Cisco 870 Series User Manual

1-5
Cisco 850 Series and Cisco 870 Series Access Routers Hardware Installation Guide
OL-5331-01
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
Figure 1-8 Cisco 876 Router Back Panel, with Antennas Installed
OK CD PPP VPN OK DATA
WLAN
RXD
ADSL
B1
ISDN
TXD
CISCO 800 SERIES
ETHERNET LAN
0123
122349
LNK ––––– B2
LEFT
RIGHT / PRIMARY
AUX
ADSL o ISDN
LAN
FE0
FE1
FE2
FE3
Cisco 876W
CONSOLE
RESET
+5,+12 VDC
ISDN S/T
122243
SN: XXXNNNNXXXX

Cisco 870 Series Specifications

General

Brand	Cisco
Model	870 Series
Category	Network Router
Language	English