Transition Networks
SPOEB10xx-105 User Guide
33618 Rev. C
https://www.transition.com/
Page
5
of
16
4 - Fiber Full/Half Duplex
Up
- The cable distances for the fiber port are constrained by the cable requirements.
Down
- The cable distances for the fiber port are constrained by the 512-Bit Rule.
5 - LPT – Link Pass Through
Up
- Enables the
LPT
function.
Down
- Disables the
LPT
function.
The Link Pass-Through allows the media converter to monitor both the fiber and copper
RX (receive) ports for loss of signal. In the event of a loss of an RX signal on one media
port, the media converter will automatically disable the TX (transmit) signal of the other
media port, thus, “passing through” the link loss. The far-end device is automatically
notified of the link loss, which prevents the loss of valuable data unknowingly transmitted
over an invalid link. See diagram below.
6 - PSE Power
Up
- Enables PSE power.
Down
- Disables PSE power.
The IEEE 802.3af
™
standard allows a device to provide power (PSE - Power Sourcing
Equipment) to a remote device and for a remote device (PD - Powered Device) to accept
and use this power over a twisted pair interface.
7 - PSE/LPT (
POE power off LPT - OPEN = Disabled)
Up
- Disable PSE/LPT.
Down
- Enable PSE/LPT.
This feature is used to re-initialize a powered device (PD). If the fiber RX (receive) link
drops with the PSE/LTP switch in the enabled position (down), the PSE power
will turn OFF for two seconds then turn back ON to re-start the remote device.
The power will remain ON to allow the remote PD to re-establish the link with the
media converter. Note that this feature requires DIP switch 5 (LPT) to also be enabled.
8 - Reserved
Reserved for future use.
