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Celideo Blog On VoIP Quality Metrics

celiddeo_rs_biggerDo you ever wonder what factors impact your experience using VoIP technology? Very recently Celideo, a maker of testing tools for voice and video over IP, posted a very nice summary of the issues surrounding VoIP quality. The post is entitled, “VoIP QoS Metrics Explained” and I find it a good tutorial on the subject. It’s comprehensive yet concise, and given in easy-to-understand terms.

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VoIP Spear: New VoIP QoS Monitoring Service

Earlier this week I found a newly launched VoIP QoS monitoring service called VoIP Spear. It works by sending a ping to the end-point in question at a certain interval, then analyzing the timing of the resulting responses. The service is free for monitoring a single end-point so I setup an account and pointed it at my office IP address.

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Traffic Shaping For VOIP With m0n0wall

My screencast guide to traffic shaping for VOIP using m0n0wall has been posted on the m0n0wall web site.

However, Manuel Kasper (m0n0wall project lead) had some interesting ideas on how to revise and perhaps simplify my approach. What he describes departs from the approach underlying the present implementation of the Magic Shaper in m0n0wall. Use of the Magic Shaper is the basis of the existing screencast.

Updated to provide a YouTube version in the post and ftp downloadable high quality version.

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Jared Valentine’s “Application Aware Triggered QoS”

Jared Valentine has posted an interesting description of a system he developed for automatically manipulating QoS & bandwidth allocation to support the use of VOIP over his DSL service. He calls this “Application Aware Triggered QoS.”

He described his initial problem as being trouble with inbound bandwidth management. This is something that I’ve never experienced myself. My trouble was always related to limited outbound bandwidth.

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