Re: VOIP Challenges...

Linux Advanced Routing and Traffic Control

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I'm new to QoS, so please be gentle (and yes, I've RTFM, though I don't understand every bit of it)
Here's the thing; I've tried several scripts--simple and complex--for classifying my Vonage traffic into a high-priority queue, but no matter what I do it doesn't seem to work. Right now I'm using the HTB script I'll include below, which is a mashing together of several scripts I've found along with a lot of the LARTC HOWTO stuff. Bottom line; if I load up my *outbound* connection and then try to make a Vonage call, my voice is so chopped up at the other end that noone can understand me.


Some others have pointed out a few errors, but can I just check whether it's only uplink that gets choppy?

Obviously first of all monitor your qdiscs to make sure traffic is being classified as expected, but after that do some testing on your VoIP app.

I tested www.sipgate.co.uk on my PC based softphone and frequently got choppy sound for the first 30 secs of the call and then it settled down. Curiously changing to one of these hardware devices, a Budgettone in my case, and now the quality is perfect in both directions. No changes in qos settings between the two...

Now, I haven't debugged this further, but I think the actual voip settings in the device may help/hinder when there is congestion.

Post some more info on your setup

Ed W
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