Key Features. 2x 1000BASE-T ports/1x USB (Universal Serial Bus) 2.0/2x SFP2 expansion NIM slots Rackmountable The Cisco 4000 family Integrated Services Router (ISR) revolutionizes WAN communications in the enterprise branch. With new levels of built-in intelligent network capabilities & convergenceit specifically addresses the growing need for application-aware networking in distributed enterprise sites. These locations tend to have lean IT resources. But they often also have a growing need for direct communication with both private data centers & public clouds across diverse linksincluding Multiprotocol Label Switching (MPLS) VPNs & the Internet..