I have 30 phones plugged into one linksys switch. cm 4.1 plugged into the same switch, PCs daisy chain off the back of the phone. G.711 is used and all ports are hard set to 100mb. but on a number of internal calls I get clipped voice, if some one is counting to 10 it goes 1,2,3,4,5,,7,8,9,10. I have auto qos set on the switches no duplex errors or speed errors on the ports, disabled VAD. ping test show round trip delay of 2 ms and no packet drops when sending over 200 packets
What other tests can I do before I swap out the switch?