Sevana Oy Blog » vqt

1 $ = 1 €

admin — Tue, 02 Aug 2011 05:20:53 +0000

Starting from 1.August Sevana announcesa “special exchange rate” of 1 $ = 1 €urofor US customers.

The prices of all products (AQuA, NIQA, Asterisk VQM) and several services are to be understood in US dollars instead of Euros,
but only for a limited time.

Don’t miss your chance for considerable savings!

Asterisk VQM supported codecs

admin — Tue, 22 Feb 2011 15:43:55 +0000

Hi,

Here is the list of codecs supported by Asterisk VQM:

G.711 ulaw (as used in US)
G.711 alaw (as used in Europe)
G.722 – 16 kHz wideband codec
G.723.1
G.726 – 32kbps only (16/24/32/40kbps supported in format_g726 for files
G.729 – may require a license
GSM
iLBC
LPC10
Speex

Basically, all codecs supported by Asterisk PBX are supported by Asterisk VQM. When narrowband codec used for transmission quality assessment is performed by AQuA Voice, and in case of wideband codec MOS score is obtained by AQuA Wideband.

G.711 ulaw (as used in US)
G.711 alaw (as used in Europe)
G.722 – 16 kHz wideband codec; passthrough, playback and recording in Asterisk 1.4; full support incl. transcoding in Asterisk 1.6, a backport for 1.4 is available, or use this more up-to-date patch
G.723.1 – pass-thru for people who need a license , free for other people
G.726 – 32kbps only (16/24/32/40kbps supported in format_g726 for files); flawed until Asterisk 1.4 which corrected the implementation and introduced codec g726aal2 and setting g726nonstandard for backwards compatibility with Asterisk 1.2 installations
G.729 – may require a license unless using pass-thru, free version available for use in countries without patents or for educational use only
GSM
iLBC
LPC10 (not recommended!)
Speex

Quick Guide to Asterisk VQM

admin — Tue, 15 Feb 2011 08:54:03 +0000

Hi,

It’s time to share more information on Asteriks VQM! Now you can request a VirtualBox VM with fully functioning Asterisk VQM to evaluate it locally. Read more about current functionality in Quick Guide to Asterisk VQM:

Login to the system
Main screen
Echo servers
Selecting reference audio
Echo server test setup
Conference bridge test setup
Load test setup
Alerts
Test Results

What can Asterisk VQM test? VoIP? PSTN? Everything!

admin — Thu, 27 Jan 2011 20:14:51 +0000

Hello again!

Very often when people hear about Asterisk VQM the first idea is that VoIP calls is the only what it can monitor. This is absolutely wrong! Asterisk VQM soluton consists of two parts:

- Asterisk – an open source software PBX that can work with different carriers depending on the hardware attached to the server

- AQuA – Audio Quality Analyzer that is doing perceptual (based on human perception model) audio quality asessment

So, please don’t get confused! If you need to:

- monitor call quality in VoIP

- monitor call quality in PSTN

- monitor call quality in a converged network

- find out whether voice quality degradation is related to your VoIP network or the problem comes from PSTN

- whatever else from voice quality testing and call quality monitoring…

Asterisk VQM can do it! Just let us know what you need and we’ll tell you how you can do that with Asterisk VQM!

What is Asterisk VQM? What does VQM stand for?

admin — Thu, 27 Jan 2011 11:00:49 +0000

We keep receiving once in a while questions from our prospects what does VQM stand for? It’s quite simple, VQM means Voice Quality Monitoring. Asterisk VQM means that Voice Quality Monitoring solution is built on open source free Asterisk PBX from Digium.

You are always welcome to contact us and we’ll be happy to answer all your question! Get in touch with us and read more about Asterisk VQM from our web site: http://www.sevana.fi