ZyXEL's Prestige 2002 is an Ethernet to traditional phone adaptor, which provides customers an easy-to-use solution for Voice over IP service deployment. By connecting to the Prestige's POTS phone port, the traditional phone set becomes an IP phone device. It allows customers to place VoIP call without a PC. Base on industry open standard- SIP (Session Initiation Protocol, RFC 3261) call control protocol and sophisticated voice compression technology, the Prestige offers smooth IP-based voice communication with superb sound quality. It is an ideal solution for IP Telephony service deployment, also a suitable device for SOHO and Home VoIP application. The Prestige 2002L allows users to keep the PSTN phone service and VoIP service at the same time. When ATA power down happens or the VoIP service is not available, the outgoing phone call will be relay to PSTN automatically. When VoIP service is in using, users can place a call to PSTN by dialing pre-fix numbers. More, emergency calls or important calls can be relayed to PSTN automatically.