The ITT/Cortelco Centurion 3691 extended basic business phone. Features of this phone include.
- Last Number Redial
- Tone/Pulse Switchable Dialing
- RingerVolume Control
- Hearing-Aid Compatible
- Visual Ringing Indicator
- Desk/Wall Mountable
- Stream-lined Directory
- Line In-Use Indicator
- Flash
- Pause
- Data Port
- Message Waiting Light
- Hold
