[asterisk-users] Asterisk voice quality tuning

[Joe Pukepail]

I will try to answer it this way:

G.711 is toll quality voice, if everything is functioning properly should be
almost identical to a regular phone call.

You will need to do trouble shooting to (in the words drilled into me by an
old boss): isolate, identify and quantify the issue.   I would start by
setting up a record/playback extension, call it from PSTN and call it from
the SIP phones, see where the noise is being introduced, from there could be
hundreds of different things (LAN congestion, interrupt sharing on the PSTN
card, bad wiring, faulty switch, etc).

So to answer your question there isn't a parameter that says "Noise=Yes/No",
you need to: isolate, identify and quantify the noise.

On 9/14/07, satish patel <satish_patel_2000_2000 at yahoo.com> wrote:
>
> I have both type of call sip-2-pstn and pstn-2 -sip   but  quality is not
> good so  how to check asterisk voice quality and codec quality i am useing
> G.711 alaw and ulaw and it is my LAN network so is there any specific
> perameter or option  to improve quality of voice ???
>
> *Adrian Marsh <Adrian.Marsh at ubiquisys.com>* wrote:
>
> Satish,
>
> Whats your network setup? Do you get bad quality on internal-asterisk
> calls, or only on external calls? Are you making pure IP calls (sip2sip), or
> are there E1/T1 cards involved? What codecs are you currently using? What
> devices are you using?
>
> Adrian Marsh
>
> ________________________________________
> From: asterisk-users-bounces at lists.digium.com [mailto:
> asterisk-users-bounces at lists.digium.com] On Behalf Of satish patel
> Sent: 14 September 2007 06:48
> To: asterisk-users at lists.digium.com
> Subject: [asterisk-users] Asterisk voice quality tuning
>
> Dear all
>
>               I have asterisk 1.4.11 on CentOS. I have SIP IP phone
> arround 100 but i got Noice on voice call so what would be the resone and
> how to fine tune my voice quality on asterisk ?? what codec would be best
> for my asterisk
>
>
>
>
> ________________________________________
> Catch up on fall's hot new shows on Yahoo! TV. Watch previews, get
> listings, and more!
>
> _______________________________________________
>
> Sign up now for AstriCon 2007! September 25-28th. http://www.astricon.net/
>
> --Bandwidth and Colocation Provided by http://www.api-digital.com--
>
> asterisk-users mailing list
> To UNSUBSCRIBE or update options visit:
> http://lists.digium.com/mailman/listinfo/asterisk-users
>
>
>
>
> ------------------------------
> Catch up on fall's hot new shows<http://us.rd.yahoo.com/tv/mail/tagline/falltv/evt=47093/*http://tv.yahoo.com/collections/3658+%0A>on Yahoo! TV. Watch previews, get listings, and more!
>
>
> _______________________________________________
>
> Sign up now for AstriCon 2007!  September 25-28th.
> http://www.astricon.net/
>
> --Bandwidth and Colocation Provided by http://www.api-digital.com--
>
> asterisk-users mailing list
> To UNSUBSCRIBE or update options visit:
>   http://lists.digium.com/mailman/listinfo/asterisk-users
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20070914/0500906e/attachment.htm