Specifications

Operation
RADring
Installation & Operation Manual
4-4 Diagnostics and Troubleshooting 3/11/98 12:28
All of the Ring In/Ring Out Modules share a common set of LEDs which are
presented in Table 4-3 below.
Table 4-3 Ring In/Ring Out Module Indicators
LED Name Color Meaning
FLT Red Cable break detected automatic loopback performed
(switch dependent)
4* Green Module is selected to operate at 4 Mbps rate
16* Green Module is selected to operate at 16 Mbps rate
RI Green Module is configured as Ring In
RO Green Module is configured as Ring Out
* Not relevant to TIO module
FLT LED lights (cable break detection):
•
Check all cable connections
•
Check unit connected to other end for connections and power status.
CML/NM Module
The CML/NM Module has a FLT LED which indicates module faults.
FLT LED lights:
•
Check the module card's connections. Try the Reset button.
•
Check card's fuse. If faulty, replace.
•
Check power supply units. The CML/NM module requires a power
supply of 5.2 - 5.5 Vdc. Replace the power supply modules if they do not
meet this requirement.
Ethernet
Moddules
Ethernet modules consist of the following:
EP - 8T EPR - 8T
EP - 4T/AUI EPR - 4T/AUI
EP - 4T/FL EPR - 4T/FL
EP - 4FL
EP -1T/2W