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13 Dec 2016

Without optical communication we might be still sending mail, going to the newsstand to buy a newspaper, sending mail and postcards and renting movies, no internet would have been possible, no digital communications as we know it.

Among the many unsung technologies that make all this possible, Dense Wavelength Division Multiplexing (DWDM) is without any doubt one of the most important. As a kind of WDM technology, DWDM has the capability to send multiple signals on the same fiber, using different wavelengths. DWDM devices combine the output from several optical transmitters for transmission across a single optical fiber. At the receiving end, another DWDM device separates the combined optical signals and passes each channel to an...



28 Nov 2016

With the lightning fast changes of today’s technology, staying on the cutting edge can be a great challenge. A company’s data center and infrastructures have become one of the most strategic assets it owns, and conventional wisdom says that in order to support topline business growth, companies must spend money to make money.

However, this axiom is not true when it comes to optical transceivers. Using 3rd-party optics instead of name brand optics from the Original Equipment Manufacturer (OEM) is a smart and innovative way to embrace changes in the dynamic networking and data center hardware markets, while protecting your bottom line by not paying exorbitant prices. This article will briefly explain the value and advantages that...



28 Nov 2016

With the lightning fast changes of today’s technology, staying on the cutting edge can be a great challenge. A company’s data center and infrastructures have become one of the most strategic assets it owns, and conventional wisdom says that in order to support topline business growth, companies must spend money to make money.

However, this axiom is not true when it comes to optical transceivers. Using 3rd-party optics instead of name brand optics from the Original Equipment Manufacturer (OEM) is a smart and innovative way to embrace changes in the dynamic networking and data center hardware markets, while protecting your bottom line by not paying exorbitant prices. This article will briefly explain the value and advantages that...



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.

cisco-sfp-testing

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...



29 Sep 2016

In today’s telecommunication markets, Cisco 40GBASE QSFP+ modules offer customers a wide variety of high-density and low-power 40 Gigabit Ethernet connectivity options for data center, high-performance computing networks, enterprise core and distribution layers, as well as service provider transport applications. In order to help customers have a deeper understanding about the 40G QSFP+ modules, this article will introduce several kinds of connectivity options provided by Cisco.

Features and Benefits of Cisco 40GBASE QSFP+ Module
Main features of Cisco 40GBASE QSFP+ modules include:
  • Interoperable with other IEEE-compliant 40GBASE interfaces
  • Hot-swappable input/output device that plugs into a 40 Gigabit Ethernet Cisco QSFP+...


25 Sep 2016

As is known to all, fiber optic cables are widely deployed in telecommunication networks. It seems that copper cables are out of date. However, copper network is superior to fiber network in some cases as copper cables are stronger and easier to manage than fiber cables. Copper cable also takes the advantage of lower cost than fiber. Besides, copper network is easier to build, which eliminates the process of I/O. Today’s copper cables are able to support data rate of 1G, 10G, 40G and even 100G, among which 10G copper based network is most commonly deployed. Currently, there are two types of standards designed for 10G copper-based network: 10GBASE-CR and 10GBASE-T. Which one is more suitable for you when building a 10G copper based...



15 Sep 2016

Fiber optical transceiver is the most common component in today’s data center communications. But few people realize it. By converting electronic signals into optical signals as transmitters at one end and then converting optical signals into electronic signals at the other end as receivers, it is an indispensable part in data transmission. Different types of transceivers have different applications in reality. Some are used together with singlemode fiber cables in singlemode applications while others are for multimode.

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Use Optical Transceivers Rather Than Copper for Shorter Distance Applications

Copper SFPs provide a high-speed RJ45 data connector interface for unshielded, twisted-pair copper cable. The 1000BASE-T copper...



29 Aug 2016

Nowadays, fiber optic cable is a popular medium for both new cabling installations and upgrades, including backbone, horizontal, and even desktop applications. Although fiber offers various advantages over copper, copper still has a space in telecommunication networks, for example, direct attach copper cables, like HP JD096C 10G SFP+ direct attach copper cable or Cisco QSFP+ breakout cable (Cisco QSFP-4SFP10G-CU5M). The twisted pair cable has been widely deployed for telephone line networks ever since it was first developed in 1881. Today, it has already been extended worldwide mainly for outdoor land lines offering telephone voice services.

What Is Twisted Pair Cable

As a kind of copper wiring, twisted pair cable is made by putting...



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...



28 Jul 2016

Parallel optics is a term representing both a type of optical communication and the devices on either end of the link that transmit and receive information. Compared with traditional optical communication, parallel optical communication employs a different cabling structure for signal transmitting aiming at high-data transmission for short reach multimode fibers that are less than 300 meters. Traditional fiber optic transceivers cannot satisfy the increasing demand for high speed transmission, like 40GbE, while parallel optics technology can be a cost effective solution for 40/100GbE transmission.

MC2210411-SR4E

Comparison between parallel optics technology and the traditional serial optical communication would better explain what parallel optics...