Lantronix S3100 Series, Инструкция по установке

Страница: 13 / 19

Lantronix S3100 Install Guide
33581 Rev. C https://www.lantronix.com/ Page 13 of 19
Product Features
The features described and illustrated in this section include:
•
Link Pass through
Link Pass Through (LPT)
This function causes loss of link on one side of a media converter to be passed through to the other side,
so that upstream equipment can see fault conditions that would otherwise be hidden by the media
converters.
The LPT feature allows the Device to monitor the Fiber RX (receive) ports for loss of signal. For example,
when the Fiber #1 link on the near end device is lost (1), the local Device turns off the fiber transmit on
Fiber #2 (2), thus, “passing through” the link loss. The remote Device disables the Fiber #1 link to the far-
end device (3), which prevents the loss of valuable data unknowingly transmitted over an invalid link.
Note that although the link from local fiber #2-Tx to remote #2-Rx is disabled, the link from remote #2-Tx
to local #2-Rx is still alive (4). The LPT process is illustrated in the figure below.
Figure 9: Link Pass Through (LPT)
Local
Media
Converter
Remote
Media
Converter ①
②
④ ③
Near-End
Device
Far-End
Device
Original fault on the Port-1
Local converter turns off the
fiber transmit on port-2
remote converter
disables its Port-1
This direction of link still
valid
#1
#2-Tx #2-Rx
#1
#2-Rx #2-Tx