Author Archives: benfranske - Page 17

From the Trenches

One of the things I enjoy collecting are tech support calls where the user makes a complete fool out of themself. I’ve got an interesting and enlightening collection of those. Along the same lines are some of these real stories from tech support recently published in NetworkWorld.

“You have to have a good sense of humor to work at this,” says Jeff Whitmore, director of IT at guitar strings and accessories maker Ernie Ball of San Luis Obispo, Calif.

“My favorite request is from people wanting me to ‘Restart the Internet [because] it seems frozen,'” he says. “I’m going to quit the day I stop laughing at some of the things people think we should and can do.”

With users like this who needs TV comedy?

Old Apple Software

Apple Computer has a great web site with links to old drivers, software updates and even operating systems. Stretching back to the Apple II days and up to just before OS 8 this is quite the treasure trove for a vintage Macintosh collector such as myself. Heck, they even have updates for the ill-fated Newton PDA operating system should you be so lucky as to have one of those.

Songs about Phsyics

Sometimes what feels so right is so very wrong. Walter F. Smith Associate Professor of Physics at Haverford College has a website called PhysicsSongs.org. Naturally, the site features lyrics about physics set to your favorite tunes ranging from “Twinkle, Twinke, Little Star” to the “Macarena”. If you’re really a glutton for punishment you might check out the first ever physics song sing-a-long taking place at the March 15 annual meeting of the American Physical Society in Baltimore, MD. Oh, the website is very bright and reminiscent of those 1990s websites you just love to hate.

Distributing Bandwidth Costs

If you haven’t yet read Bob Cringely’s latest column you’ll find it to be an interesting vision for content distribution in the future. Diving right into the problem of bandwidth for video distribution over IP Bib comes to the conclusion that peer-to-peer technology will be the savior of the content holders in the end preventing them from needing to purchase obscene amounts of bandwidth.

Interestingly I came to the conclusion about a third of the way through the article that he explores further right towards the end. The way to encourage people to share their bandwidth via P2P is to pay them for it. Bob mentions “Peer Impact” which is a content company and software program that has currently adopted a model similar to this. I would take this one step further and say that there is a business model for some company to create a peer-to-peer network which pays each user on a per-megabyte of transfer they do for the network and then turns around and resells that bandwidth to content creators who need bandwidth. If you think about it this is a much more efficient system than the top-down system currently in place. It also solves one of the biggest problems with widespread BitTorrent, etc. systems which is that people leech from the system and then disconnect before returning their fair share of the bandwidth. If people were being paid to simply run a P2P client in the background, one which was agnostic about what was being transferred (eg. you would not have to intentionally download the content yourself first, it would all be automatic), you wouldn’t have a problem with people keeping the client open because they would see it as a moneymaking opportunity which costs them nothing. The ISPs will probably grumble at first but in the end they would come around because it saves them internet bandwidth if the content can move around within their network instead. What you’re really setting up in this scenario is a content distribution and caching system where people dedicate some of there hard drive towards caching content that is currently in demand and then sharing that content with other subscribers on the network. I think there’s a real business potential in this market so if you capitalize on this idea please remember where you got it.

One other issue Bob mentions is the distribution of live streaming content. He seems to see this as some sort of unresolved problem. While it’s true that most P2P systems don’t handle live content very well there is another solution. For years Cisco has been promoting IP Multicasting as a way to conserve a lot of bandwidth for live streaming broadcasts. Unfortunately, the technology is still not widely implemented. If the major backbone carriers and ISPs made a big push to support multicasting on all their routers content creators would only have to push one stream out to the internet where routers would distribute it globally. It’s really a well thought out solution but more people need to get on board. Strangely enough Cringely doesn’t even mention multicasting which leads me to believe this technology is still very much under the radar even though it has been used on some private networks for years.

Radio over VoIP

In a followup to an earlier article about the Cisco IPICS system I have received some additional information that seems to indicate my preliminary analysis was correct. If you remember when Cisco launched their IPICS ’emergency communications system’ I suggested it was really more of a way to tie existing communications systems together than a new system itself.

It seems that Cisco has been looking into this for a while and ostensibly created this product to fill an internal company need for connecting disparate communications systems. This case study explains how Cisco created a Land Mobile Radio (LMR) over IP product to fill a need to communicate with their own security personnel. The end product is described in this Cisco whitepaper entitled “Cisco Land Mobile Radio over IP Solution Reference Network Design”.

The LMR over IP product is a card which can be installed in any of the voice capable Cisco routers and provides an interface that connects full-duplex VoIP datastreams to speaker, mic, push-to-talk (PTT) half-duplex devices. Signaling is via standard H.323 and the card uses RTP audio with a variety of codecs. The card used is called a VIC Ear and Mic (E&M) interface and was originally used to connect VoIP to some legacy PBX hardware. Technical information about the E&M interface can be found in this technical publication. If your LMR equipment supports a half-duplex T1 that can be used as a trunk interface instead.

As a friend pointed out the existence of support for this type of configuration presents some interesting ideas for amateur radio VoIP projects. Without going into too much detail the current preferred methods of connecting amateur radio stations with VoIP is to use either the Echolink or IRLP project. Both of these have a significant number of problems, one of which is that they require a computer to be attached to the radio. It would be much nicer to attach a (more stable) router to the radio instead. This merits some more research. Once you got a radio attached to a VoIP phone system such as Asterisk there’s all kinds of interesting possibilities.

Rocket Man

If you haven’t heard about Juan Manuel Lozano perhaps you should. Lozano has devoted most of his life to building a personal jetpack at his home 50 miles south of Mexico City. Along the way he has invented and sold a distiller for 90% pure Hydrogen Peroxide (which he uses to fuel his jetpack) and a super efficient “Penta M” catalyst pack which converts the fuel into steam. He has no formal education beyond high school and only standard aerobatic pilot training. Popularized in the 1960s by Wendell Moore of the Bell Aerospace company the devices have been featured in everything from James Bond films to the 1984 Summer Olympics. Lozano has successfully completed a series of tethered test flights with his rocket pack and hopes to perfect and begin selling his design for $350,000 each. Considering that only 12 people have ever flown untethered rocket packs that’s no small feat. It’s also one that has earned Lozano and his company, Technologia Aerospacial Mexicana, a prime article by Larry Smith in the March 2006 Popular Mechanics magazine entitled “Ready for Takeoff?“. It’s a great article and I encourage you to read up on this amazing tinkerer and backyard rocket scientist.

A Real Scanner

While it’s prohibtively expensive to build the Equinox radio scanner probably represents the pinnacle of radio scanning equipment today. A fully remote controllable PC based radio (RF) scanner this is truly the Cadillac monitor.

From its home in the Seattle, Washington area, the Equinox receiver provides continuous, remotely-accessible coverage of the DC-1 GHz spectrum on a 24-hour basis.

While it would be a bit much for individual hobbiests to build one of these it would be cool to see scanning clubs such as Minnesota based ScanFan get together and buid one for community use. The internet provides a great way of participating in this increasingly expensive hobby (as more systems go digital) if we could allow for some remote control and data from the reciever(s).

Controversial Internet Humor

If you’re not upset with raw language and enjoy quirky internet humor be sure to check out “The Best Page In The Universe“. This website run by self-congratulatory webmaster George Ouzounian (Maddox) is full of satire bound to upset and offend just about everyone. At least he offers equal opportunity offense. Originating from a 1997 list of 50 things he hates the site has grown to include such diatribes as “The most expensive $94 Orbitz will ever make” or “Star Wars Episode III: a steaming pile of Sith”.

The site is so popular it has spawned a fan page, aptly named “The Second Best Page In The Universe“, a Mothers Against Maddox hate site and even a Wikipedia entry. Controversy surrounding the site has led to it being blocked by several countries and the Websense filtering program. Of course Maddox takes this all in stride. A true internet ledgend. Now, if only I could find a folk song about Maddox and his site.

Photography in Minnesota

The Minnesota Center for Photography is the “leading center for photography in the upper Midwest” and regularly showcases photographic exhibits. They have recently re-launched their website and hope to start offering members access to darkrooms at their Minneapolis location later this winter. In addition, members have the ability to display their work in rotating “spotlight exhibitions” and can access a library of photography related information.

Open Source City

LinCity looks like a great Linux clone of the traditional Maxis game, SimCity. Now in an updated form LinCity-NG now has an isometric 3D view similar to that found in SimCity 2000, arguably the best version of the classic game.