Cisco Systems MWR 1900 Manual De Usuario
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.
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.
interface card is communicating with another DSU/CSU. This LED is on
during normal operation.
Off
No carrier has been detected.