The ATA-100 is an analog telephone adapter that connects an analog telephone device to an IP network, enabling SIP-supported VoIP communication in applications where connecting to an existing FXS port is not possible or practical. In addition, the ATA-100 has an RJ-11 port for switching to the PSTN analog phone network via touch tone commands. Device programming is handled by a built-in web browser. IP address assignment can be accomplished either by DHCP or by manually assigning a static IP address. The ATA-100 can be used with or without SIP registration. If unregistered, the ATA-100 can perform basic tasks like sending voice data to an IP-PBX or to another device on a LAN. SIP registration opens up an impressive list of calling features and also enables internet telephone calling. Applications: Link between an analog phone or doorbox and an IP-PBX Voice communication on analog phones between two networked locations (requires two ATA-100"s) VoIP internet calling Internet enabled kiosks Features: Supports SIP 2.0(RFC 3261), TCP/UDP/IP, RTP/RTCP, HTTP, ICMP, ARP, DNS, DHCP, NTP, PPPoE, STUN, TFTP, etc. Powerful digital signal processing (DSP) to ensure superb audio quality. Supports various codecs including G.711 (a-law and u-law), G.723.1 (5.3K/6.3K), and G.729A/B Supports out-of-band DTMF via RTP (RFC2833) or SIP INFO. Supports Caller ID/Name display. Supports Call Hold, Call Waiting/Flash, Call Transfer, and Call Forward. Supports automated NAT traversal without manual manipulation of firewall/NAT Supports QoS Supports device configuration via built-in IVR or Web browser Supports firmware upgrade via FTP Specifications: Power: 100-240V AC, 50-60 Hz 0.3A, power cord supplied WAN Interface: 1xRJ45 100Base-T LAN Interface: 1xRJ45 100Base-T FXS Telephone Port: 1xRJ11 PSTN Port: 1xRJ11 LED: VoIP/PSTN, POWER (The POWER LED is green. The VoIP/PSTN LED is bicolor yellow/green.) Dimensions: 118mm (W) x 74mm (D) x 28mm (H) Shipping Weight: 0.45 kg (1 lb) Temperature: 0deg C to 40deg C Humidity: 10% to 95% (noncondensing)