Voip Sip Gateway With 16fxs Ports, 16 Simultaneous Calls

Following are the Main Applications of our VoIP SIP Gateway With 16FXS Ports, 16 Simultaneous Calls:
Remote SIP access gateway for IP-PBX,example asterisk based on IPPBX.
IP based wide area PBX for enterprise, government branches and schools
VoIP Long Distance application for IP phone supermarkets and enterprises
Carrier primary and secondary line service
Small and home offices, Hotel, Call center

48,72,96 FXO ports for calling card, call termination...

Signaling
VoIP Protocol: SIP V2(RFC3261);MGCP(RFC2705),TISPAN(IMS specialty)
OffHook Detection: FXS Loop Start, DDI (Hong Kong)
DTMF: SIP INFO;RFC2833 DTMF Relay; In-Band;

Key Features:
Codec: G.711Alaw; G.711 ulaw; G.729A;G.723.1;GSM; iLBC;
Echo cancellation: G.168; Tail Length 8/16/32 milliseconds;
Dynamic Jitter Buffer; Voice Activity Detector (VAD); and Comfort Noise Generator(CNG);
Calling Control: Called/Calling Number Mapping; Line Hunting;
FAX Processing: T.38 FAX Relay, T.30;
Billing: RADIUS Interface; Polarity Reverse
Configuration: Web Based User Interface, Unified Network Management;