| 摘要 |
<p>A cable modem (10) with a function of packetizing voice information and transmitting/receiving the packetized voice information includes an interface for connection to an ISDN (Integrated Services Digital Network) telephone, a connection control unit (52) which executes a connection control for the ISDN telephone connected via the interface, and a VoIP control unit (50) which executes a VoIP-related protocol process for a voice call by the ISDN telephone that is connection-controlled by the connection control unit. <IMAGE></p> |
