voip call quality

Associate
Joined
4 Nov 2002
Posts
902
Location
NE Scotland
I'm having random problems with call quality on a voip service, mainly with USB phones. Is there a product out there can monitor the performance or highlight where the bottleneck is happening.
 
The phones are USB but ru n on a sip protocol. Tv provide is voispeed and there are no large downloads in progress during during calls. We has a server in the I'm which connects to our isdn lines and the USB phones connect to pcs on tvlhe same network or over the Internet Ina different country, and these are the ones that are suffering from a drop in quality. We have 2mb adsl connection at the I'm end and a 4mb conn At the other. Pcs are connected to a wireles router.
 
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