PJMEDIA Quality Issue

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On 10/11/2011 04:42 PM, Austin Einter wrote:
> Hi List
> Please respond.
> -Austin
>
> On Tue, Oct 11, 2011 at 6:12 AM, Austin Einter 
> <austin.einter at gmail.com <mailto:austin.einter at gmail.com>> wrote:
>
>     Hi
>     I am finding some PJ Media quality issue. Need your suggestion to
>     overcome this.
>     The scenario is as below.
>     I have PJSIP UA one side.
>     One intermediate SIP+RTP proxy (Kamailio 3.1.5 and RTP Proxy 1.2.1).
>     I have another main proxy doing registrar, accounting as well as
>     acting as a gateway between PSTN, GSM and IP domains.
>     Now if I make a call from PJSIPUA to a  mobile phone, I am finding
>     audio at PJSIP UA is good. However media at mobile phone is bad.
>     Did anybody face this issue anytime?
>     To narrow down the problem, I removed intermediate SIP+RTP proxy.
>     So now the scenario is PJSIP UA --> Main proxy --> Mobile phone.
>     With this setup I find audio quality is god bothway.
>     If somebody has observed this issue anytime, please help me to
>     solve this issue.
>     Thank you in advance
>     Austin
>
>
>
>
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Without thinking too much, I'd say the problem is with the proxy
(if any) if it works fine without it now.
Try to verify this by capturing the RTP streams on both sides using 
Wireshark.
Wireshark allows you to play captured RTP streams.

Regards

-- 
Dipl.-Ing. (FH) Andreas Wehrmann
Software Development
--------------------------------------------------------------
Center Communication Systems GmbH
A-1210 Wien, Ignaz-K?ck-Stra?e 19
Sitz in Wien
FN 796 88p, Firmenbuchgericht Wien
www.centersystems.com

Tel.: +43 (0) 190 199 - 3616
Mobile: +43 (0) 664 884 75916
Fax: +43 (0) 190 199 - 2110
E-Mail: a.wehrmann at centersystems.com

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