3g 4 Port Gsm-voip Gateway

3g 4 Port Gsm-voip Gateway Gateway With 8 Voip Channels 4 3g Sims 2 Fxo And 2 Gxs Ports Fits Into Existing Data Infrastructure And Allows Lowcost Long Distance Calling Through Sip Trunking Multiple Sip Proxy Registrations Restrict Unwanted Calls With List Of Denied Numbers Direct Number Dialing On Cellular Networks With Automatic Number Translation Caller Id Presentation/restriction Fax Over Ip (t.38 And Pstn Passthrough) Emergency Number Dialing Snmp Monitoring Port Forwarding And Dmz Webbased Configuration And Management Up To 9 Sip Accounts Voice Codecs: (a/e Law) G.723.1 G.729ab Gsmfr And Ilbc Brand: Matrix Comsec