| 摘要 |
<p>A data recording system for IP telephony avoids lost voice data due to loss of IP packets during transmission, includes a recording device connected to the IP network and capable of recording audio data transmitted between telephone terminals. On communication, speech IP packets corresponding to audio data are transmitted between telephone terminals by way of the network in approximately real time and recording. IP packets corresponding to the audio data for the communication are transmitted to the recording device by way of the network in a way that does not cause any IP packet loss during transmission and that is not performed in real time, thereby recording the audio data by the recording device.</p> |
