IBM 8239 Token-Ring Stackable Hub, Setup And User Manual

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the port will still be administratively disabled. Once a port has been administratively
disabled, issue the ENABLE PORT command to allow insertion of the port again.
RI/RO Status
One green and one yellow LED are associated with each port.
Figure 5-4. RI/RO LEDs
Note: These status descriptions are valid only when:
¹
The power indicator LED is on
¹
The box status green LED is on
¹
Box status yellow LED is not on
Note: When the 8239 is reset, all of the RI/RO LEDs are on during the DRAM
test. In addition, the box status green LED is off and the yellow LED is on.
RI/RO Status Green LED
Table 5-6. RI/RO Status (Green LED)
State Meaning
On RI/RO is inserted
Off RI/RO is not inserted
Cause Action
Cabling problem Make sure all cable connections are secure.
Go to “RI/RO Module” on page 3-2; check the
cabling.
Check the cabling for breaks or other damage.
Replace suspect cables with known good
cables. If you are using the Optical Fiber RI/RO
Module, note that bending the fiber beyond the
minimum bend radius can break the internal
fiber while the cable jacket remains
undamaged.
Make sure the cable length and specifications
comply with the requirements in “Cable Types
and Distances” on page 1-4.
Remote device not powered on Power on the remote device.
Blinking RI/RO is administratively disabled
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8239 Setup and User’s Guide