Cisco CISCO1841 - 1841 Integrated Services Router Hardware Installation Manual page 67

Chapter 6 Troubleshooting
Table 6-2 Port and Connection Indicators on Cisco 1800 Series Fixed-Configuration Routers
LED Indicator State
FEx Off
Solid or blinking
green
1
CD (on Cisco 1801, Off
Cisco 1802, and
Cisco 1803 routers)
Green
1
CD (on Cisco 1811 Off
routers)
Green
2
LPBK Off
Green
3
LINK Off
Green
3
B1 Blinking green
3
B2 Blinking green
OL-6425-03
Meaning
The Ethernet interface next
to the LED is not receiving
packets.
The Ethernet interface next
to the LED is receiving
packets.
No DSL connection is
established.
DSL connection is
established.
No analog modem
connection is established.
Analog modem connection is
established.
DSL interface is operating in
normal mode.
DSL interface is in loopback
mode.
No ISDN BRI S/T
connection is established.
An ISDN BRI S/T D channel
connection is established.
Activity on the first B
channel.
Activity on the second B
channel.
Cisco 1800 Series Integrated Services Routers (Fixed) Hardware Installation Guide
Reading Port and Connection LEDs
Corrective Action
Ethernet is not active or is not connected. Check
Ethernet connections and make corrections as
necessary.
Router is not configured properly. Check
configuration and make corrections as necessary.
Normal indication. No action is required.
Normal indication unless a DSL connection is
required.
If a DSL connection is expected, check DSL
connections and make corrections as necessary.
Router is not configured properly. Check
configuration and make corrections as necessary.
Normal indication. No action is required.
Normal indication unless a modem connection is
required.
If a modem connection is expected, check modem
connections and make corrections as necessary.
Router is not configured properly. Check
configuration and make corrections as necessary.
Normal indication. No action is required.
Normal indication. No action is required.
—
Normal indication unless an ISDN BRI connection
is required.
If an ISDN BRI connection is expected, check
ISDN BRI S/T connections and make corrections
as necessary.
Router is not configured properly. Check
configuration and make corrections as necessary.
Normal indication. No action is required.
Indication is for information only.
Indication is for information only.
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