Installation guide

Chapter 4: Troubleshooting, Switches, and LED Indications
4-6 SSR-600 Installation Guide
4.3 TROUBLESHOOTING SSR-600 HARDWARE
Power (PWR) LED is OFF
• Check the power source.
• Check that the power connections are firmly plugged in to the back
panel of the SSR-600.
Processor (CPU) LED is OFF
The CPU stays OFF for an extended amount of time, and the power
(PWR) light remains on. The CPU is in an unknown state.
• Contact Cabletron Systems (refer to Getting Help in the
Introduction).
Processor (CPU) LED is blinking Red
The processor has detected a fault condition, or has failed boot up
diagnostics.
• Contact Cabletron Systems (refer to Getting Help in the
Introduction).
4.4 TROUBLESHOOTING THE LAN
Transmit LED is flashing Red
Collisions are normal in an Ethernet network, however, increased
collisions may indicate that the network is out of specification.
Receive (RCV) LED is OFF
• Check that the SSR-600 and the device at the other end of the
segment are powered up.
• Check that the port is enabled. Refer to the appropriate Cabletron
Systems software manual to enable the port.
• Verify that the RJ45 connectors on the twisted pair segment have
the correct pinouts.
• Check the cable for continuity.
• Check that the cable meets the specifications for dB loss.