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Is It Possible to Transmit 1310nm/1550nm Over MMF or 850nm Over SMF?

Is It Possible to Transmit 1310nm/1550nm Over MMF or 850nm Over SMF?

In the previous post “What is the difference between single-mode SFP and multimode SFP“, I have mentioned these two points: “Single-mode SFPs (SMF SFPs) work mainly in 1310nm and 1550nm wavelength and is mostly used in long distances transmission environment reaching 2km, 10km, 40km, 60km, 80km and 120km.” “Common multimode SFPs (MMF SFPs) work in 850nm wavelength and is only used for short distance transmission reaching 100m and 500m.” Indeed, we always like to associate multimode fiber with 850nm and…

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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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40G QSFP+ Breakout Cables vs. QSA Module

40G QSFP+ Breakout Cables vs. QSA Module

When one end of the network is running on a 40 Gigabit platform, and the other end of the network is running at lower speeds such as 10 Gbps, migration is required. Using fan-out technology and QSA are two different methods to achieve the migration between 40 Gigabit Ethernet and 10 Gigabit Ethernet. But which is better? Expands the 40G Data Pipe into 4x10G Lanes With Breakout Cables 40G QSFP+ to 4×10 SFP+ breakout cables including direct attach copper cable…

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Transceiver Options for Running 40GbE Over Duplex LC MMF Cable

Transceiver Options for Running 40GbE Over Duplex LC MMF Cable

The use of parallel optics in 40GbE multimode fiber (MMF) cabling require more fiber strands than the 10GbE infrastructures. Thus, data center will require a cabling upgrade to meet the requirement of migration. In this case, cost is a big factor. To help user solve the fiber cost issue, many vendors developed a new transceiver alternative that allow zero-cost fiber migration by reusing the current 10Gbps multimode fiber-optic cabling plant for 40Gbps connectivity. This post will introduce three mainstream transceiver…

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Media Types for 10 Gigabit Ethernet

Media Types for 10 Gigabit Ethernet

Today, the Ethernet cabling systems market is dominated by 10G links. Several physical media types are available to support 10 Gigabit Ethernet applications, including 10GBASE-CX4, SFP+ DAC, fiber optics, and 10GBASE-T (using twisted pair, RJ-45 connectors). In this post, they are introduced one by one. 10GBASE-CX4 CX4 is the first 10G copper standard published by 802.3 (as 802.3ak-2004). It offers the advantages of low power, low cost and low latency and is specified to work up to a distance of…

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Things Should Be Considered When Buying Direct Attach Copper Cables

Things Should Be Considered When Buying Direct Attach Copper Cables

Direct attach copper cables, namely DAC cables, are a form of optical transceiver assemblies used to connect switches to routers and/or servers. They are becoming increasingly popular in the network industry, mainly because the price difference is so large when compared with regular optics. There are various versions of DACs with different specifications on the market today which make us in difficult choices. So, what should be considered when we buy DAC cables? Just keep reading, you may find the…

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Differences Between Phone & Network Cable

Differences Between Phone & Network Cable

When connecting the computer to the network devices like switches and routers, you must use a network cable, namely an Ethernet patch cable. A regular phone cable will not work, even though it looks similar to a network cable. There are some differences between phone cable and network cable, including: Network cables are usually thicker and rounder than a telephone cable. Network cables, including Cat5, Cat5e, Cat6, Cat6a, etc., are twisted pair cables for carrying signals in structured cabling for…

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10 Gigabit Ethernet Server Connectivity Options

10 Gigabit Ethernet Server Connectivity Options

10 Gigabit Ethernet is becoming increasingly common, physics of the cabling plant including latency, distance, power consumption, technology availability as well as cost should be carefully considered by users when designing for 10 Gigabit Ethernet cabling infrastructure. This post introduced several media and transceiver options are available today for 10 Gigabit Ethernet server connectivity. 10 Gigabit Ethernet Over Copper Many IT departments still use copper cabling for switch-to-switch or switch-to-server connections in 10 Gigabit Ethernet due to the low cost…

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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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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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