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6-4
C
HAPTER
6: T
ROUBLESHOOTING
Troubleshooting ATM
OC-3 Card LEDs
This section explains how to read the ATM OC-3 card LEDs and
determine appropriate corrective action
The LEDs on the base module and ATM OC-3 cards function
independent of each other.
Table 6-3 identifies possible causes and corrective actions for each LED
state.
Table 6-3
ATM OC-3 Card LED Corrective Actions
LED LED State Possible Cause Corrective Action
TX Green ATM signal detected. None required.
Yellow Transmitting ATM cells. None required.
Off Problem with ATM switch
connection (such as cable not
connected to ATM OC-3 card).
Check ATM switch connection and
interface.
ATM OC-3 card failed. If alternate ATM OC-3 card is installed,
check that switchover to alternate ATM
OC-3 card occurred.
RX Green ATM signal detected. None required.
Yellow Receiving ATM cells. None required.
Off Problem with ATM switch
connection (such as cable not
connected to ATM OC-3 card).
Check ATM switch connection and
interface.
ATM OC-3 card failed. If alternate ATM OC-3 card is installed,
check that switchover to alternate ATM
OC-3 card occurred.
ACTIVE Green Identifies active ATM OC-3
card.
None required.
Off ATM OC-3 card inactive. If alternate ATM OC-3 card is installed,
check that an alternate ATM OC-3 card
is active.
ATM OC-3 card failed. If alternate ATM OC-3 card is installed,
check that switchover to alternate ATM
OC-3 card occurred.
ALARM Green ATM OC-3 card failed. If alternate ATM OC-3 card is installed,
check that a switchover to alternate
ATM OC-3 card occurred.
Refer to “Recovering from Problems” on
page 6-5.
Off Normal operating condition. None required.