* Voice Functions and Features:
Protocol: SIP RFC3261, RFC 2543, IAX2
Codec: G. 711a / u, G. 7231 high / low, G. 729
Echo cancellation: Support G. 168
Powerful digital signal processing (DSP)
NAT transverse: support STUN client, Citron, AVS
Voice activity detection (VAD) and comfort noise generation (CNG)
Advanced adaptive jitter control and packet loss concealment
Support SIP info, DTMF Relay, RFC2833
* Calling Functions and Features:
Hands-free can support 96ms
Call forward / transfer / holding / waiting
Flexible dial map
Caller ID identification
Support Hotline
Empty calling No. Reject service
Black list for reject authenticated call
No disturb
Support conference and voice record
* Network Functions and Features:
WAN / LAN: Support Bridge and Router model
PPoE for xDSL, DHCP Client on WAN
SNTP Client, 802. 1p / q, Diffserv
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
