2.4G Digital Cordless VOIP Phone (GK921)

Product Description

1. 2.4GHz Frequency-Hopping Spread Spectrum
2. Up to 6 handsets
3. Auto answer on removal from base
4. 15 ringer options
5. Baby Call, Room Monitor, Walkie Talkie
6. Supported protocols: SIP(RFC2543, RFC3261), TCP/UDP/IP, PPPoE, RTP/RTCP, HTTP, ARP/RARP, ICMP, DNS, DHCP(Server/Client), NTP/SNTP, TFTP/FTP
7. Two 10/100M Ethernet ports, support NAT and Bridge mode
8. Voice codecs: G.711a/u, G.723.1, G.729A/B, G.726
9. Voice quality enhancement: QoS, VAD, CNG, Adaptive Jitter Buffer, G.165 16ms Echo Cancellation
10. Support 3 SIP accounts
11. NAT traversal: STUN, Outbound proxy
12. Auto configuration and upgrade via TFTP, FTP, HTTP; manual configuration via keypad, webpage, and Telnet
13. Extensive phone features: Caller ID, Call Waiting, Music on Hold, Call Transfer (attended/blind), Do-Not-Disturb, Call Forwarding, Dial Plans, Speed Dial, 3-Way Calling, Phonebook, Call Log, Hands-free, Call timer, Send Anonymous CID, etc.
14. User authentication
15. Signaling tone of ITU-T standard, DTMF detection and generation
16. Support T.38 fax, VLAN, DMZ, DDNS, Mac Clone, Virtual Server, SIP Encrypt