I am using Softphone 5.2 with an S8710 CM 3.0.1. My medpro and CLAN cards all have the latest firmware. I am experiencing Audio clipping when I go off-hook. The clipping starts as soon as I get dialtone. The Medpro, CLAN, and IP Softphone computer are all on the same LAN so there is little chance that this is network related (All are connected to a Cajun P133 with the port speeed/duplex locked down). Any ideas on what I can check?