Cisco 877W Hardware Installation Guide - Page 19

Chapter 1 Product Overview General Descriptions of the Router Models Router Ports on the Cisco 857 and Cisco 877 Back Panel The Cisco 857 and Cisco 877 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 ADSL-over-POTS port • One RJ-45 console port Cisco 876 ADSL-over-ISDN Router The Cisco 876 router is an asymmetric digital subscriber line (ADSL)-over-ISDN routing device. The router has an integrated 4-port Ethernet switch for the LAN and an ADSL physical interface for the WAN, and ISDN BRI WAN connectivity. This ISDN BRI interface can be used for normal WAN connections or can be configured as a backup connection for the ADSL WAN interface. These features allow the routers to connect a corporate telecommuter or a small office to a central office or an Internet service provider (ISP) over an ADSL interface. Figure 1-7 shows the front panel of the Cisco 876 router, and Figure 1-8 shows the back panel. Figure 1-7 Cisco 876 Router Front Panel OK CD - RXD - TXD LNK - B1 - B2 PPP VPN OK - DATA ADSL ISDN WLAN ETHERNET LAN 0123 CISCO 800 SERIES 122349 Figure 1-8 Cisco 876 Router Back Panel, with Antennas Installed 122243 LEFT Cisco 876W SN: XXXNNNNXXXX LAN FE0 FE1 FE2 FE3 ISDN S/T ADSL o ISDN RESET CONSOLE AUX +5,+12 VDC RIGHT / PRIMARY OL-5331-01 Cisco 850 Series and Cisco 870 Series Access Routers Hardware Installation Guide 1-5