CTX600 Converged Access QOS Appliance and VoIP Accelerator Professional Bandwidth Management Device for VoIP and general IP Communications. Eliminates Jitter and Clipping in VoIP Calls caused by WAN congestion in both directions. Plug-n-Play QOS Appliance supports preferential routing for VoIP and one additional data class plus best effort for all other network traffic. -Fast and easy to install GUI -Industry-leading traffic management -SIP application layer traffic classification -Precise bandwidth guarantees using Class-based Queuing -Flow optimization with TCP rate shaping -Packet size optimization -Bridges 4 LAN ports to Single WAN port -Bandwidth bursting and borrowing on a per-class basis enables dynamic and optimal use of all bandwidth with or without VoIP present -Designed for plug-n-play install. Instant QoS with CTX600™