CISCO SYSTEMS MODEL 850/851/857 4 PORT 10/100MBPS ETHERNET LAN WAN ROUTER | eBay
Cisco 850 Series and Cisco 870 Series Access Routers Hardware Installation Guide - Router Cabling Procedures [Cisco 800 Series Routers] - Cisco Systems
Cisco 850 Series and Cisco 870 Series Access Routers Hardware Installation Guide - Product Overview [Cisco 800 Series Routers] - Cisco Systems
Refurbished CISCO 857 Router
Cisco 850 Series and Cisco 870 Series Access Routers Hardware Installation Guide - Router Cabling Procedures [Cisco 800 Series Routers] - Cisco Systems