OpenVoice can record up to 4 hours of a conference call, even if the recording isn't continuous.

The organizer can stop and start a recording multiple times during a conference call during the 4 hour period and still generate 1 recording file. However, after that period, the recording can be immediately restarted for calls lasting longer than 4 hours. In a case like this, the organizer will get two .MP3 files.