Voice quality assessment in Asterisk

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Hi,

How do you typically test voice quality in Asterisk? For example if you like to do load testing, or monitor voice quality and get notified if certain calls had bad quality for proactive maintenance?

Thank you!

Best Regards,
Sevana Oy
http://www.sevana.fi

5 thoughts on - Voice quality assessment in Asterisk

  • Take a look at the website mentioned in GPs post. He/they already know
    this, I guess it is a fishing expedition for competitors 🙂

    We don’t do the test calls method, but use inline probes (Fluke ACEs)
    that analyze all traffic and give a MOS score to SIP calls and save
    network statistics per call (can be retrieved from the RTCP reports in
    asterisk). These probes and the analyzer software aren’t bug free and
    perfect but give a good indication of all historic calls. Once a problem
    is spotted we move to test calls to trace the problem.

  • Those boxes run around $50k USD, I’ve only seen them once back in the late 1990s.

    At work for customer consulting we have very expensive site licenses for Prognosis IPT Assessor which generate great looking pdf reports.

    We also use Cisco IOS IP SLA however it doesn’t have a reporting mechanism.

    href=”mailto:asterisk-users-bounces@lists.digium.com”>asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Bert Van Kets
    Sent: Friday, October 08, 2010 8:24 AM

    The professional way is to do a series of test calls, play a reference file and record the audio at the incoming side. You then use both files to calculate a MOS score. This method is used by telco’s to do quality checks.
    https://secure.wikimedia.org/wikipedia/en/wiki/Mean_opinion_score
    http://voip.about.com/od/voipbasics/a/MOS.htm

    Bert

    Hi,

    How do you typically test voice quality in Asterisk? For example if you like to do load testing, or monitor voice quality and get notified if certain calls had bad quality for proactive maintenance?

    Thank you!

    Best Regards,
    Sevana Oy
    http://www.sevana.fi

  • One quick clarification please… With Fluke ACEs you measure MOS according
    G.107, E-model, right?

    Thanks a lot to all who replied and will reply!

  • Don’t know if it is g.107 but it has to be something similar if it
    isn’t. I’m personally more interessted in the network statitics.