IMC Networks iMcV-LIM 10/100, Руководство по эксплуатации

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3
Modes of Operation
The iMcV-LIM 10/100 has four modes of operation:
•
PNP (Auto Negotiation)
•
FORCE 10Mbps
•
FORCE 100Mbps
•
Selective Advertising AN (All OFF)
NOTE
The iMcV-LIM 10/100 cannot be set for Half- or Full-Duplex manually. Duplex is determined
by the link partners connected to the iMcV-LIM 10/100.
The iMcV-LIM 10/100 media converter is typically installed in pairs and provides
compatibility with legacy 10BASE-FL devices, while also providing support for
100Mbps devices. This is a PHY based device to allow very low propagation delays
but in turn the speed and duplex of both its copper and fiber ports must be the same.
For the iMcV-LIM 10/100 to function properly, the copper port must have link before
the fiber port will link up.
In a back to back configuration, both units must have the Plug-N-Play PNP (AN)
switch set to ON for the copper ports to auto negotiate from end to end. In this
mode the fiber link becomes transparent allowing the units at both ends of the link to
function as if they were connected over one copper line. All auto negotiation
signaling is the result of signaling received on the ports of the unit. Only use this
mode with two iMcV-LIM 10/100 media converters installed as a pair.
With all switches set to OFF , the unit sends its own Selective Advertising (AN)
signaling on the copper port. This advertises both FDX and HDX with the physical
speed that is detected on the fiber line. This signaling cannot occur until this fiber
port is active. If auto negotiation signaling is also received over the fiber from the far
end equipment, the auto negotiation signaling on the copper port will include this
information.
In all of the FORCE modes , no auto negotiation signals are sent or acted on. The
unit will blindly send the speed assigned and supports either FDX or HDX data. The
LFD function is only available in the FORCE modes.