... source: E1, internal; Description: NC-AD300D is designed and manufactured by NiceComm according to National Telecom Standard, solves any signalling inter-work ... PRI, ETSI ISDN, Q.SIG, R2, V5.2 * Interface Connector: 16 E1 (8 spans), 10/100M network 1 port, RS232 console ... 1 port * 16 SS7 links, 16 PRI * Switching Volume: 2048 x 2048 * Clocking accuracystratum 3 ...