Adtran IP 550

The Adtran IP 550 desktop phone is a four-line SIP phone that delivers calls of unprecedented richness and clarity and supports a comprehensive range of cutting-edge features. HD Voice technology enables life-like richness, clarity, and interactivity of voice communications. While designed to work with Adtran's Unified Communications suite of products, the Adtran IP 550 is certified to support a comprehensive set of features with a variety of leading SIP-based IP PBX and Softswitch platforms.