12-4
Cisco Network Modules Hardware Installation Guide
OL-2485-20
Chapter 12 Connecting T1/E1 IMA Network Modules
T1/E1 IMA Network Module LEDs
T1/E1 IMA Network Module LEDs
All network modules have an enable (EN) LED. The enable LED indicates that the module has passed
its self-tests and is available to the router. T1/E1 IMA network modules have the additional LEDs shown
in
Figure 12-6
and described in
Table 12-1
.
Figure 12-6 T1/E1 IMA Network Module LEDs
Table 12-1 T1/E1 IMA Network Module LEDs
LED
Color
Meaning
AL
Yellow
Alarm indicating loss of signal, loss of frame, or unavailability because of
excessive errors.
LP
Yellow
Controller local loopback.
CD
Green
Carrier received on telco link.
ATM-T1
8T1-IMA
EN
17960
AL
LP
CD
AL
LP
CD
AL
T1-IMA 7
T1-IMA 6
T1-IMA 5
T1-IMA 4
T1-IMA 3
SEE MANUAL BEFORE
INSTALLATION
T1-IMA 2
T1-IMA 1
T1-IMA 0
LP
CD
AL
LP
CD
AL
LP
CD
AL
LP
CD
AL
LP
CD
AL
LP
CD
Status LEDs
Enable LED