... , providing signaling transform between SS7, ISDN PRI, V5.2 signaling and SIP Protocol, as well as media transfer ... ISDN-PRI (ITU-T Q.931, Q.921);-V5.2 (ITU-T G.964, G.965)-CAS ·VoIP protocol ... RFC2833( DTMF ) RFC3362(t.38) RFC 3261(SIP 2.0) RFC3204(MIME media types for ISUP and QSIG Objects ... :·A 1U equipment can have 2 independent VoIP modules;·Each Module contains:-1~4 E1;-128 G.711 Channels;-64 ...