Product UPC: 746320719542 The Cisco E1/T1 ISDN PRI Network Module's integrated channel service unit (CSU) provides direct connection to the Telecommunications network, thus allowing customers to consolidate customer premises equipment (CPE). This provides multifunction dial access aggregation, routing functionality, VPN and firewall security, and other capabilities right inside the router in power branch office environments. The 2-port version offer support for balanced and unbalanced E1 connectivity and conform easily to customers...