D-Link DMC-1910T [3/12] About link pass through

Introduction

Thank you for choosing the 1000Base Gigabit Ethernet Media Converter, The Converter introduced

here provides one channel media conversion between 1000BASE-TX and 1000BASE-LX.

Dual-Wavelength Single-Fiber

These types of Single-Fiber modules combine transmit and receive signals onto one fiber strand

using two wavelengths. This design avoids the budget losses incurred b the single-wavelength

single-fiber technology, and minimizes any possibility of reflections in the system. The units on both

ends of a link are different. One module uses one wavelength to transmit and a second wavelength to

receive, while the other module flips that relationship. For this reason these units are sold in pairs.

About Media Converter

Media Converter is a network technology specified by IEEE 802.3ab and IEEE 802.3z

1000BASE-TX and 1000BASE- LX standards.

About Link Pass Through

When LLCF is enabled, the ports do not transmit a link signal until they receive a link signal from

the opposite port. Link loss is “carried forward” to the managed switch or hub that is sending the

link. LLCF can be used for either the copper or fiber ports.

When LLR is enabled, the fiber port’s transmitter shuts down if its receiver fails to detect a valid

receive link. If one of the optical conductors is bad, the card with LLR enabled will return a no link

condition to its link partner. LLR is used to detect link problems only on the fiber port.