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Link Fault Pass Through (LFPT)
Link Fault Pass Through (LFPT) is a troubleshooting feature that combines TX and FX
LinkLoss from both the local and remote iMcV-Giga-MediaLinX modules. LFPT is
enabled by turning on both FX and TX LinkLoss on both modules. This feature allows
either end of the conversion to detect a link fault occurring at the other end of the
media conversion chain. FiberAlert can also be enabled at the main site.
1.
A cable fault occurs on the remote twisted pair.
2.
TX LinkLoss detects the fault and disables the OPTICS (or UPLINK) port.
3.
FX LinkLoss detects the fiber loss and disables the DATA port.
The link fault is passed through the media conversion and is observed at each end. It
acts just like it would if the devices were directly connected.
If a Fault occurs, then the troubleshooting LED will blink, to indicate in what direction
the fault occurred. For example, with TXLL and FXLL enabled on each media
converter, if the fiber segment breaks, the FXLL LED will blink.
For more information on LinkLoss/FiberAlert, visit the IMC Networks Web site at
http://www.imcnetworks.com/support/
in a specific configuration, contact IMC Networks Technical Support at
(800) 624-1070 (U.S./Canada), +32-16-550880 (Europe) or via e-mail at:
techsupport@imcnetworks.com.
Troubleshooting
•
During installation, test the fiber and twisted pair connections with all
troubleshooting features disabled. Once the physical connections have been
established, the troubleshooting features of LinkLoss and FiberAlert can be
enabled by using the DIP Switches or configuring them using the iView²
software. However, it is important to remember that software will override
hardware settings.
•
Although a specific link segment, either the copper or the fiber, can be
established, if the LNK LEDS do not reflect a state of active power, it is best to
connect both segments.
•
If a SM fiber transceiver is deployed for a short distance application, saturation
may occur, contributing to loss of data or link. In such a case, add an optical
attenuator to the fiber connection.
If unsure of how to implement these features
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