Troubleshooting Subsystems - Cisco uBR924 Installation Manual

Troubleshooting Subsystems

6.
Troubleshooting Subsystems
The key to troubleshooting is to isolate a problem to a specific subsystem:
•
•
•
•
•
Figure 4-2 on the next page provides a general troubleshooting flowchart. Table 4-2 and Table 4-3 help
you correlate LED behavior with possible problems, and suggested courses of actions.
Cisco uBR924 Router Hardware Installation Guide
4-4
The voice port LEDs (V1 and V2) on the cable access router light when a subscriber establishes a
VoIP connection. If you do not have dial tone on the Cisco uBR924 voice ports and cannot establish
a VoIP connection, proceed to the troubleshooting "VoIP Subsystem" section on page 4-11.
Power subsystem
Coaxial cable subsystem
RF and digital signal subsystem
PC subsystem
VoIP subsystem
Chapter 4 Troubleshooting
OL-0338-01 (3/2000)