VoIP Gateway - VoIP S804 Gateway

Technical specification:
Both support H.323 and SIP protocols: H.323 Gatekeeper Registration, SIP Registration and Digest Authentication.
Stackable VoIP Architecture: Stackable SIP calls with multiple VoIP Gateways.
Caller ID Delivery and Detection: FXS support DTMF&FSK Caller ID generation; FXO supports DTMF&FSK Caller ID detection. (Optional)
Smart VoIP call Dialing Book: VoIP call Book could provide any application VoIP call to any type destination (Domain name/IP address, PSTN or PBX) or hunting number setting.
AC termination Impedance : 600/900 OHM and complex impedance
Polarity Reversal Detection: Type I and Type II
NAT traversal: This feature allow gateway to operate behind any NAT/Firewall device. There is no need to change any configuration of NAT/Firewall like setting virtual server.
Smart-QoS Guaranteed: This bandwidth management feature provide good voice quality when reserve bandwidth for voice traffic when VoIP call proceeds. user place VoIP call and access internet at the same time. The gateway will automatically start to
Voice channels status display: This function display each port status like as onhook, offhook, calling number callee's number, talk duration, codec type.
Pulse Dial support: Support pulse dialing generation and detection.(Optional)
Flash Detection and Generation Program: FXO support Flash Generation and FXS support Flash Detection.
Telephony Specifications:
Voice Codec: G.711(A-law /?-law), G.729 AB, G.723 (6.3 Kbps / 5.3Kbps)
FAX support : T.30 / T.38
Echo Cancellation: G168-2000
FXO Caller ID detection : DTMF and FSK
Answer supervision : Support Reverse Battery Detection and Voice Detection
Adjustable AC Termination Impedance : 600 / 900 OHM and complex Impedance
Life-Line support (IP/ power failure over relay)
Polarity Reversal : Type I and Type II
12K Hz and 16K Hz Metering

IP Specifications:
H.323 v2/v3/v4 and SIP (RFC 3261) , SDP (RFC 2327), Symmetric RTP, STUN (RFC3489), ENUM (RFC 2916), RTP Payload for DTMF Digits (RFC2833), Outbound Proxy Support.
LAN : Support Virtual Server, DHCP Server
WAN: PPPoE client, DHCP client, Fix IP Address, DDNS client
Network Address Translation: Providing build-in NAT router function
Smart QoS: Guarantee the voice bandwidth

Configuration & Management
Web-based Graphical User Interface
Remote managenet over the IP Network
FTP firmware upgrade
Backup and Restore Configuration file
LED Indicatiorst
Power , Reset, WAN, LAN,FXS/FXO

General Specification
AC power : AC100V-240V, DC12V/1.5A,50/60 Hz
Temperature: 0°C ~ 40°C (Operation)
Humidity: up to 90% non-condensing
Emission: FCC Part 15 Class B, CE Mark
Dimension : 260 x 130 x 35 mm
Weight: 900g (Aluminium )