| 摘要 |
A cable modem (10) has functions of packetizing a voice signal and transmitting/receiving the packetized voice signal to/from a connected communication device over an IP network. The cable modem (10) includes a communication unit (41,42) which transmits/receives a signal over the IP network, a detection unit (43) which detects information on the connected communication device from the signal received by the communication unit, and a display unit (51) which displays the information on the connected communication device included in the signal detected by the detection unit. <IMAGE> |
