Abstract

NEC America, Inc. commissioned The Tolly Group to evaluate the end-to-end Quality of Service and voice quality capabilities delivered by its NEAX 2000 IPS (IP PBX), an Internet Protocol telephony server that supports peer-to-peer IP voice connectivity using the NEC Series E Dterm IP phones, together with the NEC BlueFire 720/730, a chassis-based, Layer 2/Layer 3 switch, and it BlueFire IX5010, a multi-service IP switch/router. Engineers tested the QoS effectiveness of the NEC end-to-end solution to support voice over IP (VoIP) with and without “severe traffic congestion.”