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HDVoice: A Visual Analogy

HDV IP550 Here’s something of a challenge; find a visual way to represent the information density of HDVoice vs a narrowband PSTN call…and try to make it something the everyone can relate to. This is part of my recent attempt at such a display.

The human voice can create sound energy in the range of 80 Hz to 14 KHz. In contrast, the PSTN conveys a much more limited pass-band, typically 300 Hz – 3.4 KHz. That means that the PSTN fails to convey more than 70% of the potential energy in a voice.

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The Gigaset C610A: Dialing By SIP URI

We’ve had the Gigaset C610A in the house for quite some time. It’s long been on my list of devices for review. However, it’s difficult to find the time to commit to such tasks when the current model of Gigaset is so much like one of the prior models. There’s just no getting around the fact that the C61H handset is very like the C59H, which we’ve had for over two years.

That said, the C610A does offer a few niceties that were suggested to the company when they launched the line in the US back in 2009. Earlier today a new thread in the DSL Reports VoIP Forum prompted me to take just a little time to explore dialing by SIP URI on the C61H handset.

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Q: How Will Cat-iq Help HDVoice??

CAT-iq Logo-250 Earlier this week someone posed me a question by way of twitter. They asked, “How Will Cat-iq Help HDVoice??” I responded briefly, also via Twitter, but upon reflection I think a longer answer may be in order.

Some time ago VoIP luminary Jeff Pulver started to beat the drum for HDVoice. As an initial part of that effort he organized a couple of HDVoice Summits where interested parties could meet and discuss the issues surrounding widespread adoption of HDVoice.

The first of these events was in May 2009 in New York City. I was fortunate to be able to attend. It was there that I started to track who was promoting the use of HDVoice, how, and sometimes why*.

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