1-3
Cisco 2900 Series and 3900 Series Hardware Installation Guide
OL-18712-02
Chapter 1 Overview of the Routers
Chassis Views
Figure 1-2
Back Panel Slots and Connectors of the Cisco 2901 Router
3.
POE = power over Ethernet.
4.
LED goes off if the AC power fails or is disconnected. It does not go on and off with the power switch.
1
EHWIC slots
1
0, 1, 2, and 3 (0, Far right)
1.
DW-EHWICs can fit into slot 0 and 1, and into slot 2 and 3. EHWIC slots support HWIC, VIC, and WIC.
2
USB
2
serial port
2.
USB = Universal serial bus
3
Aux port
4
RJ-45 serial console port
5
10/100/1000 Ethernet ports (GE0/1)
6
10/100/1000 Ethernet port (GE0/0)
7
Ground
8
USB0 and USB1 (1, Top)
9
CompactFlash
3
0 and 1
3.
Only Advanced Capability CompactFlash (CF) purchased from Cisco operates in Cisco 2900 series and Cisco 3900 series
ISRs. Legacy CF can impact and severely degrade performance in these routers. See the
“Memory” section on page 1-22
.
When legacy CF is inserted, the following error message appears:
WARNING: Unsupported compact flash detected. Use of this card during normal operation
can impact and severely degrade performance of the system. Please use supported
compact flash cards only.
ISM
PVDM1
PVDM0
EN
EN
S
L
USB
1
0
CONSOLE
AUX
G
E
0
/
0
DO NOT REMOVE DURING
NETWORKING OPERATION
DO NOT REMOVE DURING
NETWORKING OPERATION
2901
S
L
GE 0/1
250958
3
6
2
7
1
8
9
9
4
EHWIC 3
EHWIC 2
EHWIC 1
EHWIC 0
CF 1
CF 0
5