- Provides a six-line x 16 character, Liquid Crystal Display (LCD) and embedded softkeys for efficient call handling and easy message management
- Offers feature buttons for quick access to frequently used functions such as hold, mute, Do-Not-Disturb, transfer, forward, conference page and more
- Provides a message waiting lamp, adjustable base and wall mount
- Includes full duplex speakerphone and dedicated headset support
- Provides red Light Emitting Diodes (LEDs) to indicate a call is active, ringing or holding
- Provides QoS and Web-based programming
- Upgradeable through software
- Supports G.711 a-law, G.711 u-law, G.729a, and G.729a/b vocoders
- Supports centralized power over LAN (Local Area Network) (IEEE compatible)
- Enables Dynamic Host Configuration Protocol (DHCP) or static IP addressing
- User configurable Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) port number
- Includes extra switch port
- Configurable in Inter-Tel Protocol or SIP mode. Features may vary in each mode
- Supports VLAN tagging, which eases management, improves call quality and increases security
- The Inter-Tel® Model 8662 includes an extra switch port