光遥控电台的话可以用ip-sound
http://xoomer.virgilio.it/ham-radio-manuals/ips-v0.57a-finale.zipit has multiple gsm and pcm codecs built in as well as a small tcp client with dns support.
step-by-step ip-sound setup guide:
1, install the ip-sound on both computers.
2, on the server (the one connected to your radio), go to properties and check "auto-answer" and uncheck "restrict auto-answer to client list ip numbers" unless you have a private lan and have static ip addresses for both pcs. under "sound" make sure you select the audio card that has the radio connected to.
3, on the remote pc, press client/add and enter the client address window. you can add the addresses of the server. several addresses can be given here. dns support is built in.
4, open the selected port on the router. be aware of bidirectionality in case of nat, and make sure you let udp through.
5, connect