Horizon Quantum - DragonWave Delivering from 2 to 4 Gbps per link, Horizon Quantum represents the next generation in packet microwave technology and sets a new benchmark for performance. With dual-channel capability, this split-mount system is a step change in spectral efficiency, capacity, nodal intelligence, and operational simplicity; all while occupying only half a rack unit and consuming the lowest power per bit of any solution today. In addition, the Horizon Quantum’s integrated switching means that it can provide aggregation and restoration in a single unit. With this level of performance – in a packet microwave system that is remarkably simple to install and operate – operators can now avoid the high cost and long delays associated with fiber deployments, yet achieve the capacity and reliability they require for all of their future applications and services. Solution Highlights:
Improved Dutch helix/helical for WLan Improved Helical Antenna Design for 802.11b WLAN By: PA0HOO October the 17th 2002 To slow? Dutch English N.B: (Click here to jump to the improved PVC helix design) Preface The weekend of October the 17th 2002 we tried to set up an 802.11b WLAN radio link over just 200m. The radio path 'Direct sight', seen from the roof. As we had to bridge about 200 m, an external antenna was a must. Making your own path calculation Click here to calculate the distance you can bridge with a given antenna. The connections for the external antennas These pictures show how the external antenna connections were made. Our experience: PTFE cables don't melt while soldering. 'The Antenna'At the site of Remco PA3FYM we found the perfect construction description of a classical helix antenna, using today's materials. The DisappointmentIt was very disappointing to find out that 'the thingy' we made wasn't performing at all. The dimension were OK, all sizes were according to the known formulas. The design The making The test
15 Online Tools that You Will Come to Love as a Tech | EmergingT I have compiled a list of 15 free online tools that will help you greatly as a tech. I’m sure that there are other good ones that I have left out so please feel free to post the ones that you like as well. IPTools offers a wide variety of online networking tools. With this site you can look up IP address information, check spam databases, run pings, run traceroutes, lookup WHOIS information and much more. BugMeNot allows you to find and share logins for sites that require you to register. SpeedTest.net allows you to test your Internet connection speed. Del.icio.us is a social bookmarking site that allows you to bookmark sites and view them from any computer. Omnidrive is an online storage service that allows you to upload large files, access them from any computer, and share them with other people. 10 Minute Mail allows you to create temporary email addresses that expire after 10 minutes. Free Password GeneratorFree Password Generator generates very strong and unique passwords.
Backhaul (telecommunications) In a hierarchical telecommunications network the backhaul portion of the network comprises the intermediate links between the core network, or backbone network and the small subnetworks at the "edge" of the entire hierarchical network. In contracts pertaining to such networks, backhaul is the obligation to carry packets to and from that global network. A non-technical business definition of backhaul is the commercial wholesale bandwidth provider who offers Quality of service (QOS) guarantees to the retailer. It appears most often in telecommunications trade literature in this sense, whereby the backhaul connection is defined not technically but by who operates and manages it, and who takes legal responsibility for the connection or uptime to the Internet or 3G/4G network. See also hotspot contracts below. Other examples include: Backhaul capacity can also be leased from another network operator, in which case that other network operator generally selects the technology.
helical/helix antenna 2.4 GHz HOWTO Gmail Tips - The Complete Collection Gmail Beta: First Impressions The other day, I received an "invitation" to beta test Google's new "Gmail" email service. After having tried and used literally dozens of web-based email services over the years, I decided to see what the buzz was all about, so I followed the Invitation instructions, and within a couple minutes, I had a new Google Gmail account. First off, please note that this article is based on the pre-release beta of Gmail, so presumably, the public release will have additions, changes, and improvements. Webmail While Web-based email is nothing new, Gmail introduces some new and unique concepts. But why use Webmail when I have a good client in Outlook? I'm going to first walk you through some of the "features" that make up Gmail. Advertising Let's start off with the "tough" issue first: Advertising. Gmail does not "read" your email. Google has been extremely open and forthcoming about its privacy policy and process. OK, I'll step down off of my soapbox now. Logging In 1.
Wireless Network Design , Engineering and Mapping Services Wi-Fi 2.4GHz helical antenna you can build! Wi-Fi point to point helical 2.4GHz antenna you can build! A while ago I thought I'd try my hand at building a 2.4GHz Helical. It was a sobering experience. The first design I tried to duplicate was Jason Heckers. I had read mixed reviews of his design. There was much conjecture regarding the dielectric constant of PVC and it's impact on tuning. The outside diameter was 38mm. Note in this chart that 14db return loss = a minimum target SWR of 1.5:1, 18db = an acceptable SWR of 1.29:1. The actual return loss measurements I got were less than satisfying and, despite claims by others to the contrary, my creation actually resonated higher than the design target, an interesting twist I didn't expect. Forging ahead I performed my gain tests. The best gain I was able to achieve with the helix pointed at the source was only 4 dB over the best half wave signal (4dBd) or 6dBi. Armed with this information my next prototype was based on the W0OQC design. Two things are for certain though.
Introducing EchoLink High Speed Internet - Nebraska, Wyoming Copper Cactus J pole antenna - 2 metter 70 Cm dualband 2 meter 70 Cm Copper Cactus J-Pole Antenna Home Brew Dual Band J-Pole Antenna Plans How to Build a Dual-Band Antenna for 2M/70cm? Your going to like this 2/70 Dual Band J-pole Antenna Plans known as the Copper Cactus Dual Band J-Pole, This home-brew j-pole antenna is easy to build and sturdy, While looking for an antenna project to build, I remembered seeing a Marine antenna called the Super J-Pole in the which had db gain over a quarter wave ground plane. I have had very good results working with copper J-Poles, so I built my refined version of the classic J-Pole. Here is a schematic drawing of the dual band j-pole antenna plans ( Click Here ) Word docDimensions j pole PDFPrint Instructions for this J-Pole Here is a nice calculator as well showing the proper lengths for a given frequency. Materials dual band j-pole antenna plans All the materials except the S0239 fitting can be found at any good hardware store, and the whole antenna can be made in less than an hour. Part’s List Tools needed
12 Unique Email Services You Should Know About « Ijaar We all have our regular email accounts on Gmail, Hotmail or any other service of our choice. However, there are times when you don’t want to use your regular email address for one reason or another. For such times, when you need a special type of email, following services can come in very handy to serve your purpose: For all those times when you don’t really want to give out your email address to somebody but you really have to, these disposable email accounts can be very useful. 1. MakeMeTheKing is a disposable email service that has a nice interface. 2. Dodgit allows you to create a receive-only email address that automatically deletes all the messages after 7 days. 3. With MeltMail, you have more control of your disposable email account. For those times when you want to send an email at a later time, there are some very helpful email services that let you schedule your email delivery. 4. DeferredSender allows you to schedule emails from any email service or website. 5. 6. 7. noSPM: 8.
Spectrum Dashboard - Reboot.FCC.gov Home About Reboot Events Initiatives Reform FCC Leadership Blog FCC.gov/data Exploring America's Spectrum The Spectrum Dashboard allows new ways for citizens to search spectrum in the United States. Browse Spectrum Bands Learn more about the current spectrum distribution by browsing a chart of the spectrum bands, or by searching specific frequency ranges. API Resources for Developers Browse Using a Map Use an interactive map to find information on licensees in a particular county or state. Search by Name Search by "common name" (AT&T, Verizon, etc) to learn who holds spectrum licenses around the country. Advanced Search Search by name, radio service, frequency range, channel block, or call sign to learn who holds spectrum licenses around the country. FCC License View A single portal for information on the management of FCC licenses. Spectrum Dashboard Reports 1-click access to commonly requested data and popular reports. Feedback and Discussions Help Understanding Your Results Online Help Latest from the Blog
2 meters antennas - XE1BEF WEB PAGE Dotster Call Sales 800-401-5250 Hosting and Email Domains Website Services I Want To ... Start a Website Questions? Awards & Accreditations ICANN Accredited Registrarnameintelligence 2007 Users Choice AwardWebhost Directory Award Winner #1 In Shared HostingBest Budget Host Award by HostReview.com We Dot What You Want © 2016 Dotster.