1)Signalling gateway, converter any signaling between SS7, ISDN PRI, Q.SIG, V5.2. R2; 2)Clocking source: E1, ... , FSK inspection and delivery; Function:·Convert any signalling between SS7, ISDN PRI, Q.SIG, V5.2, R2;·Multi router, inter-office ... % Application as follow shows:Figure 1 Signaling Convert Between SS7, ISDN PRI, V5.2, R2, Q.931; Figure 2 Multi-Router ...