On Sat, 2006-06-17 at 10:16 +0200, Florian Overkamp wrote: > There are ways to guesstimate MOS scores on a call by continuously > getting some decent statistics from the jitterbuffer. We've had an > intern do some work on this using IAXclient. > > http://www.speakup.nl/en/opensource/jitterbuffer/
yes and I suggested that however, MOS is an opinion, so its totally subjective and not based on anything 'real'. That was kinda my point earlier. Personally I think that its better to isolate the network/cpu issues and correct them to get what a given implementation of a codec is supposed to be rated at (ideally the two would be intertwined). By looking at the jitterbuffer (assuming you have one, if not you may have to get some code that will inspect packets on the network which can be done but isnt as easy, its still not that difficult), latency, dropped packets, etc and generating stats based off that you can probably make a better guestimation of call quality without actually listening and then scoring the calls. The work that you have done so far is a great step towards a product that many people might find useful. In a nutshell the concept I am thinking about is a tool that you drop onto your network and it will monitor the data (presumably not just iax but sip, h.323, whatever) and generate live stats of the call and possibly even have an alarm system that would send off a page or something if conditions get too far from 'normal'. The approach to wait for customer complaints before reacting to voice degradation is likely not going to work for many. A tool like I described, which it seems you are well on your way towards even if that wasnt your intention, could add a more proactive approach to it and increase reliability and quality for many. I do not mean to trivialize network management and do understand that sometimes problems are outside your control (ie packets on the uncontrolled internet may experience problems because of a tertiary provider between you and the remote end) and as such this is just one peice of the puzzle as I see it. -- Trixter http://www.0xdecafbad.com Bret McDanel Belfast IE +44 28 9099 6461 DE +49 801 777 555 3402 Utrecht NL +31 306 553058 US WA +1 360 207 0479 US NY +1 516 687 5200 FreeWorldDialup: 635378 http://www.trxtel.com the VoIP provider that pays you!
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