Voip
SIP 2.0 ( RFC3261) and correlative RFCs..
Full duplex hands-free speaker phone.
NAT transverse support STUN client.
SIP support SIP domain, SIP authentication ( none, basic, MD5) , DNS name of server,
Peer to Peer/ IP call.
SIP support 2 SIP lines or only one IAX2 lines. Can connect to SIP1 and SIP2 server at the same time DTMF Support SIP info, DTMF Relay, RFC2833.
SIP application: support Call forward/ transfer/ holding/ waiting / 3 way talking/ paging
and intercom/ pickup/ join call/ click to dial/ call park.
Call control features: Flexible dial map, Hot line, empty calling reject, Black list for reject
authenticated call, limit call, No disturb, Caller ID.
Support Phonebook 500 records
Incoming calls / Outgoing calls / Missing calls. Each support 100 records
Support conference and voice record on SIP server
10 kind of ring type
Support SRTP
Support MWI

Voice
Codec: G.711 A/ U Law, G.722, G.723, G.729,
Echo cancellation: Support G.168, and Hands-free can support 96ms, Hand free Speaker Phone.
Support Voice Gain Setting, VAD, CNG

Networking
WAN/ LAN: Support Bridge and Router model
Support basic NAT and NAPT
Support PPPoE for xDSL
Support DHCP Client on WAN
Support VLAN ( optional: voice vlan/ data vlan)
QoS with DiffServ
Support DMZ
Support main DNS and secondary DNS server
Support DNS Relay, SNTP Client, Firewall
Network tools in telnet server: Including ping, trace route,
telnet client

Protocols
MAC Address
TCP: Transmission Control Protocol
DHCP: Dynamic Host Configuration Protocol
PPPoE: PPP Protocol over Ethernet
SNTP, Simple Network Time Protocol
STUN - Simple Traversal of User Datagram ...
MD5 Message-Digest Algorithm
DNS: Domain Name Server
RTP: Real-time Transport Protocol
RTCP: Real-time Control Protocol
Telnet: Internet' s remote login protocol
HTTP: Hyper Text Transfer protocol
FTP: File Transfer protocol
TFTP: Trivial File Transfer Protocol

Maintenance and Management
Web , telnet and keypad management
Management with different account right
Upgrade firmware through POST mode
Upgrade firmware through HTTP, FTP or TFTP.
Telnet remote management/ Upload/ download setting file
Safe mode provide reliability
Supoort Auto Provisioning ( upgrade firmware or
configuration file)
Support Syslog