Point-to-Point (PPP) networking is used for all dial-up communication between the Metasys client computer (web browser) and the Metasys server and engine. Newer models of network engines and the latest release of Metasys Server software do not support communication over modems. If you have an older system, refer to the Metasys System Extended Architecture Direct Connection and Dial-Up Connection Application Note (LIT-1201639) for more information.