Connecting The Network Cables - HP ProCurve J8766A Installation Manual

ProCurve Switch vl Modules
Installing the Modules

Connecting the Network Cables

N o t e
Automatic Cable Sensing on Twisted-Pair Ports:
When the ports for the 10/100-TX and the Gig-T vl Modules are in their default
configuration, Auto, both modules automatically negotiate whether the ports
operate as MDI or MDI-X, depending on the cable type and the connected
device's operation. As a result, you can use either straight-through or
crossover twisted-pair cables for all network connections to these modules.
On the 10/100-TX vl Modules, this feature is identified as HP Auto MDI-X; on
the Gig-T vl Module, it is identified as IEEE Auto MDI/MDI-X and it is part
of the IEEE 802.3ab standard. Both features operate the same.
Operation of this feature depends on the port configurations being kept at
Auto. If the configuration is changed to one of the available fixed options (for
example, 100-Full Duplex), the port operates as an MDI-X port. In that case,
to connect the module to another switch or hub, use a crossover cable; to
connect to an end node, use a straight-through cable.
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