Notes from the voice network
Guides, explainers and industry insight on wholesale voice, SIP trunking and routing quality, written by the people who run the network.
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The four numbers that tell you if a route is any good
ASR, ACD, PDD and NER are the metrics that separate a premium voice route from a cheap one. Here is what each actually measures, and how they mislead.
Least-cost or quality routing? The honest answer is both
Buying voice on price alone quietly costs more than it saves. Here is how least-cost and quality routing actually differ, and how to blend them without overpaying.
3 articles
The four numbers that tell you if a route is any good
ASR, ACD, PDD and NER are the metrics that separate a premium voice route from a cheap one. Here is what each actually measures, and how they mislead.
Least-cost or quality routing? The honest answer is both
Buying voice on price alone quietly costs more than it saves. Here is how least-cost and quality routing actually differ, and how to blend them without overpaying.
SIP response codes you will actually see, and what they mean
A practical field guide to the SIP failure codes that show up in real call logs, what each one is really telling you, and which side of the interconnect to look at first.
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