The NetVanta 4305 is an access router designed for cost-effective Internet access, corporate Frame Relay, point-to-point connectivity, and Virtual Private Networking (VPN) for large-bandwidth applications supporting up to eight T1s. Residing in a 1U high, 19" rackmountable metal enclosure, the NetVanta 4305 is a single platform that offers one Wide Module slot, two Network Interface Module (NIM) slots and dual 10/100Base-T Ethernet LAN ports for true LAN segmentation or DMZ applications. The single Wide Module slot within the NetVanta 4305 will house the Octal T1 Wide Module, while the NIM slots will support a variety of the NetVanta NIMs and DIMs: 56/64K, T1/FT1, T1/FT1 with DSX-1, Dual T1, E1/FE1, E1/FE1 with G.703, and Serial interfaces. For dial-backup an Analog Modem or ISDN BRI DIM are available for preventing downtime by dialing around a failed circuit to any PPP compliant device. The versatile hardware platform of the NetVanta 4305 is further complemented with the ADTRAN Operating System (OS). The ADTRAN OS allows for the support of static and default routes, and allows for fast, accurate network convergence using routing protocols such as OSPF and RIP. In addition, the ADTRAN OS terminates Frame Relay, PPP, PPPoE, and Multilink PPP WAN protocols.