CANOGA PERKINS 9161 Network Interface Device - Manual (Page 45)

Troubleshooting 9161 Ethernet Network Interface Device User’s Manual
Optical Power Loss
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This chapter covers identifying fault conditions and determining corrective action. The front panel
LEDs provide both normal and fault information. To aid troubleshooting, Tables 5-1and 5-2 list all
LED functions and indications.
4.1 Optical Power Loss
Whenever there is a significant signal loss, the Rx indictor turns off. Check cable integrity, and
remove and inspect the cable connectors, being careful not to damage the fiber end-face surface
or the connector housing. Clean all optical connectors before reinstalling them.
4.2 Fault Conditions
The 9161 front panel and interface module LEDs show fault conditions. Additional information
about fault conditions appears on the System Alarms Log. Use the System Alarms Screen to
view alarms and faults on the 9161 (reference Chapter 3).
4.2.1 Remote Fault (RMTF)
If an optical port loses the RX optical signal, it sends a Remote Fault (RMTF) signal on its Trans-
mit to the distant end on the optical link. The SPD LED is off, and an alarm flags the link loss on
the optical port. When an optical port receives a Remote Fault signal, the Rx LED lights red and
an alarm flags the remote side optical link failure. Both local and remote link partners must be
configured to the same RMTF enable/disable setting (See Figure 5-1).
Figure 4-1. Remote Fault Signal
x
Tx
Rx
Rx
Tx
10G1
PORT 10G2
PORT
Local device Rx detects link loss
Tx transmits RMTF to remote device
Local device Rx turns OFF
Remote device Rx LED turns red
Tx
Rx
Rx
Tx
10G2
PORT
10G1
PORT
LOCAL DEVICE REMOTE DEVICE
Chapter 4
Troubleshooting