Table 1-4 – Cisco 1751 User Manual
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1-7
Cisco 1751 Router Hardware Installation Guide
78-11258-04
Chapter 1
Cisco 1751 Router Overview
Front-Panel LEDs
Table 1-4
Front-Panel LEDs
LED
Color
Cards Supported
LED Meaning
PWR
Green
–
On when DC power is being supplied to the router.
OK
Green
–
On when the router has successfully booted up and
the software is functional. This LED blinks during
the power-on self-test (POST).
Refer to
in the
for information on how to use this LED for router
diagnostics.
ETH
ACT
Green
–
Blinks when there is network activity on the
Ethernet port.
COL
Yellow
–
Blinks when there are packet collisions on the local
Ethernet network.
SLOTØ
Ø
Green
ISDN
On when the first ISDN B channel is connected.
Serial and CSU/DSU
Blinks when data is being sent to or received from
the port. For the VIC-2BRI-ST-NT/TE, blinks when
data is being sent to or received from any of the B
channels.
2-port serial
VIC-2E&M
VIC-2FXO
VIC-2FXS
VIC-2BRI-ST-NT/TE
WIC1-ADSL