PURPOSE: To send plural audio data to designated time slots of a time-division multiplexer channel.
CONSTITUTION: When the output of a time slot counter (CNT) 2 is given to a register (REG) 7 through a register address selector (RAG) 4, data corresponding to the address is outputted. A head address A1 of first sent data from the REG 7 and sent byte number O are added by an adder ADD 11, and the result is given to a memory (MEM) 5 through a memory address selector (MAS) 6. Data read out from the MEM 5 is converted to serial data by parallel/serial converter (P/S) 8 and is outputted to the time-division multiplexer channel. When a sending flag in data read out from the REG 7 is '1', one is added to the sent byte number by an ADD 9, and a CMP 10 compares a number a1 of sent data bytes and sent byte number 0 with each other, and the sending flag is set to '0' and is written in the REG 7 through a register data selector (RDS) 3 in the case of coincidence, but the sending flag is written as it is in the case of noncoincidence.
SHIMIZU TOMOYOSHI
YOSHII HIROAKI
