1)A signaling gateway converters E1 to E1 with different signaling; 2)converter any signaling among SS7, PRI, ... signaling inter-work issues between various switches and equipment through E1(T1), with its embedded ARM9 CPU and Linux operation system ... : SS7, PRI, Q.SIG, R2, V5.2;·Interface Connector: 16 E1(T1), 1 10/100M network, 1 RS232 console;·Link: 16 ...