• August 05. 2021

In this article, ETU-Link will introduce the connection between the server and the switch and the construction scheme of the campus network. Speaking of the server, in fact, it is a little similar to the computer we use in daily life, which is the equipment to provide computing services. The composition of the server includes processor, hard disk, memory, system bus, etc. As the server needs to re...

• June 29. 2021

According to the transmission distance, 25G optical modules can be divided into 25G SFP28 SR 100m, 25G SFP28 LR 10km, 25G SFP28 ER 40km, etc. In this article, ETU-LINK will focus on introducing the 25G SFP28 LR 10km optical module.     The 25G SFP28 LR 10km optical module has a working wavelength of 1310nm, dual LC connector, DFB laser and PIN photodetector, built-in CDR circui...

• May 13. 2021

The flattening of the network architecture has greatly promoted the development of 100G high-speed interfaces. Many data centers have also upgraded from 25G networks to 100G. However, when high-speed switches are interconnected with low-speed switches, we will encounter the problem of insufficient SFP28 ports. At this time , We can use ETU CVR-QSFP28-SFP28 converter module to conver...

• April 14. 2021

With the mature development of 100G technology and the advent of 100G products, the deployment of large enterprise network and data center is evolving towards 100G. At present, 100G optical modules on the market include CFP, CFP2, CFP4, QSFP28 and CPAK. The sizes of 100G optical modules in different packages are different. Among them, the 100G optical module in QSFP28 package has the smallest...

• April 10. 2021

Two important development trends of optical modules are to increase the transmission rate and extend the transmission distance. However, as the transmission rate increases, the signal transmission distance will be limited by many factors, such as chromatic dispersion, nonlinear effects, and polarization mode dispersion. These factors will limit the increase in transmission rate and trans...

• April 02. 2021

A router is a hardware device that connects two or more networks. It acts as a gateway between networks. It is a dedicated intelligent network device that reads the address in each data packet and then decides how to transmit it. Routers can be divided into backbone routers (core routers), enterprise-level routers, and access-level routers.   Generally, backbone routers have multiple optical ...

• March 30. 2021

Since 2019, 400G has become a hot topic in the optical communications industry. Several leading optical module manufacturers in the world have launched their own 400G optical modules and most of them have adopted QSFP-DD packages. As early as March 21, 2016, the QSFP-DD MSA team began to plan to develop the QSFP-DD high-speed interface, and experienced the resolution of a series of issues suc...

• March 20. 2021

With the increasing demand of data center for bandwidth, the network rate is developing towards a higher rate, and there is bound to be the need for network upgrading. There are two upgrade paths for the network from 10G to 100G, namely 10G-25G-100G and 10G-40G-100G. End users seem to prefer 25G. Why? ETU-LINK will tell you.   All this can be said from the rise of 25 Ethernet. Data center TOR...