Top 6 VoIP Phones

• Features include:
• Corded Base Keypad and Duplex Speakerphone
• 5.8GHz Digital Expandable (up to 10 handsets) System
• Extra Caller ID Handset and Charger included
• Cordless Handset & Base Speakerphone
• Programmable CID or Memory Locations at handset and base.
• Do Not Disturb Setting
• Transfer Memory Locations between Handsets
• New Message Waiting Indicator with Alert Tone Options
• 20 Distinctive Ring Options 

• Features include:
• Headset compatible; 2-year warranty
• IEEE 802.11b wireless standard; 2.4 GHz signal
• Site Survey; 64/128-bit WEP encryption
• Caller ID/call waiting compatible, display and dial
• Redial, hold; speaker volume control

• Features Include:
• Two Handsets
• Speakerphone on each phone
• Headset compatible
• Caller ID and Voice Mail Indicator

•  Features Include:
•  Standard and Protocol
•  IEEE 802.3 /802.3 u 10 Base T / 100Base TX
•  Major G.7XX and gsm610 audio codec
•  H.323 V4
•  MGCP RFC2705
•  SIP RFC2543
•  Net2phone private protocol
•  TCP/IP: Internet transfer and control protocol
•  RTP: Real-time Transport Protocol
•  RTCP:Real-time Control Protocol
•  VAD/CNG save bandwidth
•  DHCP:Dynamic Host Configuration Protocol
•  PPPoE:Point to Point Protocol over Ethernet
•  DNS:Domain Name Server
•  Telnet:Internet's remote login protocol
•  FTP:File Transfer protocol
•  HTTP:Hyper Text Transfer protocol

• Features Include:
• Support SARP/RARP, ICMP, DNS, DHCP, NTP, TFTP protocols
• Support NAT traversal via STUN & symmetric RTP
• Interoperable with various 3rd party SIP end user device, Proxy/Registrar/Server, and gateway 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 Caller ID Display or Block, Call Waiting, Hold, TransfForward, 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-fredomain acoustic echo cancellation (pending), redial, call log, volume control, voice mail with indicator, 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 (802.1Q VLAN, 802.1p) and Layer 3 QoS (ToS, DiffServ, MPLS)
• NAT-friendly remote software upgrade capability (via tftp) even from behind firewalls/NATs.
• Support for fail-over SIP server and DNS server (pending)

• Features Include:
• Two RJ45 10Base-T Ethernet ports
• Support SARP/RARP, ICMP, DNS, DHCP, NTP, TFTP protocols
• Support NAT traversal via STUN & symmetric RTP
• Interoperable with various 3rd party SIP end user device, Proxy/Registrar/Server, and gateway 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 Caller ID Display or Block, Call Waiting, Hold, TransfForward, 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-fredomain acoustic echo cancellation (pending), redial, call log, volume control, voice mail with indicator, 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 (802.1Q VLAN, 802.1p) and Layer 3 QoS (ToS, DiffServ, MPLS)
• NAT-friendly remote software upgrades capability (via tftp) even from behind firewalls/NATs.
• Support for fail-over SIP server and DNS server (pending)