ATM over qos for voice

Unanswered Question
May 7th, 2008
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i would like to tune my qos that its on the ATM links,i used to strict priority policy on pvc's also adjust tx-ring limit as an 20

for 512 K links.On attachment looks like ok for audio packets.But when i fill the line with traffic,voice getting noisy and truncated.Any suggestion for preventing this issue ?

Regards



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paolo bevilacqua Wed, 05/07/2008 - 11:53
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How the service parameters are set on the PVC ?

paolo bevilacqua Thu, 05/08/2008 - 02:49
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Seem strnage you have no parameters for vbr-nrt. You should have SCR and MBS.

Joseph W. Doherty Thu, 05/08/2008 - 04:29
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I recall there's a general guideline for bandwidth less than 768 you'll need something like LFI because of serialization delays caused by large packets. Not sure such is easily availble with ATM, so you'll probably need to have another PVC defined and dedicated to your voice, ideally a cbr or vbr-rt PVC.

tdorduncu Mon, 05/19/2008 - 09:38
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i think problem was solved with adjusting tx-ring limit as 4 part.Now voice packets arrives more efficiently.Ä° asked telco that we used to vbr-rt and encapsulation is aal5snap.


Thanks for advices

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