We have tried to use the local serial port with modem attached using RealPort driver directly to VMware. Looks like its working fine but after a while (modem extensively dialing remote destinations) AnywhereUSB stops responding 
(red status light come up and change to amber after a while - this is repeating until we remove power thus restarting HW appliance)
Question is if there are any special configuration steps necessary using modem over RealPort driver. I see there are many settings which we left to default.
Thanks.
Marcel