I`m using infrared ports for network and have not problem with HF interfirence from full power AMP. No need connect cable COM to COM. Distance between computers abt 2-3 m. 73! Igor / RZ3BW rz3bw@com2com.ru -- Submissions: ct-user@contesting.com Administrative requests: ct-user-REQUEST@contesting.com WWW: http://www.contesting.com/ct/ Questions: owner-ct-user@contesting.com