VoIP call quality falls - Survey

Discussion in 'VOIP' started by KnowingAbout.com, Jul 27, 2006.

  1. VoIP call quality has taken a nosedive over the last 18 months, with
    nearly 20 percent of VoIP callers experiencing unacceptable voice
    quality, according to a survey done by Brix Networks.
    The results come from Brix Networks' TestYourVoIP.com site, a free
    VoIP quality-testing portal. Brix claims that nearly one million VoIP
    phone tests have been conducted at the site since its March, 2004
    launch.

    Brix claims that from late 2004 through mid-2006, the tests done at the
    site have shown a consistent decrease in overall voice quality as
    calculated via the Mean Opinion Score (MOS). MOS is an a measurement of
    conversational voice quality that rates calls on a scale from one (bad)
    to five (excellent). Test calls with a MOS of 3.6 or better are usually
    regarded as being satisfactory, and those below it as unsatisfactory.
    Only 81 percent of VoIP calls tested on the site were rated at 3.6 or
    better, the company says.

    How accurate are the results? Without a third party to analyze them,
    it's difficult to know. Brix, though, sells IP and VoIP testing
    solutions, and the company does have a vested interest in touting any
    results that show poor VoIP quality. On the other hand, anyone who has
    made a VoIP call knows only too well the sometimes erratic nature of
    call quality.
    - By Networking Pipeline Staff

    For Further Information : www.knowingabout.com/voip
    KnowingAbout.com, Jul 27, 2006
    #1
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  2. KnowingAbout.com

    Lena Guest

    KnowingAbout.com wrote:
    > VoIP call quality has taken a nosedive over the last 18 months, with
    > nearly 20 percent of VoIP callers experiencing unacceptable voice
    > quality, according to a survey done by Brix Networks.


    And in order to let them test your VOIP, they get in to your computer
    to make the call? No thanks.

    "TestYourVoIP.com will make a call from wherever you are to one of our
    U.S. or international test locations and report the results for free.
    It'll only take about 20 seconds if you have Java installed."

    I test my VOIP every time I make or receive a call, and mine is 100%
    perfect.
    I continually read Broadband Reports on VOIP and have not read about
    any such nonsense.
    I am suspicious about the motives in re-publishing or plagerizing that
    report.

    Lena
    Lena, Jul 28, 2006
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    FTR Guest

    Lena wrote:
    >
    > I test my VOIP every time I make or receive a call, and mine is 100%
    > perfect.
    >


    How do you do that, Lena ?
    FTR, Jul 28, 2006
    #3
  4. KnowingAbout.com wrote:

    > How accurate are the results? Without a third party to analyze them,
    > it's difficult to know.


    Blame the poor and cheap ISPs. From my location in Germany, I'm getting
    a MOS of 4,2 to Sydney, 4,3 to San Jose and 4,4 to all other
    destinations. I'm finding it odd though, that the delay to Sydney
    (>300ms routed via New York, Sacramento, CA and back to Ashburn, VA)
    does not have a greater impact on the calculated MOS.

    Tor
    Tor-Einar Jarnbjo, Jul 28, 2006
    #4
  5. KnowingAbout.com

    FTR Guest

    Tor-Einar Jarnbjo wrote:
    > KnowingAbout.com wrote:
    >
    >> How accurate are the results? Without a third party to analyze them,
    >> it's difficult to know.

    >
    > Blame the poor and cheap ISPs. From my location in Germany, I'm
    > getting a MOS of 4,2 to Sydney, 4,3 to San Jose and 4,4 to all other
    > destinations. I'm finding it odd though, that the delay to Sydney
    > (>300ms routed via New York, Sacramento, CA and back to Ashburn, VA)
    > does not have a greater impact on the calculated MOS.
    >
    > Tor

    What is a MOS, how do you measure it? For a non-engineer it is difficult
    to understand this
    - Frank
    FTR, Jul 29, 2006
    #5
  6. FTR wrote:

    > What is a MOS, how do you measure it? For a non-engineer it is difficult
    > to understand this


    Mean Opinion Score. It's a measurement for line quality, commonly based
    on personal evaluation, but TestYourVoIP is using an automated process
    (probably taking packet loss, delay and jitter in consideration) for
    calculating it. 4.4 is the best MOS technically possible for a regular
    phone call:

    http://testyourvoip.com/faq.html#mos

    Tor
    Tor-Einar Jarnbjo, Jul 31, 2006
    #6
  7. KnowingAbout.com

    Lena Guest

    FTR wrote:
    > Lena wrote:
    > > I test my VOIP every time I make or receive a call, and mine is 100%
    > > perfect.

    >
    > How do you do that, Lena ?


    "Mean Opinion Score. It's a measurement for line quality, commonly
    based
    on personal evaluation,.."
    I'm mean and opinionated, and I personally evaluate every call as it
    sounds in my ears. That's what's important to me.

    Lena
    Lena, Jul 31, 2006
    #7
  8. KnowingAbout.com

    FTR Guest

    Lena wrote:
    > FTR wrote:
    >
    >> Lena wrote:
    >>
    >>> I test my VOIP every time I make or receive a call, and mine is 100%
    >>> perfect.
    >>>

    >> How do you do that, Lena ?
    >>

    >
    > "Mean Opinion Score. It's a measurement for line quality, commonly
    > based
    > on personal evaluation,.."
    > I'm mean and opinionated, and I personally evaluate every call as it
    > sounds in my ears. That's what's important to me.
    >
    > Lena
    >
    >

    Thanks! The MOS is the 'I hear you five' from the old radio telephone
    days in the military. I didn't know the term.

    Now that we know that 4.4 is the highest level that you get with VoIP
    what is the level of a goog analogue landline?

    I must admit that with Skype PC-PC calls here in Europe you get an
    excellent voice quality, sometimes even better than traditional
    landline. When you use SkypeOut for PC-landline the sound quality drops
    so considerably that I can't use SkypeOut for business calls: the worst
    is that the beginning of words are often cut. Also the transmitted voice
    frequency is limited. You can even hear the loss of quality. So, this is
    why I ask: when comparing VoIP services which one provide an acceptabmle
    quality when the call terminates on a landline?

    However, as someone who works with stats everyday: using a mean for
    skewed data as the MOS does is a procedure that is just - bad. Any
    student that proposes this is a stats course would get 0/5 points.

    - ft


    --
    /me is listening to (Artist - Back In The Days-60's 70's & 80's-Live D.J.) at (Chilly's Vibes/Real Old School Radio/A Smooth Blend Of Funk,Disco,R&B,& Motown/From The 60's 70's & 80's) using Screamer Radio v0.3.7

    <a href="http://www.spreadfirefox.com/?q=affiliates&id=0&t=61"><img border="0" alt="Get Firefox!" title="Get Firefox!" src="http://sfx-images.mozilla.org/affiliates/Buttons/110x32/trust.gif"/></a>
    FTR, Jul 31, 2006
    #8
  9. KnowingAbout.com

    kyron Guest

    sipgate is currently doing very poor andyet my scores are high andwith
    sipgate it is painfull
    ---
    External Post from http://ukvoiptalk.com
    kyron, Aug 1, 2006
    #9
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