4-2
Cisco 10000 Series Router Troubleshooting Guide
OL-0439-02
Chapter 4 Troubleshooting Line Cards
Troubleshooting the OC-12 Packet-Over-SONET Line Card
Figure 4-1 OC-12 POS line card LEDs
29993
LED Status Description
Fail
Rx (receive)
Tx (transmit)
Carrier
Yellow
Off
Green
A major failure has disabled the
line card.
The line card is operating
properly.
Receiving traffic.
Carrier detected.
Carrier not detected.
Off
Off
Off
Yellow
Not receiving traffic.
Green Transmitting traffic.
Not transmitting traffic.
Green
CISCO
10000
C
A
R
R
IE
R
T
X
R
X
FAIL
OC–12/STM–4 POS SM–IR
0
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