VoiceFeatures „  Support IAX2 and SIP RFC3261 synchronously „  Codec: G.711A/u,G.7231high/low,G.729 „  Echo cancellation: Support G.168,and Hands-free can support96ms „  SupportVoice GainSetting,JitterBuffer,VAD, CNG, dualGK,call forward,and Peer to Peer „  NAT transverse: support STUN client, Citron,AVS „  SIP supportSIP domain, SIP authentication (none, basic,MD5), DNSname of server,Peerto Peer „  SIPsupportPubic&Privateserver.CanconnecttoISP and Private SIP server at the same time „  SIP supportdualpublic server „  DTMF: Support SIP info, DTMF Relay,RFC2833 „  SIP application: supportCall forward/transfer/holding/waiting „  Callcontrolfeatures: Flexible dial map, support Hotline,EmptycallingNo.Rejectservice,Blacklistfor reject authenticated call,No disturb, Caller ID. „  Support conference calland voice record „  English, Spanish, Czechoslovakalternative     NetworkFeatures „  WAN/LAN:SupportBridgeandRoutermodel „  SupportbasicNATandNAPT „  SupportPPPoEforxDSL „  SupportDHCPClientonWAN „  SupportDHCPServeronLAN „  SupportDNSRelay,SNTPClient,Firewall „  Networktoolsintelnetserver:Includingping,raceroute, telnetclient     MaintenanceandManagement „  SupportBootMonitor „  Canupgradefirmwarethroughbootmonitor „  CanconfigthroughWeb,keypad,Telnet „  CanupgradefirmwareandconfigurationfilethroughHTTP, FTP,TFTP „  SupportSyslog "   Network Protocol
SIP v1 ( RFC2543),v2 ( RFC3261 ).
IP/TCP/UDP/RTP/RTCP .
IP/ICMP/ARP/RARP/SNTP.
TFTP Client/DHCP Client/PPPoE Client .
Telnet/HTTP Server .
DNS Client

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 .
Voice Quality
VAD : Voice activity detection .
CNG: Comfortable noise generator .
LEC: Line echo canceller .
Packet Loss Compensation .
Adaptive Jitter Buffer .
Call Function

Call Hold
Call Waiting
Call Forward
Caller ID
3-way conference .
DTMF Function
In-Band DTMF
Out-of Band DTMF .
SIP Info .