The ITT/Cortelco Centrurion 3690 basic business phone. Features of this phone include:
- Last Number Redial
- Tone/Pulse Switchable Dialing
- Ringer Volume Control
- Hearing-Aid Compatible
- Visual Ringing Indicator
- Desk/Wall Mountable
- Stream-lined Directory
- Line In-Use Indicator
- Flash
- Pause
