ZyXEL's P-2002 is an Analog Telephone Adapter (ATA) that provides customers with an easy-to-use solution for Voice over IP service deployment. Connecting a traditional phone set to the POTS phone port of the P-2002 series instantly establishes an IP phone device, allowing users to place VoIP calls without the use of a PC. Based on industry standard SIP (Session Initiation protocol, RFC 3261) call control protocol and sophisticated voice compression technology, the P-2002 series offers smooth IP-based voice communication with superb sound quality. ZyXEL's P-2002 series Analog Telephone Adapter is an ideal solution for IP Telephony service deployment as well as SOHO and Home VoIP applications.