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The Cisco 1721, 1760, 2621XM, 2651XM, 2691, 3725, 3745, and 7206 VXR NPE-400 Routers
for remote system access or dial backup using a modem. The 10/100Base-T LAN port has Link/Activity,
10/100Mbps, and half/full duplex LEDs.
Cisco 1721 with descriptions detailed in
Figure 4
Table 1
Cisco 1721 Rear Panel LEDs and Descriptions
LED
WIC 0 OK Green
WIC 1 OK Green
FDX
100 Mbps
LINK
MOD OK
Figure 5
operation. The front panel of the 1721 displays whether or not the router is booted, overall activity/link
status, and collision information. The front panel of the 1760 displays whether or not the router is
booted, overall activity/link status, collision information, and specific information for each installed
interface.
Cisco 1721, 1760, 2621XM, 2651XM, 2691, 3725, and 3745 Modular Access Routers and 7206-VXR NPE-400 Router FIPS 140-2 Non-Proprietary
6
Cisco 1721 Rear Panel LEDs
DSU
56K
SEE MANUAL BEFORE INSTALLATION
Model
WIC 0 OK
FDX
100
LINK
Cisco 1721
WIC 0
FDX/100/
OK LED
LINK LEDs
Indication
Description
A WIC is correctly inserted in the card slot
Off
No WIC present / WIC incorrectly inserted in the card slot
A WIC is correctly inserted in the card slot
Off
No WIC present / WIC incorrectly inserted in the card slot
Green
The interface is transmitting data in full-duplex mode
Off
When off, the interface is transmitting data in half-duplex mode
Green
The speed of the interface is 100 Mbps
Off
The speed of the interface is 10 Mbps or no link is established
Green
An Ethernet link has been established
Off
No Ethernet link established
Green
VPN hardware encryption module is installed and recognized by Cisco IOS
Off
VPN hardware encryption module not installed / not recognized by
Cisco IOS
shows the front panel LEDs of the 1721 and 1760, which provide overall status of the router's
Figure 4
shows the LEDs located on the rear panel of the
Table
1:
CONSOLE
10/100 ETHERNET
AUX
MOD OK
MOD OK
WIC 1 OK
+5, +12, -12 VDC
WIC 1 OK
LED
LED
OL-6083-01