IBM 8239 Token-Ring Stackable Hub, Руководство по установке и эксплуатации

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Port Status Green LED
Table 5-4. Port Status (Green LED)
State Meaning
On Port is inserted and operational. Exception: if both the green and yellow box status LEDs are
on, the port has failed diagnostics.
Off Port is not inserted
If the yellow port LED is on, go to “Port Status Yellow LED,” yellow LED on.
Cause Action
No station is connected If required, connect station.
The connected station is powered off or the workstation is not operating
Make sure the station is powered on and the
workstation is operating correctly.
Cabling problem Make sure that all cable connections are
secure. Check the cable for breaks or other
damage. Replace suspect cables with cables
that are known to be good. Make sure the
cable length and specifications comply with
the requirements in “Cable Types and
Distances” on page 1-4.
Station speed mismatch Make sure that the ring speed of the
connected station matches the hub ring
speed.
Blinking Port is administratively disabled
Cause Action
User disabled the port If required, use ENABLE PORT to enable the
port. See
Command Reference for information
about this command.
Port Status Yellow LED
5-4
8239 Setup and User’s Guide