JDS Uniphase IP Video Test Option HST-3000, User Manual

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Appendix A Test Results
Cable Status results
HST-3000 Ethernet Testing User’s Guide
263
– An active 10M or 100M link is established. If a 10M or
100M link is established, the MDI/MDIX status (see “MDI
or MDIX Pair Status result” on page 263 ) is reported.
– An active 1G electrical link is established. If a 1G elec-
trical link is established, the pair status, polarity, and pair
skew for each MDI pair is reported. See
“1G Pair Status
result” on page 264 , “Polarity result” on page 265 and
“Pair Skew result” on page 265 .
– The link is inactive. If the link is inactive, the unit indicates
the type of fault and the fault’s relative distance from the
tester (see
“Fault results” on page 265 ).
MDI or MDIX
Pair Status
result
The MDI/MDIX Status result indicates the resolved wiring
(
MDI
, or
MDIX
) of the near end unit’s RJ-45 jack. For example,
if the far end can not auto-configure its interface, (in other
words, the wiring is fixed), this result can help you determine
whether a straight through or crossover cable is being used or
the MDI/MDIX wiring of the far end port.
– You must know the fixed MDI/MDIX status of the far end
port to determine the type of cable using the near end
MDI/MDIX Status result. For example, if you know that the
far end port is fixed at MDI, and the near end port detects
MDIX, then you can conclude that a straight through cable
is used.
– You must know the cable type used to determine the MDI/
MDIX status of the far end port using the near end MDI/
MDIX Status result. For example, if you know you are
using a straight through cable, and the near end port
detects MDIX, you can conclude that the wiring at the far
end port is MDI.
Table 16 illustrates each of the possible resolutions.
Table 16 HST-3000 Ethernet MDI/MDIX Resolution
Far end port Cable Near end port
MDIX straight through MDI