Products Customer Service Support What's New How to Buy About Us Job Opportunities Clearance Items ©2008 Cortelco, Inc. Home > Products > Centurion Centurion Basic Model: 3690**V0E21F ** Color codes 00-Black 44-Ash Downloads Centurion 3690 Manual Features: Tone/Pulse Dialing Ringer Volume Control Flash Line-in-use Indicator Visual Ring Indicator Hearing Aid Compatible Desk/Wall Mountable Streamlined Directory Card Fully Modular Last Number Redial Pause Centurion Extended Basic Model: 3691**V0E27F ** Color codes 00-Black 44-Ash Downloads Centurion 3691 Manual Features: Tone/Pulse Dialing Ringer Volume Control Flash Line-in-use Indicator Visual Ring Indicator Hearing Aid Compatible Desk/Wall Mountable Streamlined Directory Card Fully Modular Last Number Redial Pause Data Port Message Waiting Light Hold Mute Centurion Memory Model: 3693**V0E27S ** Color codes 00-Black 44-Ash Downloads Centurion 3693 Manual Features: Tone/Pulse Dialing Ringer Volume Control Flash Line-in-use Indicator Visual Ring Indicator Hearing Aid Compatible Desk/Wall Mountable Streamlined Directory Card Fully Modular Last Number Redial Pause Data Port Message Waiting Light Hold Mute "Insta-Touch" Memory Monitor Handsfree