Specifications

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Cisco IGX 8400 Series Provisioning Guide, Release 9.3.3 and Later Releases
OL-1166-04
Chapter 2 Cisco IGX 8400 Series Cards
Low-Speed Data Module
Figure 2-39 LDM Connections and Indicators
Table 2-49 LDM Front Card Connections and LEDs
Faceplate Item Function
Port number display
window
Indicated which port (1–8) on the back card is currently being monitored.
Scroll push-button When pressed, this button toggles through the ports on the back card.
Information displayed by other LEDs on the faceplate applies to the port
shown in the port number display window.
Loopback push-button When pressed, this button toggles through the three loopback states for the
port shown in the port number display window. These states are no loopback,
local loopback, and remote loopback.
Port under test LED
(yellow)
A port has gone into the loopback mode. If this is not the current port, use
the scroll push-button to toggle to the port being tested.
LL LED (yellow) A local loopback is occurring at the port being monitored.
RL LED (yellow) A remote loopback is occurring at the port being monitored.
DTR LED (green) The data terminal ready (DTR) signal is on at the port being monitored.
TXD LED (green) The transmit data (TXD) signal is on at the port being monitored.
DCD LED (green) The data carrier detect (DCD) signal is on at the port being monitored.
RXD LED (green) The receive data (RXD) signal is on at the port being monitored.
SCROLL
LOOP
PORT
UNDER
TEST
LL
RL
DTR
TXD
DCD
RXD
FAIL
ACTIVE
LDM
Scroll
Loop
Port under test
LL
RL
DTR
TXD
DCD
RXD
Fail
Active
Port no. display
H8331