IBM 7012 300 Series Installation And Service Manual page 86

Twisted-Pair Ethernet Riser
Note: Follow correct shutdown and power procedure and remove the Ethernet riser from
The twisted-pair Ethernet riser comes with a single jumper panel marked LINK with the
words ON and OFF on either side. This jumper is used to make the twisted-pair Ethernet
riser compatible with IEEE 802.3 10 base T Ethernet networks. The twisted-pair riser is
shipped with the jumper set to the ON position.
If the network is not 10 base T, move the LINK jumper to the OFF position.
Twisted Pair Ethernet Card Jumper Position
OFF
Empty Pin
Jumper in "On" Position
The single green LED on the twisted-pair riser lights when the riser is properly connected to
a 10 base T network and the power to the system unit is on. If the green LED does not
come on, there could be several possible problems. The twisted-pair cable is defective or
not connected, the network is not a 10 base T network, or the Ethernet riser card is not
properly installed in the system unit.
the system unit.
LINK
Jumper
ON
Link Integrity
Jumper
LINK
Jumper
OFF
Empty Pin
Jumper in "Off" Position
Removal and Replacement Procedures
ON
Green LED
Indicator
Twisted-Pair
Connector
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