Use the Internet for Long-Distance Calls
        
        
        
        With WebTalk, a PC can be used                  just like a telephone for two-way voice                  conversations. The product supports full-duplex                  (two-way, real-time) transmission; its internal VOX                  technology works with half-duplex sound cards to                  emulate full-duplex quality.
                                    The WebTalk Server Network                  provides a directory of other online callers and                  lists Virtual Meeting Places where people can find                  callers with common interests.
                                    The software works over an                  ordinary phone line. A 16-bit sound card, speakers                  and microphone, and 14.4 or faster modem are                  required. Quarterdeck Corp., Marina del Rey, CA,                  (310) 309-4210, www.quarterdeck.com/. B