... between SS7, ISDN PRI V5.2 signaling and SIP protocol; Advantage:1. Modular design (Two modules, Each module ... SS7, ISDN PRI, V5.2 signaling and SIP Protocol, as well as media transfer between the PSTN ... and IP network.Signalings, Protocol and Codec that support by NC-MG900:·Signaling ... and QSIG Objects) RFC3578(Mapping of ISUP overlap to SIP))-Codec:G.711 U-Law and A-Law ...