SC-4 4 ports VoIP Gateway is a SIP + H.323 compliant residential gateway that provides solution for integrating voice-data network and PSTN. It is equipped with a 4 port Ethernet switch and built-in NAT router function that provides Internet access using only one IP address.

? VoIP Key Features

? 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.
? 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:
? Smart-QoS Guaranteed: This feature provide good voice quality when users place VoIP call and access Internet at the same time. The gateway will start reserve bandwidth for voice traffic automatically when VoIP call proceeds.
? Voice channels status display: This function display each port status like as onhook, offhook, calling number callee��s number, talk duration, codec.
? Pulse Dial support: Support pulse dialing generation and detection.(Optional)
? Flash Detection and Generation Program:
FXO support Flash Generation;
FXS support Flash Detection.

? Telephony Specification:

? 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: G.165/G168
? FXO Caller ID detection : DTMF and FSK
? Answer supervision :
? 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 Specfications:

? 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: NAT, Virtual Server, DHCP Server
? WAN: PPPoE client, DHCP client, Fix IP Address, DDNS client
? Network Address Translation: Providing build-in NAT router function.



? Call Features

? Voice channels status display
? Direct Dialing Mode: peer to peer call (support IP Address Call or Domain Name Call)
? Register Call Mode: register to H.323 Gatekeeper or SIP Proxy Server
? Adjustable volume: - 9 db ~ 9 db
? Silence Compression
? Auto Dial for speed
? Dynamic Jitter Buffer

? Configuration & Management

? Web-based Graphical User Interface
? Remote management over the IP Network
? FTP firmware upgrade
? Backup and Restore Configuration file

? 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 (Aluminum )