... in traditional telephony technology and VoIP for NGN,not only provide E1,FXO,FXS interface, but also provide VoIP interface to IP network. ... -PRI* SIP Protocol * CodecsG.711-pcma, G.711-pcmu, G.723, G.729, G.726-16, G.726-24, G.726-24, G.726-32, G.726-40 ... PSTN and IP network. * Multi routerinter-office management, Intelligent router distribute and telephone traffic sharing * CDR output support TCP or ...