Cisco CISCO1841 - 1841 Integrated Services Router User Manual

1-11
Cisco 1800 Series Integrated Services Routers (Fixed) Hardware Installation Guide
OL-6425-03
Chapter 1 Overview
Interface Numbering
Figure 1-11 Front Panel of Cisco 1812 Router
Figure 1-12 Back Panel of Cisco 1812 Router
Interface Numbering
The WAN and LAN interfaces on a Cisco 1800 series fixed-configuration router are numbered as
follows:
• On the Cisco 1811 and Cisco 1812 routers, the Fast Ethernet 10/100 WAN ports are numbered FE
0 and FE
1; the lower of the two ports is FE 0.
• On the Cisco 1801, Cisco 1802, and Cisco 1803 routers, the Fast Ethernet 10/100 WAN port is
numbered FE 0.
• On the Cisco 1811 and Cisco 1812 routers, the Fast Ethernet LAN switch ports are numbered FE 2
through FE 9. The FE 2 port is the lower port, farthest on the right (as viewed from the rear of the
router), and switch ports are numbered incrementally, FE 2 through FE 5, to the left along the
bottom row, and then incrementally, FE
6 through FE 9, to the left along the top row.
1 CompactFlash Slot
SYS OK
POE
S 4
FEX
3
2
FE0
LINK
B1
ISDN
B2 CF
9
8 7
SWITCH
6
FE1
PPP VPN
Cisco 1800 Series
127167
1
1 ISDN BRI S/T port 6 POE connector
1
1. Inline power is a field-upgradable option only. It is not installed by default.
2 USB 2.0 ports 7 Power switch
3 Managed 8-port FE switch 8 Power connector
4
FE WAN ports
9
RP-TNC antenna connectors (wireless models
only)
5 Console and AUX ports
127161
1
2
3
4
5
6
7
8
9
9

Cisco CISCO1841 - 1841 Integrated Services Router Specifications

General

Brand	Cisco
Model	CISCO1841 - 1841 Integrated Services Router
Category	Network Router
Language	English