Support SIP V1 (RFC2543), V2 (RFC3261)

Provide 1xWAN, 1xLAN

Perfect sound quality: VAD(Voice Activity Detection), CNG(Comfortable Noise Generator), LEC(Line Echo Canceller), Packet Loss Compensation, Adaptive Jitter Buffer

Support IP/TCP/UDP/RTP/RTCP, ICMP/ARP/RARP/SNTP

Support TFTP Client/DHCP Client/ PPPoE Client, Static IP

Support Telnet/HTTP Server, DNS Client

Support Codec G.711, G.723, G.726, G.729A and G.729B

Router function

PoE (Power Over Ethernet) – optional

Call Hold, Call Waiting, Caller ID, 3-way Conference, DND

Call forward (all forward, busy forward and no answer forward.

In-Band DTMF, Out-of Band DTMF, SIP Info

Registrar Server (three SIP Account)

Speaker Phone, Speed dial, Phone book, Flash and Volume Adjustment function

HTTP 1.1 basic/digest authentication for Web setup

MD5 for SIP authentication (RFC2069/ RFC 2617)

QoS: ToS field

NAT Traversal : STUN

Web Browser, Telnet, Keypad Configuration

TFTP, Telnet, HTTP firmware upgrade