cells. SOLUTION: A cell dissolving means 1 processes the AAL(ATM adaption layer) header of the received cell, detects cell abolishment and dissolves payload. The first buffer 2 stores payload separated in the cell dissolving means 1, absorbs delay fluctuation and stores the number of the abolished cells detected in the cell dissolving means 1. When cell abolishment is detected in the cell dissolving means 1, information showing the number of the abolished cells is written in the first buffer 2. When the counting means 7 reads information showing cell abolishment from the first buffer 2, reading from the first buffer 2 is stopped for the number of the abolished cells.