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06 Oct 2016

10G fiber optic network has been widely spread in today’s telecommunication network. The Cisco 10GBASE SFP+ modules offer customers a wide variety of 10 Gigabit Ethernet connectivity options for data center, enterprise wiring closet, and service provider transport applications. If you choose a Cisco switch, Cisco original brand or Cisco compatible modules like SFP/SFP+ might be needed to transfer between optical signals and electrical signals. This article will introduce the 10G IEEE standards and how to select the proper 10G SFP+ module for Cisco switches.

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Understand 10G IEEE Standards

10G fiber optic network is mature now, and there is a wide selection of 10G IEEE standards for different 10G networking applications and...



01 Aug 2016

Direct attach cable, short for DAC, is a form of high speed cable with “transceivers” on either end. They can be used to connect switches to routers or servers. They are becoming increasingly popular in the network industry and widely applied in storage area network, data center, and high-performance computing connectivity etc. The DAC has the advantage of cost-effectiveness compared with the regular optics. Another reason for its increased popularity is that RJ-45 10G is not widely adopted, and most high density 10G switches are delivered with 48x SFP+ ports in 1 Rack Unit. Here are some basic knowledge you may not know but should know about the DACs.

Cisco SFP-H10GB-CU5M

1. No matter in the related article or in product description of some DACs...



27 May 2016

10 Gigabit Ethernet (10GbE) is a group of computer networking technologies for transmitting Ethernet frames at a rate of 10 gigabits per second. It was first defined by the IEEE 802.3ae-2002 standard. Unlike previous Ethernet standards, 10 Gigabit Ethernet defines only full duplex point-to-point links which are generally connected by network switches. 10G connection in telecommunication network is gradually moving from the backbone to layer 2 and layer 3. Both technology and market of 10G optics modules are mature: the 10G optics modules have advanced from XENPAK which is the first generation of 10G transceiver to SFP+ which is now the most popular 10G optics. Besides, the price of 10G modules is becoming lower. Some genius guys even...



18 May 2016

Fiber-optic communication is a method of transmitting information from one place to another by sending pulses of light through an optical fiber. Compared with copper cable, fiber optic cable can support longer transmission distance, high speed, high bandwidth, etc. However, not everything is perfect. There are still some factors that may influence the transmission distance over fiber cables. This article will introduce the most common factors that limit the data transmission distance.

Fiber Optic Cable Type

Generally speaking, the maximum transmission distance is limited by dispersion in fiber optic cable. There are two types of dispersion that can affect the optical transmission distance. One is chromatic dispersion, which is the...



19 Apr 2016

In the past few decades, the Ethernet industry has been working on providing solutions to increase the speed of Ethernet from 1 to 10 gigabits per second. For enterprise LAN applications, 10 Gigabit Ethernet enables network managers to scale their Ethernet networks from 10 Mbps to 10,000 Mbps, while leveraging their investments in Ethernet as they increase their network performance. There are various types of cables and transceivers available for making Ethernet connections at speeds of 10 Gigabit per second. This article will introduce both the copper and fiber connectivity options for 10 Gigabit Ethernet.

Transceiver Options

Standards bodies initially offered several options for the 10-Gigabit transceiver. The one that ultimately...



08 Apr 2016
Introduction to SFP+ Transceiver

In the 10 Gigabit Ethernet world, fiber optical transceivers have been developed along the way to meet the increasing usage and demand for higher-performance servers, storage and interconnects. The small form-factor pluggable plus (SFP+) can be referred to as an enhanced version of the SFP that supports data rates up to 16 Gbit/s. SFP+ supports 8Gbit/s Fiber Channel, 10 Gigabit Ethernet and Optical Transport Network standard OTU2. It is a popular industry format supported by many network component vendors. In order to ensure the high performance of the SFP+ transceivers, one critical point is to deal with the testing issues of them. This article will first illustrate the SFP+ testing challenges in...



06 Apr 2016

Data center has now become one of the most critical and dynamic operations in any business. With all the data processing and transmission, it is only critical that every design aspect and component of your data center is properly optimized, including its fiber optic transceiver technology. The transceiver and other optical components need to meet varied bandwidth requirement for storage, switch, and server applications. Now let’s see how the optical transceivers will promote data centers in the future.

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Small Package Makes Sense

Optical transceivers are becoming smaller, but more powerful, which makes them an important piece in server technology. In fact, even though a transceiver is physically small, it can handle a network...



15 Jan 2016

To support the changing and fast-growing bandwidth demands of data centers, the IEEE published the IEEE 802.3ba standard for 40 Gigabit Ethernet in June 2010. 40 Gigabit Ethernet is a standard that enables the transfer of Ethernet frames at speeds of up to 40 gigabits per second (Gbps), allowing 40 Gigabit Ethernet-enabled equipment to handle traffic at the aggregation and core layers. A right and cost-effective solution for 40 Gigabit Ethernet is very necessary in data center communications. This article will introduce some types of cables and optical transceivers used in 40 Gigabit Ethernet.

The cable applied in 40 Gigabit Ethernet can be optical fiber or copper cable. With regard to cabling, OM3 or OM4 is optimal for the 40 Gigabit...



04 Jan 2016

A direct attach cable (DAC) is a fixed assembly that is purchased at a given length, with the connector modules permanently attached to each end of the cable. The direct attach cable is designed to use the same port as an optical transceiver, but compared with optical transceivers, the connector modules attached to the DAC leave out the expensive optical lasers and other electronic components, thus achieving significant cost savings and power savings in short reach applications.

Types of DAC

The direct attach cable can be divided into different types according to different criteria. According to the cables used, the direct attach cables include copper cable assemblies and fiber optic cable assemblies. Besides, DAC cable assemblies...



28 Dec 2015

10 Gigabit Ethernet or 10GbE is a group of computer networking technologies for transmitting Ethernet frames at a rate of 10 gigabits per second. Nowadays, 10 Gigabit Ethernet is gaining broader deployments by the increasing bandwidth requirements and the growth of enterprise applications. In the world of 10 Gigabit Ethernet, selecting the appropriate 10-gigabit physical media is a challenge, because 10GbE is offered in two broad categories: optical and copper. This article will introduce both optical and copper cabling options for 10 Gigabit Ethernet.

Fiber Optical Cabling

Single-mode fiber (SMF), typically with an optical core of approximately 9 μm (microns), has lower modal dispersion than multimode fiber. It is able to support...