We're pleased to announce that Teracom Training Institute has been selected by Tektronix's Minacom service level assurance and VoIP testing division as a Certified Training Partner. This designation recognizes Teracom's quality training and relevance in providing training on fundamentals and infrastructure to complement Tektronix's service level assurance products. To mark the occasion, we are giving away a free Tektronix VoIP Measurements and Thresholds Reference Chart, designed to help operations personnel, support engineers, network technicians, and sales and marketing staff to fully understand the diverse measurements used to benchmark, monitor, assure and troubleshoot VoIP services. Presented in a concise, easy-to-read format, this chart is a valuable reference for understanding and managing the complexities of VoIP service quality. There is much more to measuring VoIP quality than Mean Opinion Score (MOS)! Callers expect quick connection after dialing, distortion and echo-free calls, adequate call volume, and functional fax service. This chart summarizes 48 metrics commonly used for speech and call quality, connectivity performance, Internet/data transmission, fax and carrier trunk testing, along with standard industry abbreviations, measurement ranges, units used, and common severity levels (Critical, Major, Minor, Warning, Excellent) used by operators for fault management and service monitoring. What do all these measurements mean? How are they calculated? The other side of the chart explains service quality metrics in detail, along with applicable standards, and how they are measured. A special section provides an overview of MOS, comparing common MOS algorithms and outlining their use in standard testing applications.