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Migration From CWDM to DWDM

Migration From CWDM to DWDM

CWDM (Coarse Wavelength Division Multiplexing) and DWDM (Dense Wavelength Division Multiplexing) have their own advantages and their combination can greatly enhance transmission performance while reducing OPEX and CAPEX spending. Hybrid CWDM/DWDM solution is a flexible and scalable solution which offers many benefits to network carriers, especially in network expansion and upgrade. Today, I will introduce a simple, plug-and-play option for creating hybrid systems of DWDM channels interleaved with existing CWDM channel plans. Understanding the Principle of Hybrid CWDM/DWDM The difference…

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What Is The Difference Between Singlemode SFP and Multimode SFP

What Is The Difference Between Singlemode SFP and Multimode SFP

The singlemode SFP and multimode SFP here mean the SFP transceivers which work at different types of optical fibers, ie simglemode SFP will work with singlemode fiber, while multimode SFP will work with multimode fiber. So, what’s the different between them? And what should we notice when using them. Today, we are going to have a discussion around this topic. Singlemode SFP vs Multimode SFP Singlemode SFP Singlemode fiber (SMF) has much tighter tolerances for optics used. The core is…

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Difference Between Tight-Buffered Breakout and Distribution Cables

Difference Between Tight-Buffered Breakout and Distribution Cables

Tight-buffered cables are optimal for indoor applications. With the design of armored layer, they are also used for indoor/outdoor applications. They are mostly applied in breakout cables and distribution cables. Today, I’d like to talk the difference between these two types of tight-buffered cables, mainly in two aspects. Difference in Cable Structure Tigh-buffer breakout cables and distribution cables both consist of 900μm tight-buffered fibers. But they differ from each other in the cable structure. Tight-Buffered Breakout Cables The tight-buffered breakout…

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Cleaning Recommendation for Optical Transceiver

Cleaning Recommendation for Optical Transceiver

We have always emphasized that proper fiber cleaning of connector end-face is very important to ensure the performance of the whole fiber systems. In fact, optical transceiver module is no exception as the contamination of the optical port of a transceiver will also lead to network failure. However, many people overlook the importance of optical transceiver cleaning or do not clean it in a proper way. This is why I want to talk this topic today. When to Clean? As…

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Understanding 10GbE, 40GbE, and 100GbE Short Range Optical Transceivers

Understanding 10GbE, 40GbE, and 100GbE Short Range Optical Transceivers

Demands for higher speeds in both telecom and datacom network are rapidly increasing due to the needs for high-bandwidth consumption. Currently the 10GbE system is still the dominant deployment in the optical transceiver market. But the 40GbE and 100GbE have come from behind since last year. Short range optical transceiver is the most commonly used type in data center or other indoor applications. This post is going to illustrate the short range optical transceivers for 10GbE, 40GbE and 100GbE. 10GBASE-SR…

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How to Choose 40G QSFP+ Modules for Multimode Applications?

How to Choose 40G QSFP+ Modules for Multimode Applications?

With the popularity of 40G QSFP+ modules in datacom industry, there are more alternatives for choose to replace the traditional 40GBASE-SR4 QSFP+ modules for multimode applications. To choose the most proper 40G QSFP+ modules for your applications not only offers the high performance but also saves more cost in the project. Types of 40G Multimode QSFP+ Modules Currently, there are three kinds of multimode 40G QSFP+ modules available in the market. They are: Type Wavelength Distance Connector Type 40GBASE-SR4 QSFP+…

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Copper Cabling Choices for 10G Ethernet

Copper Cabling Choices for 10G Ethernet

Nowadays, though fiber becomes popular with the benefit of delivering the lowest latency, many IT departments still use copper cabling for switch-to-switch or switch-to-server connections in 10G Ethernet (10 GbE). Currently, there are two major copper cabling technologies applied for 10 GbE over copper. What are they? As the following table shown, one of the 10GbE copper cabling options is the SFP+ Direct Attach Copper Cable (DAC Cable), and the other one is the 10GBASE-T with twisted-pair Ethernet cable. In…

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PLC Splitters Deployment Strategy—Cascaded or Centralized?

PLC Splitters Deployment Strategy—Cascaded or Centralized?

PLC splitters is commonly used fiber optic splitters of fiber optic networks such as FTTx (e.g. FTTH, Fiber to the Home) and PON (Passive Optical Network). In a PON system, the PLC splitter functions to share both cost and bandwidth of the OLT (Optical Line Terminal) among multiple ONTs (Optical Network Terminations) as well as reducing the fiber lines required in the OSP (outside plant). Depending on the customer distribution, there are two common deployment strategies of PLC splitters—Cascade and Centralized. Cascaded Splitting…

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Top 3 Cisco Catalyst Switches & Compatible Transceiver Options

Top 3 Cisco Catalyst Switches & Compatible Transceiver Options

Cisco offers a variety of switches specifically designed for different functions. Catalyst switch family is one of the most successful product lines of Cisco switches, representing one of the most popular LAN switches on the market today. This post will present three top Cisco Catalyst switches and their transceivers. 1. Cisco WS-C2960-24TC-S The Cisco WS-C2960-24TC-S is a type of Cisco Catalyst 2960 LAN series. It features 24 10/100 access ports and 2 dual-purpose uplink ports as Gigabit Ethernet port or…

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Three Patching Configurations for Data Center Rack Management

Three Patching Configurations for Data Center Rack Management

In today’s data center, distribution patch panels and active equipment such as switches, routers, and so on are usually arranged in either the same rack or in two racks located directly next to one another. Thus, to choose a proper patching configuration which is suitable for your network is very necessary. In this post, three commonly used patching configurations are presented. Interconnect The interconnect patching solution is usually applied in the application that components are divided over two racks. As…

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What Loaded Options Can You Choose for Rack Mount Fiber Enclosures?

What Loaded Options Can You Choose for Rack Mount Fiber Enclosures?

Rack mount fiber enclosure with various rack unit configurations, such as 1U, 2U, 4U, etc. plays a very important role in cable patching, storage and protection for rack fiber cable management in the data center. With various loaded options, they can satisfy all kinds of applications according to users’ requirements. This tutorial will present the common loaded options that you can choose for rack mount fiber enclosures. Loaded With Fiber Adapter Panels (FAPs) Rack mount fiber enclosures loaded with fiber…

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