1)A single module with 2 E1; 2)Support SIP, H323, SS7, PRI; 3)Locates on the interface ... of them. It contains single module with 2E1, support SIP, H323, SS7, PRI and so on. The dimension ... providing between SS7(ISDN PRI, CAS, V5.2 ) and SIP protocol transform. as well as media transfers between the PSTN ... (ITU-T G.964, G.965)·VoIP protocol support: -SIP(RFC3261, RFC3362(T.38), RFC2833(DTMF)); -Code: G. ...