Main Applications:
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;

Other Special Feature:

FXO Bypass Line: A bypass FXO line is selected during a network failure or power outage;
Auto Dial: DTMF mode;
Dual Telephone Number: Each line can be configured with two number; a PSTN number and an extension number;
Support Color ring; SMS; call Forwarding, call Waiting, call Transfer; Hot line; Caller id on call waiting ,Special purpose calling codes, Speed dial ,Redials
FXO port support second dialing or hot line mode;
Off-hook Detection: Loop start

Hardware:

Equipped TI high performance DSP processor;
CPU: Motorola Power PC 8250;
Flash Memory: 16Mb;
System Memory: 128Mb;
Maximum User Line Length: 3000 Meters;
Input Voltage: 110-240 AC; 50-60Hz;Input current 1AMP max);
FXS/FXO port connector: Champ 50;
Dimension (H*W*D):4.4*44*44cm;1U in height; 19"chassis;

WSS120AG Serires:

WSS120-96S       with 96FXS ports

WSS120-72S        with 72FXS ports

WSS120-48S        with 48FXS ports

WSS120-96O       with 96FXO ports

WSS120-72O       with 72FXO ports

WSS120-48O       with 48FXO ports

WSS120-88S/8     with 88FXS ports and 8FXO ports

WSS120-48S/48    with 48FXS ports and 48FXO ports

WSS120-36S/36    with 36FXS ports and 36FXO ports

WSS120-24S/24     with 24FXS ports and 24FXO ports