INSTALLATION GUIDE
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26
IM-Raptor-1.3.6-EN
PIN NUMBER
MDI PORT
MDI-X PORT
6
BI_DB-
BI_DA-
7
BI_DD+
BI_DC+
8
BI_DD-
BI_DC-
Note: “+” and “-” signs represent the polarity of the wires that make each wire pair.
7.4
Recommendations for Cables in High Electrical Noise
Constant electrical noise can be due to the predictable 50 or 60 Hz AC 'hum' from power circuits or harmonic multiples of
power frequency close to the data communications cable.
Follow these recommendations for copper data cabling in high electrical noise environments:
♦
Data cable lengths should be as short as possible, preferably 3 m (10 ft) in length. Copper data cables should not be
used for inter-building communications.
♦
Power and data cables should not be run in parallel for long distances, and they should be installed in separate conduits.
Power and data cables should intersect at 90° angles when necessary to reduce inductive coupling.
♦
Ground loops which are major cause of noise propagation must be avoided.
7.5 SFP
The Raptor
supports fiber optic ports that can connect to other devices using SFP (Small Form-factor Pluggable) modules.
The fiber optical ports are Multimode (MM) or Singlemode (SM) with LC connectors.
Always connect the TX port of Switch A to the RX port of Switch B.
The SFP modules are available separately from the Accessories list.
