voip sip phone, Manufacturers and voip sip phone, Suppliers

Voip Sip phone(NXD-804)Key Features:
1. Support 1 line for VoIP call, SIP(RFC2543, ARFC3261); PhoneBook with 100 groups memory;

2. Network Protocol: TFTP Client/DHCP Client/ PPPoE Client; Telnet/HTTP Server; DNS Client; IP / TCP / UDP / RTP / RTCP; IP / ICMP / ARP / RARP / SNTP;

3. Voice Quality: VAD: Voice activity detection; CNG: Comfortable noise generato; LEC: Line echo canceller; Packet Loss Compensation; Adaptive Jitter Buffer;

4. Codec: G. 711: 64k bit/s (PCM); G. 723. 1: 6. 3k / 5. 3k bit/s; G. 726: 16k / 24k / 32k / 40k bit/s (ADPCM); G. 729A 8k bit/s (CS-ACELP); G. 729B: Adds VAD & CNG to G. 729;

5. Call Function: Call Hold; Call Waiting; Call Forward; Caller ID; 3-way conference

6. DTMF Function: In-Band DTMF; Out-of Band DTMF; SIP Info;

7. SIP Server: Registrar Server (three SIP account); Outbound Proxy;

8. Phone Function: Volume Adjustment; Speed dial, Phone book; Flash; Speaker Phone;

9. IP Assignment: Static IP and DHCP; PPPoE support for ADSL or Cable modem;

10. Security: HTTP 1. 1 basic/digest authentication for Web setup; MD5 for SIP authentication (RFC2069/ RFC 2617);

Voip Sip phone (NXD-804)Support POE Key Features:
1) IEEE 802. 3af compliant input interface;

2)Complete input / output isolation;

3) Efficiency: 78% minimal; Over load & short circuit protection;

Voip Sip phone (NXD-804)Electric Spec:
1)Support POE (Power over Ethernet) RoHS / CE /FCC compliant;

2) Ethernet Port --- 2 X 10/100MHz Ethernet Port; AC/DC power adapter, 12V DC; DC input: 12V DC/1200A;