1)A signaling gateway converters E1 to E1 with different signaling; 2)converter any signaling among SS7, PRI, Q.SIG, V5.2, R2. ... signaling inter-work issues between various switches and equipment through E1(T1), with its embedded ARM9 CPU and Linux operation system ... -AD300D is a cost effective, powerful, reliable and stable signaling converter.Specification:·Signaling support: SS7, PRI, Q.SIG, R2, V5. ...