Cisco Systems MWR 1900 Manuel d'installation Page 43

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A-5
Cisco MWR 1900 Mobile Wireless Edge Router Hardware Installation Guide
78-13982-02
Appendix A Troubleshooting
Reading the LEDs
Table A-3 VWIC LEDs
Note In a redundant configuration, when the relays of the VWIC open, the Carrier Detect LED
on the T1 ports will remain lit and the Alarm LED will also come on. Therefore, the
inactive router will show both the Carrier Detect light and the Alarm light, while the active
router will show only the Carrier Detect light.
LED Color Description
Loopback Amber A loopback or line state is detected or is manually set by the user.
Off Normal operation.
Alarm Amber A local or remote alarm state.
Off Normal operation.
Carrier Detect Green A carrier has been detected and the internal DSU/CSU in the WAN
interface card is communicating with another DSU/CSU. This LED is on
during normal operation.
Off No carrier has been detected.
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