Introduction

In this article we will discuss about the 10BASE-LR Ethernet standard and what is the difference between 10BASE-LR and 10GASE-ER. So you can have a basic understanding for 10BASE-LR technology to understand the basic solutions to 10BASE-LR.

What is the 10BASE-LR technology?

10BASE-LR ("long reach") is a port type for single-mode fiber and uses 1310 nm lasers. Its Physical Coding Sublayer 64b/66b PCS is defined in IEEE 802.3 Clause 49 and its Physical Medium Dependent PMD in Clause 52. It delivers serialized data at a line rate of 10.3125 GBd. The 10GBASE-LR transmitter is implemented with a Fabry–Pérot or Distributed feedback laser (DFB). DFB lasers are more expensive than VCSELs but their high power and longer wavelength allow efficient coupling into the small core of single-mode fiber over greater distances.