Features:

* Provides access to features such as hold, transfer, conference and forward
* Offers hold button, ring and volume control buttons and on-hook dialing
* Allows users to enable Do-Not-Disturb (DND), sending calls to voice mail when the user is unavailable
* Provides red LEDs (Light Emitting Diodes) to indicate a call is active, ringing or holding
* Includes headset support, message waiting lamp, adjustable base and wall mount
* Provides QoS and Web-based programming
* Upgradeable through software
* Supports centralized power over LAN (Local Area Network) (IEEE compatible)
* Supports G.711 a-law, G.711 u-law, G.729a, and G.729a/b vocoders
* Supports Dynamic Host Configuration Protocol (DHCP) or static IP addressing
* User configurable Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) port number
* 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

Inter-Tel Axxess 550.8600 Black VoIP Business Phone Model 8600.Tested and No OEM packaging. Includes RJ-45 Cable and Handset.