Wave Issue 0508 2/25/05 Article 13-01

***Telchemy Releases VoIP Tech Notes

With the increasing deployment of Voice over IP across
enterprise companies and service providers, most industry
experts agree that Fault and Performance Management is
critical to the success of their VoIP deployments. However,
there is some confusion or lack of consensus as to what call
quality is and how to best measure it. For example:

What’s the difference between listening, conversational
and transmission quality?

What tests can network managers use to measure call
quality?

What’s the “E Model?” How is it used?

When should one use MOS scores? R Factors?

To this end, Telchemy, Incorporated has published a “Tech
Note: Voice Quality Measurement” to answer these questions
and more. The second in Telchemy’s series of educational tech
notes, “Voice Quality Measurement” describes commonly used
call quality measurement methods, explains metrics in
practical terms and describes acceptable voice quality levels
for Voice over IP networks.

www.telchemy.com/appnotes/TelchemyVoiceQualityMeasurement.pdf