Communication Server - Technical Manual
Timeline of Events

When playing back a recording through the media player, the Call Recorder places automatic and custom markers on the playback progress bar to allow the user to identify specific events during the call and jump straight to them. Events such as hold, retrieve, transfer, pause/resume recording or entering of an account code are automatically recorded (the events recorded may be dependent on the PBX and connection type). Additionally, custom markers can be added to a recording by the user at any time during the playback of a call.