... solves any signalling inter-work issues between various switches and equipment through E1(T1), with its Imbedded AM9 CPU and Linux ... cost effective, powerful, reliable and stable signalling converter. Specialty: * Signaling support: ITUT C7, SS7, ISDN PRI, ETSI ISDN, Q.SIG, R2 ... follow shows: Signaling Gateway /E1 Signaling Converter NC-AD300D which support the conversion among SS7, ISDN PRI, R2, V5.2