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Software features:

 Support Agreement ¾? SIP 2.0 (RFC 3261), TCP / UDP / IP, RTP / RTCP, HTTP, ICMP, ARP / RARP, DNS, DHCP (client and server), NTP, PPPoE, UPNP, STUN, TFTP, etc. ;

 ¾? uses advanced digital signal processing (DSP) technology to ensure high-fidelity sound quality and a good third-party SIP-compliant end-user devices, agent / registered, such as servers and media gateway products;

 ¾? routing

 ¾? high-quality voice quality;

 ¾? supports a wide range of popular voice codecs including G.711 (a law and u law), G.723.1 (5.3K/6.3K), G.726 (40K/32K/24K/16K), G.728, G.729A / B and LBC (pending); and consultation supports dynamic speech coding and voice payload length

 ¾? supports standard voice features: Caller ID / anonymous dial-up, not scrambling, call waiting, call hold, call forwarding, auto response, speed dial, picking machine features a dial-up;

 ¾? support full-duplex hands-free, redial, call recording, volume control, voice mail prompts to download ring tones, phone book, sound recording and other functions;

 ¾? support for MD5 authentication and encryption algorithm;

 ¾? support VAD (Silent Detection), CNG (comfort noise), G.168 (echo suppression), and AGC (Automatic Gain Control);

 2-story ¾? support 802.1Q VLAN, 802.1p, as well as 3 layer QoS (ToS, DiffServ, MPLS);

 ¾? support STUN and symmetric RTP for NAT penetration approach;

 Simple ¾? support manual configuration mode (phone keyboard), Web configuration mode and auto-configuration mode (to be downloaded through HTTP or TFTP configuration file has been set up good);

 ¾? support through TFTP or HTTP for software upgrades;

 DNS SRV records ¾? support inquiries and SIP server functions Fail Over
Hardware features:

 ¾? LCD for the 80mm × 39mm, sub-four lines showed that 16 characters per line

 ¾? support 2-way call

 Feeder power ¾? support (PoE optional) Standard 802.3af, access to power through the Ethernet. Note: any time, insert the power adapter once the phone's power jack, Unicorn4102 will obtain power from the power adapter.

 ¾? support headset functionality, insert the headphone jack headphones, the audio will automatically switch to the headphones in (optional);

 ¾? host PC of the LAN ports and ports to support full-duplex and half-duplex 10/100M auto-switching, and Ethernet with automatic polarity detection function, to support the direct and cross-wire connection;

 Support the message waiting prompt ¾? LED.