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Heavy Duty Edge Switches Installation and User Guide(07/05)
55
* Note: The use of either multi-mode or single-mode fiber to operate at 100Mbps speed
over long distances (i.e., over approx. 400 meters) can be achieved
only if the following
factors are both applied:
• The 100Mb fiber segment must operate in full-duplex (FDX) mode, and
• The worst-case OPB of the fiber link must be greater than the fiber cable’s
passive Attenuation.
(Attenuation = Cable loss + LED aging loss + Insertion loss + safety factor)
3.8.6 Connections to NICs
which support Auto-Negotiation, RJ-45 ports
The copper ports of Black Box LBHXXX-Series Edge Switches will function
properly with NICs (Network Interface Cards) which support Auto-Negotiation, and the
Fast Link Pulse (FLP) coding for the 100BASE-TX signaling system. When connecting a
NIC to the LBHXXX-Series, it may be necessary to reload the NIC drivers on the user
device if the NIC has been communicating with a protocol other than 100BASE-TX (such
as 10BASE-T). When 100Mb operation is agreed and in use, the 10/100 LED is
illuminated steady ON and is OFF, if 10 Mbps traffic.