Voice cards and channels

General voice card configuration tasks in a TDM recording environment are described. In TDM recording, you can use one of three audio detection methods.

Audio detection methods

Signaling—Select this option for D-Channel-based recording.
Energy—The Recorder will start or stop recording based on detection of any sound, including but not limited to a human voice.
Human Voice—The Recorder will start or stop recording based on detection of a human voice (also referred to as VOX recording).

Viewing available voice cards

The Recorder Manager lists available digital and analog voice cards, along with their properties and available channels. Only T1/E1 cards can record trunk-side (that is, between the switch and PBX), so trunk settings appear for T1/E1 cards only. All other cards record station-side (that is, between the PBX and extensions).