Feature: Communications
audio transmission, passive optical networks (PON), to multiplexing and simplex networking.
QSFP transceivers QSFP stands for quad (four-channel) small form-factor pluggable transceiver (Figure 2), and is used for 40 Gigabit Ethernet (40GbE) applications. Te 40G QSFP optical module is a compact hot-swappable module that provides four transmission channels in one pluggable interface, each with data rate of 10Gbps. Compared with SFP+, QSFP modules can increase port density by four times. Further demand for higher data rates has
led to the development of QSFP28, which supports 28Gbps data rates on each of its four channels and, both, single- and multi- mode applications for distances to 100km. It also uses four wavelengths, some of which can be enhanced using CWDM technology, with each channel carrying up to 28Gbps. On the other hand, LanWDM technology
is used when the distance between the channels is less than five nanometres to
allow for a longer distance reach. A popular configuration of the transceiver
is the 100G QSFP28 DWDM PAM4 solution in QSFP28 format, which can connect multiple data centres within 80km distance. Te advantage of this solution is that clients can build an embedded DWDM network by using this transceiver directly in the switch. An advanced version of QSFP is
QSFP-DD (dual density); it has eight channels, allows for double speed on a single channel, and can carry 400G over just one transceiver.
CFP transceivers Te CFP module is a hot-pluggable transceiver that serves 100G interfaces; see Figure 3. Different types of this module, such as CFP2, CFP4 or CFP8, can support ultra-high bandwidth requirements of data communication networks, including next- generation high-speed Ethernet. Te most recent module, the CFP8, is future-proof for supporting 800Gb/s.
Similarly, the 100G CFP coherent module
supports a range of applications, from 80km interfaces to 2,500km DWDM links, and can be configured to optimise power dissipation for a given application. Tese transceivers are primarily used in
WAN, Metro, wireless basestations, video and other systems. Tey have been widely implemented in enterprise data centres, and high-performance computing and Internet provider systems due to their long-distance abilities and high speeds.
Unique solutions? With different applications requiring unique solutions, there is always at least one suitable type of transceiver. Whether network owners are looking for higher bandwidth at the expense of distance, or they need strong connectivity over tens of kilometres, there is a wide selection of modules. Salumanus has delivered over 500,000
optical modules in the last few years and offers technical support to clients worldwide to make the most of their optical networks.
Southern Manufacturing & Electronics Advertorial Feature
Southern Manufacturing & Electronics (February 8th-10th, Farnborough International) is the UK’s largest and longest-running electronics show. Returning for 2022, the event brings together an incredible range of international suppliers, including components, PCBs and consumables, plus CEMs and many other subcontract service providers. The show is also the place to see the latest production hardware in action, discover the latest software and business management tools, source consumables and industrial furniture, plus everything else your electronics business needs to operate efficiently and profitably.
L
eading companies taking part include production hardware specialists such as Blundell Production Equipment, Mycronic,
and ASK Technology. You’ll also find a vast array of components from top vendors like Wurth Electronics, Easby Electronics, Telegartner, Midas Displays, Yamaichi Electronics, Sinclair & Rush and Transfer Multisort Elektronik. There are also the latest offerings from specialist suppliers such as ESI Technology, MagDev, RF Solutions and Nexus Memory. The numerous service suppliers participating include total contract production from organisations such as Nemco, Cogent Technology, Volburg and Corintech, to PCB production from European Circuits and Shenzen X-Mulong plus many more.
technologists and experts are waiting to give you the tools you need to navigate the challenges you’ll face in the coming year. Registration is free and the seminars are open to all visitors. Safety is top of the agenda; with wide-
And that’s not all; the show’s
outstanding free technical seminar programme gives you the opportunity to transform your understanding of the issues facing manufacturing industry today, from advanced materials, reducing energy usage to life after Brexit. An incredible line-up of leading
ranging anti-infection measures in place, among them purified fresh air circulation throughout the facility, Farnborough International Exhibition is a comparatively low-risk environment. Entry is free, and there’s free on-site parking and a free dedicated bus service between both of Farnborough’s mainline railway stations and the exhibition. To register for free entry, simply visit
www.industrysouth.co.uk. You can follow all the latest news from the show on Twitter @industry_co_uk #southern22
www.electronicsworld.co.uk November 2021 27
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