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06 May 2016

Quad small form-factor pluggable plus (QSFP+) direct attach copper (DAC) cables are suitable for in-rack connections between QSFP+ ports of EX Series switches. They are suitable for short distances of up to 16.4 ft (5 m), making them ideal for highly cost-effective networking connectivity within a rack and between adjacent racks. This article will introduce EX Series switches and QSFP+ DAC for EX Series switches.

Introduction to EX Series Switches

EX Series switches deliver scalable port densities and carrier-proven high availability features that consolidate legacy switch layers, helping to reduce capital and operational expenses and advance the economics of networking. For example, the EX 4200 series Ethernet switches with...



04 May 2016

In today’s data center, more bandwidth is needed to support the use of server virtualization where multiple virtual machines are combined on a single physical host server. To meet the ever growing need to cost-effectively deliver more bandwidth, SFP+ direct attach cables deliver lower power, lower latency and higher density for today’s data centers and storage area networks.

Direct attach cables (DAC) are high performance integrated duplex data link for bi-directional communication. And a SFP+ direct attach cable, also known as twinax cables, uses SFP+ MSA and copper “twinaxial” cable with SFP+ connectors on both sides, provides 10 Gigabit Ethernet connectivity between devices with SFP+ interfaces. SFP+ direct attach copper...



14 Mar 2016

40 Gigabit Ethernet era is already upon us and makes a contribution to satisfying the increasing demands of higher throughputs and bandwidth. The 40-Gbps Ethernet transfers data at a rate of 40 gigabits per second over Ethernet. The biggest market for 40G Ethernet (40GbE) is in data center for interconnection links with servers and storage area networks. How to deploy 40G Ethernet? This article will introduce some information related to 40G cabling and transceivers options.

Cables for 40 Gigabit Ethernet

40G cables can provide inexpensive and reliable 40G speed connections using either copper cables with distances reaching up to 30ft (~10 meters length) or active optical cables reaching even 300ft(100 meters). Cables can be divided...



01 Mar 2016

With the development of the SFF-8436 Multi Source Agreement, many vendor are now offering a variety of IEEE- and MSA-compliant Quad Small Form-Factor Pluggable Plus (QSFP+) devices for fiber networks. And there are basic three 40G QSFP+ optics for this standard: 40G LR4 QSFP+ transceiver, 40G SR4 QSFP+ transceiver and 40G LR4 parallel single mode (PSM) transceiver. This article will take a close look at these 40G QSFP+ optics for high-density 40 GE connectivity.

40G LR4 QSFP+ Transceiver

Conforming to the 802.3ba (40GBASE-LR4) standard, the 40G LR4 QSFP+ transceiver together with the LC connector can support an optical link length up to 10 kilometers over single mode fiber. For example, the following Juniper JNP-QSFP-40G-LR4...



07 Dec 2015

With the economics-driven growth of global regional and local fiber communication network over the past few decades, the IEEE 802.3 ba 40Gb/s Ethernet standard was published in June, 2010. In order to meet the data transmission needs in the market, a high-performance and flexible implementation of the IEEE 802.32012 for 40Gbps Ethernet - 40GBase optical transceivers are developed and widely used. The 40GBase optical networking equipment transfers data at a rate of 40 gigabits per second over Ethernet.

40GBase optical transceivers, compliant to the IEEE standards mainly include CFP and QSFP (quad small form-factor pluggable). Today, let’s mainly discuss on how to choose the 40G QSFP transceiver. As the 40-Gigabit QSFP transceivers are...



07 Nov 2015

With the demand for improved bandwidth, greater flexibility, infrastructure simplification, ease of migration, 10GBASE-T specification was lauched as a cost-effective solution to reach the majority of switches and servers in the data center. This article looks at what is driving choices for deploying 10 GbE and how 10GBASE-T will lead to broader deployment. It also compares 10GBASE-T with other media options for 10 Gb Ethernet.

What Is 10GBASE-T

10GBASE-T is an IEEE 802.3an standard which supports the creation of technology that is capable of transmitting 10 Gigabit Ethernet up to 100 meters over four pairs of CAT-5 balanced copper cabling system. It is an exciting technology that provides end users with cost-effective media to...