asterisk users - Feb 2011 - voice quality measurement using dahdi_monitor

hi group ,

i am working on dahdi_monitor for measuring voice quality , so i want to
know that on which data i can tell that this PRI
lines are working properly, is there any measurement on basis of that i can
make MOS. i am working from last 2-3 days
but i only get idea about making .raw file and making .wav file and visulal
mode of RX and TX of PRI line.

what i want is measurement of voice quality so that i can talk with provider
that i am getting % of voice quality.i am sure there is
some better way to solve or debug .raw file and taking a decision.


let me help please to solve and finding problem of voice quality.


regards
Dhaval
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Hi,

The question is can you record the audio to evaluate its quality? There is
intrusive approach when you have a reference file that you can test against the
recorded audio, or non-intrusive approach, which allows you evaluate voice
quality of any call recording (no reference needed). Both correspond to ITU-T
standards: P.862 for intrusive and P.563 for non-intrusive, or to Sevana AQuA
(for intrusive) and Sevana NIQA (for non-intrusive).

The difference is that all ITU-T recommendations related to voice quality
measurement are quite expensive and involve annual royalties, but they are
recognized standards. Sevana products are not recognized standards, but are used
by many happy customers doing call quality assessment in VoIP, PSTN and mobile
networks.

Welcome to our web site: http://www.sevana.fi for further information and
customer references (many are Asterisk owners) or just contact us directly.

Best Regards,
Sevana Oy
Finland
  ----- Original Message ----- 
  From: DHAVAL INDRODIYA 
  To: Asterisk Users Mailing List - Non-Commercial Discussion 
  Sent: Friday, February 04, 2011 12:53 PM
  Subject: [asterisk-users] voice quality measurement using dahdi_monitor


  hi group ,

  i am working on dahdi_monitor for measuring voice quality , so i want to know
that on which data i can tell that this PRI
  lines are working properly, is there any measurement on basis of that i can
make MOS. i am working from last 2-3 days
  but i only get idea about making .raw file and making .wav file and visulal
mode of RX and TX of PRI line.

  what i want is measurement of voice quality so that i can talk with provider
that i am getting % of voice quality.i am sure there is
  some better way to solve or debug .raw file and taking a decision.


  let me help please to solve and finding problem of voice quality.


  regards
  Dhaval



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Am 04.02.2011 10:53, schrieb DHAVAL INDRODIYA:
> hi group ,
>
> i am working on dahdi_monitor for measuring voice quality , so i want 
> to know that on which data i can tell that this PRI
> lines are working properly, is there any measurement on basis of that 
> i can make MOS. i am working from last 2-3 days
> but i only get idea about making .raw file and making .wav file and 
> visulal mode of RX and TX of PRI line.
>
> what i want is measurement of voice quality so that i can talk with 
> provider that i am getting % of voice quality.i am sure there is
> some better way to solve or debug .raw file and taking a decision.
>
>
> let me help please to solve and finding problem of voice quality.
Show us:
/etc/init.d/wanrouter hwprobe