I am running 3CX on a laptop connected to a Cisco switch talking to other laptops, extension-to-extension. When I speak into one of the laptop headsets I get a lag of about 1/2 second before I hear my voice from the other laptop. If I dial *777 and listen directly to my own voice on the same computer I still get a lag of about 1/4 second. Does anyone know what could be causing this lag, half within the 3CX Phone 6 softphone software and over the network? Thanks.