CABLE MODEM HAVING VOICE SPEECH COMMUNICATION FUNCTION AND PACKET CONTROL METHOD THEREIN

摘要

PROBLEM TO BE SOLVED: To stably connect a voice terminal regardless of whether the quantity of data to be transmitted from a data terminal is large or small, and to realize voice speech communication whose quality is high. SOLUTION: When communication with a CATV network is made available, a service flow setting processor 31 sets two high priority and low priority Best Effort Service Flows between a CM and a CMTS. A processing part 31 sets a UGS Service Flow between the CM and the CMTS. A service flow data processor 33 transmits a voice packet through the UGS Service Flow in a fixed time interval regardless of the presence or absence of the voice call control packet and a data packet, and transmits the voice call control packet and the data packet through the corresponding Best Effort Service Flow by giving priority to the voice call control packet when those data packets are transmittable.