Cisco 877W Hardware Installation Guide - Page 17

Chapter 1 Product Overview General Descriptions of the Router Models Router Ports on the Cisco 851 and Cisco 871 Back Panel The Cisco 851 and Cisco 871 routers have the following ports on the back panel: • Four 10/100BASE-T RJ-45 Fast Ethernet LAN ports with a built-in switch • One 10/100BASE-T RJ-45 WAN Fast Ethernet port • One RJ-45 console port • Two USB ports (on the Cisco 871 router only) USB Port Power Allocation on the Cisco 871 Router The power available for each of the two USB ports is 500 mA. Power is dynamically allocated to each port as needed, up to 500 mA. Cisco 857 and Cisco 877 ADSL-over-POTS Routers The Cisco 857 and Cisco 877 routers are asymmetric digital subscriber line (ADSL)-over-plain old telephone service (POTS) routing devices. The routers have an integrated 4-port Ethernet switch for the LAN and an ADSL physical interface for the WAN, allowing the routers to connect a corporate telecommuter or small office to corporate LANs and the Internet. The front panels of the Cisco 857 and Cisco 877 routers are identical. (See Figure 1-4.) The back panels of these two routers are similar except for their model numbers, which differ. Figure 1-5 shows the back panel of a Cisco 857 router, and Figure 1-6 shows the back panel of a Cisco 877 router. Figure 1-4 Cisco 857 and Cisco 877 Router Front Panel OK CD RXD TXD ADSL PPP VPN OK DATA WLAN ETHERNET LAN 0123 CISCO 800 SERIES 122348 OL-5331-01 Cisco 850 Series and Cisco 870 Series Access Routers Hardware Installation Guide 1-3