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Wishing a safe and happy weekend for all readers of The Wireless Messaging News. Nostalgia I have been actively involved in radio communications for over 60 years. It was in April when I got my first FCC license—59 years ago. So this has been my life-long passion. The most-interesting technology that I have worked with—and learned about—has been Paging Simulcast Transmission. Over in Europe, they call it Quasi-Synchronous Transmission, but that's another story. Simulcasting is one of the main advantages that Paging has over other types of wireless communications. It is not a simple solution to wide-area paging, but it really works great when properly implemented. Over the years I have found that a lot of engineers, and technicians, (including me) didn't really understand the fine-points of this technology. So I have continued to learn. I have collected all the definitive information that I could find about Simulcasting, and have included it in the Reference Library of the Paging Information Resource. There are many articles there touching on Simulcasting, so to simplify things a little, here is a short list of the main ones by people who really know what they are talking about.
So Simulcast Transmission in Paging is simply sending out digital messages (numeric or alphanumeric) at the same time from multiple transmitters in overlapping coverage areas. The problem is, that if not done correctly, the messages can cancel each other, or at least cause corruption. On the surface, the solution is simple:
So then frequency, time, and amplitude have to be accurately controlled. This is made possible by the GPS system.
How GPS WorksA Big ProblemThe Motorola Nucleus II Paging Base Station is a great paging transmitter. The Nucleus I, however, had some problems. One of the best features of this product was its modular construction. Most of the Nucleus' component parts were in plug-in modules that were field replaceable making maintenance much easier. One issue was (and still is) that two of the modules had to always be kept together. They are called the “matched pair.”
Motorola used some tricks to keep people in the field from trying to match unmatched pairs, and force them to send SCM and Exciter modules back to the factory for calibrating them with precision laboratory equipment. The serial numbers have to match in the Nucleus programing software or you can't transmit. Specifically the 4-level alignment ID parameter contained in the SCM has to match the Exciter ID parameter. Even if someone could modify the programing software to “fudge” these parameters, that would not let them use unmatched modules effectively without recalibrating them to exact factory specifications. Please let me know if you can help. [click here] Please check out the updated listing of Paging Infrastructure Equipment in this issue from Preferred Wireless. Can You Help?Looking for a source of the following parts:
If you can, please let me know where these can be obtained. [ click here ] Now on to more news and views. | Wayne County, Illinois
A new issue of the Wireless Messaging Newsletter is posted on the web each week. A notification goes out by e-mail to subscribers on most Fridays around noon central US time. The notification message has a link to the actual newsletter on the web. That way it doesn’t fill up your incoming e-mail account. There is no charge for subscription and there are no membership restrictions. Readers are a very select group of wireless industry professionals, and include the senior managers of many of the world’s major Paging and Wireless Messaging companies. There is an even mix of operations managers, marketing people, and engineers — so I try to include items of interest to all three groups. It’s all about staying up-to-date with business trends and technology. I regularly get readers’ comments, so this newsletter has become a community forum for the Paging, and Wireless Messaging communities. You are welcome to contribute your ideas and opinions. Unless otherwise requested, all correspondence addressed to me is subject to publication in the newsletter and on my web site. I am very careful to protect the anonymity of those who request it. I spend the whole week searching the Internet for news that I think may be of interest to you — so you won’t have to. This newsletter is an aggregator — a service that aggregates news from other news sources. You can help our community by sharing any interesting news that you find.
Editorial Opinion pieces present only the opinions of the author. They do not necessarily reflect the views of any of advertisers or supporters. This newsletter is independent of any trade association. Subscribe IT'S FREE * required field If you would like to subscribe to the newsletter just fill in the blanks in the form above, and then click on the “Subscribe” button. There is no charge for subscription and there are no membership restrictions. It’s all about staying up-to-date with business trends and technology. Back To Paging
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BlackBerry DTEK50 review: Cheap, secure and better than expectedThat still doesn't mean it's for everyone. By Chris Velazco
Hardware See video here . If you're reading this, there's a good chance you already know BlackBerry didn't design the DTEK50 by itself. Instead, the company chose a reference design from TCL — the folks behind the Alcatel brand — that offered the level of performance it was after. That decision was... divisive, to say the least. CEO John Chen has long said that BlackBerry would stay in the hardware game as long as there was money in it , and by customizing an existing design, the company just saved heaps of money on product development. The flipside is that the finished device doesn't really feel like a BlackBerry. I'll be the first to admit that sounds a little silly, but still, I was a little worried when I first heard the news. BlackBerry has historically taken pride in designing its devices, from pint-size beauties like the Pearl series to last year's delightfully bonkers Priv. Pulling an existing design off a shelf and adding BlackBerry accents like a logo and a textured rubber back didn't sit right with me at first, even though the company maintains it's a pretty common practice. Ultimately, though, it's safe to say that these concerns only really matter to mobile wonks like me. Once I got down from my high horse, I was met with a device that's respectably well built and even sort of handsome (in an understated sort of way). The company also says the DTEK50 is the thinnest BlackBerry ever, which helps explain the mediocre 2,610mAh battery squeezed in there. I'll dig into that a little later; for now, just know that the DTEK50 manages to be very light without ever feeling cheap. Nice work, TCL. Gallery: BlackBerry DTEK50 review | 29 Photos Unlike last year's premium Priv, we're working with a midrange list of specifications: an octa-core Snapdragon 617 chipset with 3GB of RAM and an Adreno 405 GPU. Alas, there's no physical keyboard this time; you'll be typing your messages on a 5.2-inch, 1080p IPS LCD touchscreen. Flanking the display is a surprisingly capable pair of stereo speakers, an 8-megapixel front-facing camera and a notification LED up top. But don't get too excited, BlackBerry loyalists: It only blinks white. Meanwhile, the DTEK50's backside is home to a 13-megapixel camera (with phase-detection autofocus, no less) and a two-tone LED flash. For a phone that's so focused on security, it's a little odd that the DTEK50 doesn't have a fingerprint scanner. The reason is purely practical: BlackBerry had to keep costs down. That's probably also why the DTEK50 comes with only 16GB of internal storage. (Thankfully, you can add up to 2TB of storage by way of a microSD card slot.) What we got instead of said scanner is a convenience key that sits below the volume rocker on the phone's right edge. The premise is simple, enough: You can set it to launch apps or perform specific actions like calling someone or turning on the flashlight. Alas, the convenience key isn't always very convenient. It won't work while the phone is locked — something its distant relative, the Idol 4S, does just fine — and you can't use it to snap a quick photo or take screenshots. More important, that key sits where most phones have their power buttons, and it took me an entire week to get used to that tricky placement. (If you'd rather not reset your muscle memory, you can make the convenience key unlock the phone too Display and sound
The Priv's fancy, curved AMOLED panel obviously wasn't going to make the jump into a midrange phone, but — surprise, surprise — the 5.2-inch LCD we got on the DTEK50 is pretty damned good. It runs at 1080p (that's a pixel density of 424 ppi, if you didn't feel like doing the math), making for plenty of crisp text and visuals. It lacks the sort of punchy colors and deep blacks we got from the Priv, but who cares? They're accurate, and the screen and scratch-resistant glass covering it are laminated together, so viewing angles are great. (If the color temperature doesn't do it for you out of the box, you can tweak it in the device's settings.) In fact, the only time the DTEK50's display seems to fall short is when you look at it next to other devices that cost about the same. ZTE's Axon 7 will cost only $100 more when it launches in the US in September, and it features a beautiful Quad HD screen. Would it have been nice to get a higher-res screen on the DTEK50? Sure. Would it have made any sense, considering BlackBerry is trying to sell these en masse to businesses? Not even a little.
The audio quality another pleasant surprise, given that BlackBerry has never paid much attention to it in the past. I always feel a little twinge of giddiness when a phone I'm reviewing has stereo speakers, and the DTEK50's offer crisp highs and decent channel separation for immersive sound. Even better, the speaker setup is replicated on the phone's back so the jams won't stop even when the DTEK50 is lying face down. Still, they're far from perfect: Most songs I tried sounded hollow. What's more, the DTEK's maximum volume isn't terribly loud, though it'll do fine for podcasts and YouTube videos. The DTEK50 also comes with Waves' MaxxAudio tuner, but your mileage may vary. The app's presets usually succeeded in making my songs sound different, but not necessarily better Software and security
Now that the company is willing to almost completely outsource hardware design and production, BlackBerry's soul boils down to two things: software and security. Unless it nails both of those things, then, there's little reason to buy into the company's vision. As far as the former goes, there's no point in hiding it: I dig BlackBerry's take. Things haven't changed dramatically since the Priv's days -- the company didn't mess with Android 6.0.1 itself. Most of the same tricks are back and they still focus on getting things done fast. Swiping up from the bottom of the screen, for instance, brings up shortcuts to the dialer, the Device Search app and BlackBerry's Hub. Long story short, the hub acts as a one-stop shop for your messages, be they emails, BBMs, texts, Facebook messages or Viber pings. I typically prefer the rush of pseudo-productivity that comes with jumping in and out of multiple apps, but it didn't take long to appreciate having a single place to triage all the stuff that flew into my inbox. (As a bonus, you can now download this app from the Play Store and use it on other Android devices too.) Gallery: BlackBerry DTEK50 software tour | 22 Photos Meanwhile, peer closely enough at the screen and you'll see the edge of a tab all the way on the right. Swiping on that opens the Productivity tab, where you'll find a rundown of the day's calendar events, unread messages, tasks that need completing and favorite contacts (you know, just because). Just like Samsung's Edge UX, it's easy to forget the feature even exists, but it's handy when you do remember it's there. If that wasn't enough swiping, you can view an app's widgets in a pop-up window (as opposed to finding room for them on your home screens) by swiping up on them. It's a neat touch that gives you extra context without having to fully open the app, but I never really use widgets in the first place. That swiping continues when you use BlackBerry's software keyboard. Fan that I am of Google's in-house keyboard, I love what BlackBerry has come up with: It's perfectly sized, it's precise and swiping up on word suggestions to complete messages is actually pretty fun. It's easily one of the finest keyboards available on an Android phone, which is only natural considering the company that made it. Curiously, though, one of the BlackBerry's neatest software touches didn't make the leap here: You can no longer set a Picture Password, which is puzzling because it worked fine on the Priv.
Obviously, the DTEK50's biggest selling point is security, and I haven't dwelled on it until now is because it's almost completely invisible to the person using the phone. You can't tell that a hardware root of trust was baked into the phone during manufacturing, just like you can't tell the phone is fully encrypted by default. The only real reminder that the DTEK50 is more locked down than most is the namesake DTEK app, which offers an at-a-glance look at how secure the phone is. But here's the rub: DTEK is what you make of it. You'll get a rating and a checklist of things that are or aren't going well on the phone upon launch, but after you take basic precautions like setting up a PIN, the app mostly just says everything is excellent. It's when you dig a little further that DTEK's value really becomes apparent — it outlines which apps have access to certain parts of the phone and counts up how many times those apps try to gain access. As of this writing, for instance, Facebook Messenger has tapped into my device's contacts nearly 500 times. In certain cases, you can even see where you were when an app tried to gain access. More important, permissions can easily be revoked and apps can be quickly uninstalled from within DTEK, making it yet another one-stop shop for functions that would normally be buried in settings menus. Camera
I wasn't expecting much from the DTEK50's 13-megapixel camera. After all, BlackBerry hasn't had the best track record with imaging performance, and on at least one occasion it didn't bother with a camera at all . It turns out that fretting was for nothing: The DTEK50 won't win any photography awards, but both its main and front-facing cameras were respectable performers. That main sensor around back has a f/2.0 aperture lens and a phase-detection autofocus system; too bad it lacks the optical image-stabilization offered on last year's Priv. Even so, my photos contained plenty of detail, with nicely balanced colors in good lighting conditions. Don't expect too much from the DTEK50 in low light; you'll see grain and soft edges everywhere (even after the phone applies it multiframe low-light enhancements). I really shouldn't have been surprised at the DTEK50's performance here — midrange phones have become more impressive on all fronts, cameras included. That said, I still preferred the photos I took with the similarly priced Moto G4 Plus, which packs a 16-megapixel sensor and an additional laser auto-focus module. Gallery: BlackBerry DTEK50 camera samples | 20 Photos BlackBerry still gets some credit for piecing together a good camera app, though. A shutter button lives on the right edge of the screen, with a handy exposure slider, mode selector and a panel of photo filter effects nearby for easy access. More serious photographers will get some mileage out of the included manual mode, which allows for finer control over focus, white balance, shutter speed, exposure compensation and ISO. It's not the most polished camera app, but it's enough to get the job done. Performance and battery life
This is where things start to get hairy. The octa-core Snapdragon 617 (with four 1.5GHz cores and four 1.2GHz cores) is a well-known chipset at this point and has landed starring roles in phones like the fourth-generation Moto G line and the HTC One A9 . For the most part, that combination of CPU cores and 3GB of RAM keep the DTEK50 running without issue. It's certainly not flagship level, but launching apps, multitasking and generally just getting things done generally aren't a problem. Graphically intense games sometimes threw the DTEK50 for a bit of a loop, but I could usually log plenty of time in Asphalt 8 with the visual settings cranked up before noticing any slowdown. Once in a while, though, the phone would start to stutter, even during pretty basic tasks, before eventually returning to normal. I didn't see hiccups this frequently while playing with other 617-powered devices, though that's not to say they were immune to the occasional slowdown. I could usually clear things up by closing all running apps, and I suspect at least sometimes the problem was caused by using the DTEK50 out in the summer heat. Thankfully, these issues didn't crop up every day, and with any luck a post-launch software patch will help smooth things out a bit.
The battery, meanwhile, has been awfully hit-or-miss. BlackBerry and TCL fitted the phone with a 2,610mAh non-removable cell that typically saw me through a full workday and then some before giving up the ghost. That's about 14 hours of pretty consistent, mixed use — my days involve lots of phone calls, emails, Slack messages and card-slinging in Hearthstone , for the record. That's in line with what we've seen from other midrange phones, which makes the DTEK50's lackluster performance in our standard video rundown test so surprising. The phone looped a 720p video with screen brightness set to 50 percent and WiFi connected for just under eight hours, putting it well below the LG G5 (with a similar size battery) and either of this year's new Moto Gs. In fairness, that's not exactly a natural use case — I don't know many people who'd watch videos on their phones for eight hours straight — but it's still sort of a let-down. The competition
BlackBerry clearly wants to sell tons of DTEK50s to businesses, and among corporate buyers, the company's storied brand and devotion to security might give the phone an edge. The thing is, BlackBerry is trying to sell these to regular people too, and on that front, the DTEK50 faces a much tougher fight. Consider this year's Moto G Plus, an enhanced version of the fourth-generation Moto G that launched alongside it. For $299, you'll get a phone with the same Snapdragon chipset as the DTEK50 but with more RAM (4GB), more storage out of the box (64GB), a better camera (16 megapixels), a fingerprint sensor and an almost-stock version of Android. Motorola's tight focus has wavered a bit -- there are more Moto models now than ever — but the brand can still put out an excellent cheap phone. The problem is, you could do so much better if you'd be willing to spend just a little more cash. ZTE's Axon 7 and the OnePlus 3 can be had for as little as $399, and they offer full-on flagship performance in impeccably built bodies. None of these options offer the same level of hardened security as the DTEK50, but if you're dead-set on a BlackBerry, you could find a Priv online for around $300. It might be a little older, but the Snapdragon 808 chip inside it is still no slouch, and you'll get a great physical keyboard, to boot. Wrap-up
It's been more than a week, and it's still hard to judge the DTEK50. As a ploy to appeal to those crucial business customers, it's brilliant. For them, the DTEK50 is a solid, not-very-expensive option with the security chops to put IT paranoiacs at ease. As a phone for regular people, though, the DTEK50 is a much a tougher sell. Make no mistake: The DTEK50 is a perfectly good handset, and I'll always appreciate BlackBerry for trying to keep security in the front of people's minds. Still, it takes more than that to make a smartphone great, and BlackBerry's approach won't be for everyone. Unless you're a BlackBerry loyalist or you take your security very, very seriously, you're better off setting your sights elsewhere.
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| Source: | engadget |
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| Swissphone |
Disaster-Proven Paging for Public SafetyPaging system designs in the United States typically use a voice radio-style infrastructure. These systems are primarily designed for outdoor mobile coverage with modest indoor coverage. Before Narrowbanding, coverage wasn’t good, but what they have now is not acceptable! The high power, high tower approach also makes the system vulnerable. If one base station fails, a large area loses their paging service immediately! Almost every technology went from analog to digital except fire paging. So it’s time to think about digital paging! The Disaster-Proven Paging Solution (DiCal) from Swissphone offers improved coverage, higher reliability and flexibility beyond anything that traditional analog or digital paging systems can provide. Swissphone is the No. 1 supplier for digital paging solutions worldwide. The Swiss company has built paging networks for public safety organizations all over the world. Swissphone has more than 1 million pagers in the field running for years and years due to their renowned high quality. DiCal is the digital paging system developed and manufactured by Swissphone. It is designed to meet the specific needs of public safety organizations. Fire and EMS rely on these types of networks to improve incident response time. DiCal systems are designed and engineered to provide maximum indoor paging coverage across an entire county. In a disaster situation, when one or several connections in a simulcast solution are disrupted or interrupted, the radio network automatically switches to fall back operating mode. Full functionality is preserved at all times. This new system is the next level of what we know as “Simulcast Paging” here in the U.S.
Swissphone offers high-quality pagers, very robust and waterproof. Swissphone offers the best sensitivity in the industry, and battery autonomy of up to three months. First responder may choose between a smart s.QUAD pager, which is able to connect with a smartphone and the Hurricane DUO pager, the only digital pager who offers text-to-voice functionality. Bluetooth technology makes it possible to connect the s.QUAD with a compatible smartphone, and ultimately with various s.ONE software solutions from Swissphone. Thanks to Bluetooth pairing, the s.QUAD combines the reliability of an independent paging system with the benefits of commercial cellular network. Dispatched team members can respond back to the call, directly from the pager. The alert message is sent to the pager via paging and cellular at the same time. This hybrid solution makes the alert faster and more secure. Paging ensures alerting even if the commercial network fails or is overloaded. Swissphone sets new standards in paging: Paging Network
Pager
Dispatching:
Swissphone provides a proven solution at an affordable cost. Do you want to learn more? |
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Amateur Radio Sleuthing Pins Down Source of Strange RF InterferenceAugust 11, 2016 Police in Evanston, Illinois, contacted the ARRL Lab, after an apparent interference source began plaguing wireless vehicle key fobs, cell phones, and other wireless electronics. Key fob owners found they could not open or start their vehicles remotely until their vehicles were towed at least a block away, nor were they able to call for help on their cell phones when problems occurred. The police turned to ARRL for help after striking out with the FCC, which told them it considered key fob malfunctions a problem for automakers, although the interference was affecting not just key fobs but cell phones — a licensed radio service. ARRL Lab EMC Specialist Mike Gruber, W1MG, feels the FCC should have paid more attention. "This situation is indicative of what can happen as a result of insufficient FCC enforcement, especially with regard to electrical noise and noncompliant consumer devices," Gruber said.
Evanston authorities worried that a serious situation could develop if someone were unable to call 911, putting public safety at risk. They also were concerned that the RFI could be intentional and indicate some nefarious or illegal activity. Given the seriousness of this situation, Gruber contacted Central Division Director Kermit Carlson, W9XA, to ask if he could look into the matter. On June 2, Carlson met with an Evanston police officer, her sergeant, a local business owner, and the local alderman, and he quickly confirmed that the 600 block of Dempster Avenue in Evanston was plagued with an odd RFI problem. Carlson determined that the problem prevailed along a set of eight on-street parallel parking spots in the downtown commercial district of the North Chicago suburb. Carlson employed a Radar Engineers 240A Noise Signature Receiver and UHF Yagi antenna to survey the affected block. Since key fobs typically operate at around 315 MHz and 433 MHz, he looked on both frequencies. The survey identified several noise sources in the affected block, but in particular a strong signal in the middle of the block. The interference source turned out to be a recently replaced neon sign switching-mode power supply, which was generating a substantial signal within the on-street parking area just across the sidewalk, between 8 and 40 feet from the sign.
The problematic power supply interference also disabled Carlson's cell phone when he was within a few feet of the device. Carlson anticipated that further investigation would show that the harmful interference could disrupt licensed radio services in close proximity. The troublesome transformer was not replaced, but the building owner agreed to turn off the sign should problems arise. Carlson called the Evanston case "a particularly alarming example of radio interference," especially since local authorities considered it a public safety matter. "This situation demonstrates the electromagnetic compatibility problems that are evolving in an atmosphere of noncompliant, unintentional RF-emitting devices," he said. A return visit to the area with calibrated antennas and equipment capable of measuring the radiated signal strength with quasi-peak detection is planned for later this year. Since the initial visit, several other instances of unexplained key fob malfunctions have been reported in the Greater Chicago area. — Thanks to Kermit Carlson, W9XA, and Mike Gruber, W1MG |
| Source: | ARRL Letter |
Wireless Communication Solutions USB Paging Encoder
Paging Data Receiver (PDR)
Other products Please see our web site for other products including Internet Messaging Gateways, Unified Messaging Servers, test equipment, and Paging Terminals.
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| BloostonLaw Newsletter |
Selected portions of the BloostonLaw Telecom Update, and/or the BloostonLaw Private Users Update — newsletters from the Law Offices of Blooston, Mordkofsky, Dickens, Duffy & Prendergast, LLP — are reproduced in this section with the firm’s permission.
The BloostonLaw Telecom Update newsletter will be on our traditional August recess, in light of the usual slowdown in the news cycle at this time of year. We will resume publication on September 7. Meanwhile, we will keep clients apprised of significant developments via memos and special supplements. |
| This newsletter is not intended to provide legal advice. Those interested in more information should contact the firm. For additional information, please contact Hal Mordkofsky at 202-828-5520 or halmor@bloostonlaw.com . |
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| THOUGHT FOR THE WEEK |
Michael Phelps One of the 40 million copies sold of The Purpose Driven Life ended up in the large, paddle-like hands of Michael Phelps. In between winning Olympic golds, Phelps made headlines for very different reasons: repeated DUIs, parties and pot, weight gain and rehab. A couple of years ago, fellow athlete and friend Ray Lewis (aka “God’s linebacker”) gave the champion swimmer Rick Warren’s bestseller. “I basically told him, ‘Okay, everything has a purpose, and now, guess what? It’s time to wake up,’” the former Baltimore Raven said in The Washington Post. In an ESPN special, Phelps said the book “turned me into believing that there is a power greater than myself and there is a purpose for me on this planet” and “helped me when I was in a place that I needed the most help.” It spurred him to reconcile with his dad. |
| Source: | Christianity Today |
| PHOTO OF THE WEEK |
Michael Phelps
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| Source: | USA TODAY | Rob Schumacher, USA TODAY Sports |
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