Additional Details ------------------------------ Product description: Most popular design for KX-TDA Digital Hybrid IP-PBX Systems. Great value and price for 3-Line LCD display system phone. The Panasonic KX-T7633 is a digital proprietary telephone with 3-Line Back-lit LCD, speakerphone, and whisper off-hook voice announce OHCA. Description: - LCD 3-Line Backlit LCD - Alphanumeric Display - Adjustable LCD Contrast level - Caller ID 1 - Call Log - Callback - Multi-Language LCD Support - Navigator Key - Multi-Angle Tilt Body, four angles to allow for the most comfortable positioning - Message/Ringing Lamp - Melody Ringer - 10 melodies to choose from for each CO Ring Tones - choice of 20 tone types for each CO Hands-Free Speakerphone - Full Duplex Headset Jack Yes Flexible Outside (CO) Line Buttons - 24 keys Dual Color LED, green and red illumination, depending upon line status - Conference up to 8-party - Auto Dial/Store - Automatic Redial - Wall Mountable Capability - Built-in Speaker - Paging through the built-in speaker OHCA (Off-hook Call Announcement) - Off-hook Monitor - Background Music (BGM) users can hear the BGM through the system speaker when on-hook - FWD/DND (Call Forwarding/Do Not Disturb) - Whisper OHCA - Intercom - eXtra Device Port (XDP) - Independent and Parallel Modes Built-in USB Port with the use of the KX-T7601 USB Module Card Speed Dial - up to 1000 programmable system speed dial numbers PC Integration - optional USB port makes PC integration simple and seamless - 12 Key Add-On Module Compatible - 24 Key Add-On Module Compatibility - Cancel Key - Transfer Key - Hold Key - Message Key - Flash/Recall Key - Auto Answer/Mute Key - Pause Key Compatible With These Phone Systems: * KX-TDA50, KX-TDA50G, KX-TDA100, KX-TDA200, KX-TDA600 * KX-TDE100, KX-TDE200, KX-TDE600 * KX-NCP500, KX-NCP1000