Auto Negotiation On Imcv-Lim - IMC Networks iMcV-LIM Operation Manual

FA is used when connecting to a device that does not support FEF. If an FEF signal is
sent to a device that does not support FEF, the device acts as if there is still a good
connection. The FEF signal is mistaken for data. FA works similar to FEF, in that
when there is a fault in one direction of the fiber, it acts on the fiber in the opposite
direction. But unlike FEF, FA sends no signal. Because of this, FA can not be
enabled on both ends. If it is enabled and a fault occurs, FA will turn signal off in the
opposite direction; the device on the other side of the fiber will see the loss of signal
and engage FA, turning off signal. The net result will be the signal turned off in both
directions, even after the fault has been repaired.
It is highly recommended that only one is chosen, either FEF or FA. If both are
selected FA will take precedence over FEF.

Auto Negotiation on iMcV-LIM

iMcV-LIM modules include the feature Auto Negotiation. When Auto Negotiation is
enabled, the module negotiates as a 100 Mbps full-duplex device. If the connected
device can operate at 100 Mbps full-duplex, a link is established. Auto Negotiation
(DIP Switch #1) is enabled by default.
If the twisted pair port on the other device does not have the ability to Auto
Negotiate or if the 100 Mbps half-duplex connection is desired, then Auto
Negotiation must be disabled. Half- and full-duplex settings must be set manually
and match on does devices.
The following diagram shows a typical application and with three possible
configurations.
End-to-End Connection
Half-Duplex
Full-Duplex
Full-Duplex
Configure Auto Negotiation on an iMcV-LIM by adjusting the DIP Switch setting (for
unmanaged modules) or via the management software. Refer to the DIP Switch table
for switch location and settings.
Switch
Configure HDX manually
Configure FDX manually
Auto Negotiation is ON
7
TX/FX
Auto Negotiation is OFF
Auto Negotiation is OFF
Auto Negotiation is ON