Audio problems.

[evo8]

We are running 3 sip trunks (VoiceFlex) on our 3cx (P4 2.2 with 1Gb ram XP pro) and currently only 3 extensions. When only one extension is being used for an external call it works fine, but as soon as another call comes in the audio on the call is illegible, I suppose you could call it jitter. The internet is not being used very much and the switch has qos configured for those devices. Any ideas?

 

[leejor]

Have you run a speed test on your internet connection? Sometimes the download speed is much much greater than the upload speed. Is there a hub rather than a switch used on your network?

 

[evo8]

The switch is a ProCurve 2626 and the phones and PC's have their own ethernet ports. The router reports that it is connected at 3072kbps with an upload of 832kbps (last time I checked the speeds were 2.2Mbps and 0.69Mbps).