IMC Networks iMcV-FiberLinX-II, Operation Manual

Page: 14 / 60

on the DATA ports on both the Host and Remote modules can be limited
independently).
NOTE
Management packets do not have priority over data packets.
FX/TX LinkLoss and FiberAlert
During normal operation, link integrity pulses are transmitted by all point-to-point
Ethernet devices. When an iMcV-FiberLinX-II receives valid link pulses, it knows that
the device to which it is connected is up, and that the copper or fiber cable coming
from that device is intact. The appropriate “LNK” (link) LED is lit to indicate this. For
troubleshooting information utilizing the LinkLoss and FiberAlert features of the iMcV-
FiberLinX-II modules, refer to Troubleshooting at the end of this manual.
** WARNING **
FiberAlert and LinkLoss features cause data interruptions designed to alert remote
sites of line failures. These data interruptions can be misinterpreted as module
failures when these features are enabled. Enable these features only when the
resulting data interruptions and causes are well understood.
FX LinkLoss
FX LinkLoss is a link integrity monitoring feature that forwards fiber link faults to the
RJ-45 Data port to indicate that a fiber link fault has occurred.
TX LinkLoss
TX LinkLoss is a link integrity monitoring feature that forwards an RJ-45 link fault to
the fiber connected device to indicate that a link fault has occurred.
FiberAlert
FiberAlert minimizes the problems associated with the loss of one strand of fiber.
Normally when a single strand of fiber is lost, the transmitting side of the connection
is unaware that there is a fault. FiberAlert returns faults back on the fiber they came
in on.
Using LinkLoss and FiberAlert
In a typical central site to remote site media conversion, it is recommended that you
enable the LinkLoss and FiberAlert features as indicated in the following:
FiberAlert and LinkLoss
Feature Enabled Fault Location Port affected
FiberAlert Remote Side Only Fiber Fiber
14