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Features
- Headset
port
- SIP 2.0, TCP/UDP/IP, RTP/RTCP, HTTP, ARP/RARP, ICMP, DNS,
DHCP, NTP, TFTP protocols
- NAT traversal using IETF STUN and symmetric RTP (compatible
with Cisco’s ATA-186, etc)
- Interoperable with various 3rd party SIP end user device,
Proxy/Registrar/Server, and gateway products (e.g., MS Messenger,
Cisco IP phone and gateway, etc)
- Advanced Digital Signal Processing (DSP) to ensure superb
hi-fidelity audio quality
- Advanced and patent pending adaptive jitter buffer control,
packet delay and loss concealment technology
- Popular vocoders including G.723.1 (5.3K/6.3K), G.729A/B,
G.711 (a-law and u-law), G.726, G.728. Dynamic negotiation
of codec and voice payload length
- Standard voice features such as Caller 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
- Silence Suppression, VAD (Voice Activity Detection), CNG
(Comfort Noise Generation), Line Echo Cancellation (G.168),
and AGC (Automatic Gain Control)
- 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 (802.1Q VLAN, 802.1p) and Layer 3 QoS
(ToS, DiffServ, MPLS)
- NAT-friendly remote software upgrade capability (via tftp)
even from behind firewalls/NATs
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