... and IP network; 2)Providing transform between SS7, ISDN PRI V5.2 signaling and SIP protocol; Advantage ... and IP network, providing signaling transform between SS7, ISDN PRI, V5.2 signaling and SIP Protocol, ... Mapping) RFC3261(sip) RFC5806(Diversion Indication in SIP) RFC2833( DTMF ) RFC3362(t.38) RFC 3261(SIP 2 ... its application:Back picture of this model: ISDN PRI to SIP Converter/gateway NC-MG900 with ...