Family Features
•Support SIP 2.0, TCP/UDP/IP, RTP/RTCP, HTTP, AEP/RARP, ICMP, DNS, DHCP, NTP, TFTP protocols
•Support NAT traversal via STUN & symmetric RTP
•Support SIP SIMPLE standard for Instant Messaging and Presence (Model 102D)
•Interoperable with various 3rd party SIP end user device, Proxy/Registrat/Server and gatgeway products
•Advanced Digital Signal Processing (DSP) to ensure superb hi-fidelity audio quality
•Advanced and patent pending adaptive jitter buffer control, packet delay & loss concealment technology
•Support popular vocoders including G.723.1 (5.3K/6.3K), G.729A/B, G.711 (a-law and u-law), G.726, G.728 and wide-band G.722 (Model 102D). Dynamic negotiation of codec and voice payload length
•Support standard voice features such as Called ID Display or Block, Call Waiting, Hold, Transfer, Forward, FLASH, in-band and out-of-band DTMF (RFC2833), Dial Plans, off-hook auto dial, configurable emergency dialing (e.g., 911), early dial, click-to-dial
•Support 3-way conferencing (Model 102D), full duplex hands-free speakerphone, superior frequency domain acoustic echo cancellation (pending), redial, call log, volume control, voice mail with indicatior, downloadable ring tone (pending)
•Support Silence Suppression, VAD (Voice Activity Detection), CNG(Comfort Noise Generation), Line Echo Cancellation (G.168) and AGC (Automatic Gain Control)
•Support DIGEST authentication and encryption using MD5 and MD5-sess
•Provide easy configuration thru manual operation (phone keypad and web interface) or personalized automated provisioning via central configuration file for mass deployment
•Support for Layer 2 (802 IQ VLAN, 802 Ip) and Layer 3 QoS (ToS, DiffServ, MPLS)
•NAT-friendly remote software upgrade capability (via tftp) even from behind firewalls/NATs
•Built-in alarm-clock, music on hold and downloadable music ringing tone (Model 102D)
•Support for fail-over SIP server and DNS server (pendign)