B&B Electronics 855-10260--74 - Manual User Manual
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Modes of Operation
The McBasic 10/100 has four modes of operation:
Auto Negotiation/PNP
FORCE 10Mbps
FORCE 100Mbps
Selective Advertising AN (All OFF)
NOTE
The McBasic 10/100 cannot be set for Half- or Full-Duplex manually. Duplex is determined
by the link partners connected to the McBasic 10/100.
The McBasic 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 McBasic 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)
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 McBasic media converters installed in pairs, back to
back.
With all switches set to OFF, the unit sends its own Auto Negotiation (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.