• March 19. 2022

When selecting or configuring a network switch, you often encounter ports labeled G, F, E, and S. Understanding the differences between these port types is essential for proper network design, cable selection, and optical module compatibility. Below, we break down each port type in detail. 1. What Is an S Port on a Switch? S port is fully called serial interface, also known as high-speed asynchron...

• March 17. 2022

The intelligent building network is responsible for the data transmission tasks of various building automation systems, such as lighting, air conditioning, electrical, monitoring, computers, wireless devices, etc. In this blog, ETU-LINK will introduce the networking solution of intelligent building. As the intelligent buildings are relatively dense and the business volume is relatively large,...

• March 15. 2022

In this blog, ETU-LINK will talk about 4G base stations and common types of optical modules. The base station can be divided into two modules: the RRU for transmitting signals and the BBU for processing signals. The BBU is small and exquisite, with low power consumption, while the RRU is large and has high power consumption. Because the base station is divided into two parts to work sepa...

• March 04. 2022

25G SFP28 is the mainstream 25G hot-pluggable optical transceiver defined by SFF-8636 MSA standard, widely deployed in 5G fronthaul, cloud data center ToR switches and 100G QSFP28 breakout interconnection. This article fully sorts all mainstream 25G SFP28 models, technical parameters, fiber matching rules and typical application scenarios for network procurement and engineering deployment. Ⅰ. Basi...

• February 23. 2022

Cloud computing and big data are booming in my country. In order to provide enough bandwidth, many access switches have been developed to aggregation/core switches that can connect to 40G Ethernet. 40G networks have been widely used in data centers, and optical modules are one of the indispensable components for data center equipment interconnection, so ETU-LINK will give you an inventory of the t...

• January 26. 2022

The communication triangle tower must be familiar to everyone. In this article, ETU-LINK will introduce the base station under the communication triangle tower and the application of optical modules in the base station.   The communication triangular tower is composed of antenna, computer room, base station, feeder, and supporting equipment. The antenna is at the top of the triangul...

• January 19. 2022

Medium and long-distance optical modules (10G ER/80G ZR, 25G ER, 50G long-haul transceivers) integrate built-in signal amplifiers including APD avalanche photodiode and TIA transimpedance amplifier. This article compares traditional optical regenerators and internal amplifier schemes, explains amplification working principle, circuit automatic gain control and practical application value for metro...

• January 14. 2022

CPRI is the abbreviation of Common Public Radio Interface, a standardized communication protocol widely adopted in mobile communication base stations. CPRI plays the role of transmitting baseband I / Q signals to radio units in traditional BS (base station). CPRI has efficient and flexible I / Q data interfaces for various standards, such as GSM, WCDMA, LTE, etc. Unlike the data center, the CPRI o...