The price as low as USD 55.99 Voice Functions and Features

Protocol: SIP (RFC3261, RFC2543, RFC2327), IAX2
Supports 5 SIP accounts
Codec: G.711A/u, G.7231 high/low, G.729a/b
Echo cancellation: G.168
Supports Voice Gain Setting, Jitter Buffer, VAD, CNG
NAT transverse: support STUN client
Supports SIP domain, SIP authentication
Supports public and private server. Can connect to ISP & Private SIP server simultaneously
DTMF Relay (In-band/Out-band & SIP Info)
Supports 802.1P, 802.1Q VLAN


Calling Functions and Features

Full duplex hands-free speakerphone
Call forward/transfer/holding/waiting
Caller ID identification, Call History
Support Hotline
Empty calling No. reject service
Black list for reject authenticated call
No disturb (DND)
Support conference and voice record
3-way Conference
Group Listening
Voice Record

Network Functions and Features

WAN/LAN: Support Bridge and Router model
Supports basic NAT and NAPT
Supports PPoE for xDSL
Support DNS Relay, SNTP Client, Firewall
Supports DHCP Client on WAN
Network tools in telnet server: Including ping, trace route, telnet client

Maintenance and Management

Support Boot Monitor
Can upgrade firmware through boot monitor
Can upgrade firmware and configuration file through HTTP, FTP, TFTP
Can config through Web, keypad, Telnet
Support Syslog