Abstract: Method of controlling a delay fluctuation absorption buffer and apparatus for controlling a delay fluctuation absorption buffer are able to cope with a delay fluctuation magnitude that changes at any time depending upon traffic situations of a packet transmission channel when information that should be reproduced in real-time is transmitted in the form of packets. When receiving audio data is started, received packets are started to be read out from a delay fluctuation absorption buffer after received packets of the number equal to a start accumulation packet number had been accumulated in the delay fluctuation absorption buffer. If the number of received packets accumulated in the delay fluctuation absorption buffer exceeds a maximum accumulation packet number, then received packets of a predetermined number are discarded.

Abstract: A personal computer having a convenient handset for transmitting and receiving a call. A handset (20) is connected to a personal computer (10) connected to a communication line. The personal computer (10) outputs audio data, received through the communication line, to the handset (20). The personal computer (10) includes an audio driver (12) to output audio data from the handset (20) to the communication line and a communication port driver (11) to transmit and receive audio data between it and the handset (20). The handset (20) is connected through an RS-232C cable (30) to the personal computer (10). The handset (20) transmits audio data to the personal computer only when a hookswitch (HS) is placed in the off-hook state. The audio driver (12) detects the condition of the hookswitch HS based on the existence of audio data from the handset (20).