IMC Networks SP50 operation manual About Link Integrity, FO LinkLoss, TP LinkLoss

About Link Integrity

During normal operation, link integrity pulses are transmitted by all point-to-point Ethernet devices. When an IMC Networks media converter receives valid link pulses, it knows that the device to which it is connected is up and sending pulses, and that the copper or fiber cable coming from that device is intact. The appropriate “LINK” LED is lit to indicate this. The IMC Networks media converter also sends out link pulses from its copper and fiber transmitters, but normally has no way of knowing whether the cable to the other device is intact and the link pulses are reaching the other end. The combination of FiberAlert and LinkLoss allows this information to be obtained, even when physical access to a remote device (and its link integrity LED) is not available.

FO LinkLoss

FO LinkLoss is a troubleshooting feature. When a fault occurs on the fiber segment (receive side) of a conversion, FO LinkLoss detects the fault and passes this information to the twisted pair segment. If a media converter is not receiving a fiber link, FO LinkLoss disables the transmitter on the media converter's twisted pair port. This results in a loss of link on the device connected to the twisted pair port.

TP LinkLoss

TP LinkLoss is another troubleshooting feature. When a fault occurs on the twisted pair segment of a conversion, TP LinkLoss detects the fault and passes this information to the fiber segment. If a media converter is not receiving a twisted pair link, TP LinkLoss disables the transmitter on the media converter's fiber port. This results in a loss of link on the device connected to the fiber port.

Configuring LinkLoss

TP LinkLoss and FO LinkLoss are always enabled on McBasic TP/FO. Neither is offered on McBasic TP/BNC.

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