ATM-STM CONVERTER

摘要

PURPOSE:To reduce the memory capacity and to reduce the cost of the converter by deciding a quantity to be consumed in a reception buffer memory corresponding to a channel and its area in matching with a speed used for each channel for an STM data. CONSTITUTION:A cell composition recovery circuit 4 decides the quantity to be used of a reception buffer memory 3 corresponding to the speed used for each channel of an STM data generated by a multiplex P-S conversion circuit 7. The memory 3 is formed with reception areas by channels of an N-ISDN primary interface. This depends on a maximum value of a fluctuation width of an ATM network 12. Thus, the one memory 3 is enough when STM information is 23 channels. Even when a digital private line for multiplexing is in existence, only the multiplexer circuit corresponding to a terminal equipment is enough and in the case of discontinuous channel, the channel number corresponding to the reception area is continuously used.