More Telephone History (1878-1918)

A couple of weeks ago I pulled a piece out of a book I wrote about ten years ago titled Introduction to Telecommunications Networks. In that post I described the first year in the development of telephone technology. As a follow-up to that post, here's some of the major technical breakthroughs that happened between 1878 and 1918.

1878
Bell sets up the first operator switching exchange and at the same time, Western Union Telegraph Company (http://www.westernunion.com) decided to use its existing national telegraph wire network to set up its own telephone company. Bell quickly sued Western Union and Western Union settled out of court, selling its network to Bell.

Henry Hummings in England gets a British patent for a variable resistance telephone transmitter that used finely ground carbon. The carbon transmitter solved many of the early problems Bell had trying to use liquid and electromagnetic transmitters. The carbon transmitter also used a voice cone attached to a diaphragm.

The diaphragm, which was attached to a conductor, vibrated with sound waves and caused the closed container of ground carbon to compress and uncompress changing resistance in the same way the liquid transmitters did.

1885
American Telephone and Telegraph Company (http://www.att.com) was formed to provide long distance telephone service, connecting small Bell regional telephone franchises.

AT&T buys Henry Hummings’ ground carbon variable resistance telephone transmitter patent rights.

1886
Thomas Edison modified Henry Hummings’ finely ground carbon transmitter by using larger carbon granules. The larger granules created more current paths with sound wave compression and therefore allowed more current to flow in conjunction with the compression. The larger granules also did not pack as tightly over time like the finely ground carbon in Hummings’ transmitter. When they did pack, usually lightly hitting the transmitter on a hard surface would loosen them up.

1899
AT&T reorganizes, assuming the business and property of American Bell and becomes the parent company of the Bell System.

1908
Siemens (http://www.siemens.com) first tests dialtone on the public switched telephone network in a German city.

1918
AT&T patents an anti-sidetone solution for telephone receiver and transmitters. This technology allowed talkers to more easily adjust their voice volume when speaking into the telephone transmitter.

I'll continue with more history in a later post.

The First Year Of The Telephone

About ten years ago I wrote a book titled Introduction to Telecommunications Networks. About half the book described how the now rapidly disappearing public switched telephone network (PSTN) worked. I haven't picked up the book in a while but a recent flip through has certainly brought back some memories. I thought it would be interesting to take a look at some of the history. Here's how it all started.

1876
Alexander Graham Bell and Elisha Gray, another inventor competing with Bell, are both scrambling to get their voice transmission inventions patented.
 
February 14, 1876
On this day Alexander Graham Bell’s father in law, attorney Gardiner Hubbard, delivered a patent application from Bell to the U.S. Patent for a device that transmits voice frequencies across wires.

Approximately three hours later on the same day Elisha Gray filed a caveat (a formal notice of an invention Gray hoped to patent) with the U.S. Patent Office describing a device that also transmitted voice frequencies across wires.

March 10, 1876
Alexander Graham Bell and Thomas A. Watson demonstrate a working telephone system but not without controversy. When Bell’s original patent and Gray’s caveat, both filed on February 14, were reviewed it was determined the device Bell described would not have worked while Gray’s would have. It was speculated that Bell had copied parts of Gray’s design. In Gray’s caveat he had detailed the use of a variable resistance transmitter which was used to produce a transmitter signal robust enough for the receiver to hear. Bell had been struggling to solve this same problem. In Bell’s patent application he made what appeared to be a last minute handwritten notation about the use of a variable resistance transmitter. People speculated that Bell had found out about Gray’s caveat and learned of Gray’s use of a variable resistance transmitter and, at the last minute before filing, Bell made a note on the patent application about using the new transmitter.

The variable resistance transmitter demonstrated by Bell on March 10, 1876 used a voice cone attached to a diaphragm. Also attached to the diaphragm was a wire that was emersed in a metal container of acidic solution.

The user talked into the voice cone, voice sound waves caused the diaphragm to vibrate and the wire moved up and down in the acidic solution. As the wire moved up and down in the solution the resistance between the wire and the metal container changed causing the DC current to vary in proportion to the variation in sound waves.

The controversy between Bell and Gray lead to years of litigation to the level of the United States Supreme Court where a split decision gave Bell the patent for the telephone entitled Improvements in Telegraphy.

It took a little over a year for Bell to acquire and convince his wealthy father-in-law, Gardinar Hubbard, to finance the Bell Telephone Company and fund the building of the voice network infrastructure.

It's interesting to look back at the legal back and forth between Bell and Gray. It reminds me a lot of what we're seeing between Mark Zuckerberg and Facebook, the Winklevoss Twins, Wayne Chang,  Paul Ceglia.... and others.

The Antique On My Desk

Well..... maybe it is not an antique but it sure feels like it sometimes. It's a beige Nortel Meridian M2616 telephone manufactured in 1999. It's multi-line with a built in speaker phone and has a small optional LCD display that shows some basic information (date, time, caller ID, time on call, etc). It's got 16 programmable keys that can be expanded to 60 with something called a key expansion module.

Do I use it? Occasionally. It's actually got a very nice handset with great sound quality.  When I've got long calls scheduled it is much more physically comfortable and easier on my ears than my cell phone. It's also nice for conference calls. I don't use any of the programmable keys. What does it lack? Lots of features I've come to depend on from services like Google Voice or Skype, including:

• Voice messages going directly to my email inbox.
• Voice message transcriptions - which are searchable.
• Sharing voice messages via email.
• Being able to archive and backup a voice message as an audio file and save it in a folder.
• Blocking specific callers.
• One number for all of my phones and number porting. For example, I can make my mobile number my Google Voice number.
• The ability to use my computer as my phone any where, any place, any time.

I can't do any of these with my desk phone but can do all of them using an Internet connection and my MacBook Air or any other connected computer. In my Microsoft/Skype post yesterday I questioned why we still have both a computer and phone (separate independent devices) on most of our desks. Still wondering. Desk phones sure look like antiquated voice only devices.

Green IT: The Next Big Thing

Wikipedia defines Green Computing as the study and practice of using computing resources efficiently. Modern IT systems rely upon a complicated mix of people, networks and hardware; as such, a green computing initiative must be systemic in nature, and address increasingly sophisticated problems. Elements of such as solution may comprise items such as end user satisfaction, management restructuring, regulatory compliance, disposal of electronic waste, telecommuting, virtualization of server resources, energy use, thin client solutions, and return on investment (ROI).

On Friday (November 14, 2008) I attended a Green IT (Information Technology) Summit in Plano, Texas. The Summit was held as part of the North Texas Regional Community College Technology Forum and was hosted by Collin College and the National Science Foundation funded Convergence Technology Center (CTC). The CTC is headquartered at Collin College in Frisco, Texas and has worked since 2004 to meet the growing regional need for skilled specialists in the area of convergence technology. The Center has done considerable work in the areas of curriculum development, professional development for high school and community college faculty, outreach to under-served populations, and mentoring colleges in the rapidly developing convergence technology field.

The CTC is currently expanding on this work to include “Green IT" and is developing online/hybrid curriculum, methods for under-represented polulation recruitment and retention, and the scaling of a Mentored College program to broaden the dissemination of convergence related degrees and certificates to an increased number of colleges around the country.

CTCpartners include El Centro College (El Centro), Dallas County Community College District; and the University of North Texas, Denton. In addition to its partners, the CTC is mentoring City College of San Francisco (CA), Orange Coast College (CA), Guilford Technical Community College (NC), Ohlone College (CA), Santa Ana College (CA) and Fox Valley Technical College (WI). Mentoring work has included:

• Helping to build and refine advisory councils
  
• Validating IT and IT related regional skills
  
• Creating certificates and degrees using CTC defined curriculum as basis for new courses, and
  
• Creating and implementing CT certificates
  

The Green IT Summit included a panel of IT industry executives discussing what Green IT is, what the workforce needs are and why it is so important. Technical sessions were focused on delivering distance education using new tools (Second Life, You Tube, Podcasting and other Web 2.0 based technologies) that our younger digital native students expect to find in modern classrooms.

EDS Fellow Charles E. Bess gave an excellent presentation at the conference titled The Greening of IT. Charles discussed where he and other EDS Fellows see Green IT going. To give you a taste - here's a piece from a seven part Green IT series on the EDS Next Big Thing Blog:

Economics are starting to play a major role, with the soaring costs of energy, penalties for e-waste, carbon credit trading and fiscal reporting moving these items on to the board agendas. Societal and environmental concerns are getting more media attention, and consumers are "voting with their wallets" to pay premiums for green products and
services. Political and legal issues are driving politicians and regulators to enact legislation to cap greenhouse gas emissions and set standards for IT equipment. Technology is also driving the demand for more and more information accessible through an exploding number of end user devices which creates increased demand for direct and indirect (e.g. battery chargers) energy consumption.

This past year I've had the opportunity to visit a number of colleges and have been encouraged by the numbers of science and math focused students that are interested specifically in Environmental Technology and Engineering. When I ask these students why they are so interested the answer (it's obvious if you have had the chance to talk with a high school student recently) is commonly centered around their desire to "fix" things like global warming, energy consumption and pollution. Green IT has not hit most of their radar screens yet but it will.

If you are at an academic institution looking to re-invigorate your IT and IT related programs, Green IT is something you should consider. The Convergence Technology Center is currently accepting applications from institutions that wish to become a mentored college. Ann Beheler, Helen Sullivan and Ann Blackman are doing excellent work and this is a great way to get started. You can get more information on the mentor program by clicking here.

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You can see pictures I took at the Green IT Summit last Friday on my flickr page.

A Conversation with Pierre Thiry and James Jones from MPICT

The Mid-Pacific Information and Communications Technologies (MPICT) Center is a recently funded National Science Foundation (NSF) – Advanced Technological Education (ATE) Regional Center hosted by City College of San Francisco (CCSF). MPICT's mission is to coordinate, promote and improve the quality and availability of ICT education in a region consisting of Northern California, Northern Nevada, Southern Oregon, Hawaii and the Pacific Territories. Current Regional Partners include: Ohlone College , Santa Rosa Junior College , Cabrillo College and Foothill College.

We've had a great relationship with Pierre, James and CCSF and were fortunate to get them on camera to talk about MPICT at the 2008 SAME-TEC Conference.

MPICT is off to a great start under the leadership and direction of Pierre and James. Contact them for more information at www.mpict.org

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We have several interviews from SAME-TEC posted and you can get them different ways:

YouTube: Watch our YouTube Channel at: http://www.youtube.com/user/NatCtrTelecomTech

Streaming and Downloading: View streaming videos and download content using your web browser at: http://nctt.org/podcast

iTunes: If you have iTunes installed you can watch and listen to this one, watch and listen to others, and subscribe to our video and audio podcasts by following this link.

We're planning and looking forward to next years conference. Watch here, our center websites and SAME-TEC.ORG for 2009 Conference information and updates.