Quarterdeck Corp is coming to market with the third product that is claimed to provide full-duplex telephony over the Internet. The Santa Monica, California company calls the thing the Quarterdeck WebPhone, and says it will be available in retail stores in October, bundled with a free copy of the Mosaic Web browser – all for under $50. WebPhone uses a standard telephone line and 14.4Kbps or higher speed modem. The product was developed with the help of Intelligence At Large Inc, Lernout & Hauspie Speech Products NV and Prospero Systems Research Inc. Belgian company Lernout & Hauspie provides the speech coder-decoder, Prospero developed server network software that enables caller connections to be made seamlessly, and Intelligence At Large contributes teleconferencing technology; Quarterdeck says it has also made a strategic investment in Intelligence At Large.