What your wanting to do is to turn your computer into a repeater with a forward and reverse auto patch. It's really easy to do with the software at this link. http://www.synergenics.com/sc/
You might also look at some VMB (Voice Mail Box) software used with voice and data modems used with dialup telephone lines. You can tell if there voice capable as there will be audio in and out jacks along with the line connector. These are for connection to a sound card and you can place a "Y" connector and a sound card interface so you can connect your transceiver up to the computer turned VMB controller. This would allow you to dial out and make phone calls and access a very suffocated VMB controller for voice mail. Some of the software has voice recognition so you could control it simply by talking to the VMB machine via your transceiver.