HP J2415A Installation And Reference Manual page 72

Hub Reference
Hub Operation
Front of the Hub
Hub Status and Port LEDs
The hub status and LAN port LEDs indicate whether or not the hub is
functioning properly.
LED State
Power (green)
Fault (orange)
Flashing
Slowly*
Console (green)
Exp Slot (green)
Flashing
Slowly*
Uplink A,
Uplink B (green)
Flashing
Slowly*
Flashing
Every 10
seconds*
4-2
On The hub is receiving power.
Off The hub is not receiving power.
Off Self tests have not detected any faults on the hub.
On The hub or Expansion Slot module has failed its self-test after the hub has been
powered on or reset.
If the bridge module is installed, this LED indicates a problem with the 10Base-T
connection or part of the module itself. Otherwise, this LED should only occur in
tandem with the RPS LED indicating an RPS failure.
Off The hub is not being accessed by HP Stack Manager or if an SNMP module is
installed, the ASCII console.
On This hub is currently being accessed by HP Stack Manager or the ASCII console.
On An optional module is properly installed in the hub's back panel slot.
Off An optional module is not installed.
The module is performing its self-test (after hub power on or a reset). If the rate
of flashing increases and the flashing continues for more than approximately 30
seconds, refer to chapter 3, "Troubleshooting".
Off The Uplink port is disabled.
On The Uplink port is connected and has successfully trained with an upper-level
hub.
There is a problem with the cable or the permissions on the upper-level hub.
The backup link of the primary link will flash every 10 seconds to indicate an end
node is detected on the other end and that the cable is working.
Continued on the next page
Meaning