Kinda scary, huh?
Showing posts with label technology. Show all posts
Showing posts with label technology. Show all posts
Saturday, April 24, 2010
Friday, April 9, 2010
The Future of Telecommunications Regulation
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The Future of Telecommunications Regulation
Professor of Finance and Economics
Pennsylvania State University
April 26, 1999
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In discussing the future of telecommunications regulations one needs to ask first, there is a future? Or is it just the same present and past repeating themselves, like in the movies, just like the Groundhog Day, where Bill Murray was condemned to live the same day again and again? It’s been over three years now since the Telecommunications Act of 1996. And yet, it seems like the old days, everywhere in new variants one looks, one meets dear old friends. There’s Interconnection, for example, and over there, good old RBOC IXC, looking as depressed as ever. And here is good old state jurisdiction. Among such truly companions, does one dare to speak of the future as anything but a continuation of the past?
http://www.citi.columbia.edu/elinoam/articles/Naruc9.htm
The Future of Telecommunications Regulation
Eli M. Noam
Professor of Finance and Economics
Pennsylvania State University
April 26, 1999
...
...
In discussing the future of telecommunications regulations one needs to ask first, there is a future? Or is it just the same present and past repeating themselves, like in the movies, just like the Groundhog Day, where Bill Murray was condemned to live the same day again and again? It’s been over three years now since the Telecommunications Act of 1996. And yet, it seems like the old days, everywhere in new variants one looks, one meets dear old friends. There’s Interconnection, for example, and over there, good old RBOC IXC, looking as depressed as ever. And here is good old state jurisdiction. Among such truly companions, does one dare to speak of the future as anything but a continuation of the past?
http://www.citi.columbia.edu/elinoam/articles/Naruc9.htm
Start-Stop Making Sense
Start-Stop Making Sense
http://pclt.cis.yale.edu/pclt/COMISDN/STRTSTOP.HTM
...from the good olde Win31, "This is the communications configuration panel from Windows Terminal. It raises a number of interesting questions. Why would someone use 5 bits per character? Because a 5-bit code was used by very early Teletype equipment that was already obsolete in the 1950's. What is the right number of Stop Bits? Well, if you have a Teletype Model 33, the right answer is 2. If you have a Teletype Model 35, the right answer is 1.5. However, no device built in the last 20 years has needed more than 1 stop bit. What is Xon/Xoff Flow Control? XON and XOFF are byte values. The Teletype had a device to read punched paper tape. The XON character turned the tape reader on, and the XOFF character turned it off. Long after the last paper tape was burned, computers have maintained the tradition that XOFF can optionally mean "stop sending data," in which case XON means "begin sending again." What is parity? Before modems did error correction, parity provided a simple mechanism to detect characters corrupted by phone line noise. Today it is unnecessary and is typically disabled.
So in current use, the correct setting for the COM port is always 8-bit characters, no parity, 1 stop bit, hardware pacing (more about that later) and some speed faster that the native transmission speed of the modem. The panel to configure the COM port is left around because everyone is scared to get rid of it. The user should not be scared when presented by a large package of useless options. "...
http://pclt.cis.yale.edu/pclt/COMISDN/STRTSTOP.HTM
...from the good olde Win31, "This is the communications configuration panel from Windows Terminal. It raises a number of interesting questions. Why would someone use 5 bits per character? Because a 5-bit code was used by very early Teletype equipment that was already obsolete in the 1950's. What is the right number of Stop Bits? Well, if you have a Teletype Model 33, the right answer is 2. If you have a Teletype Model 35, the right answer is 1.5. However, no device built in the last 20 years has needed more than 1 stop bit. What is Xon/Xoff Flow Control? XON and XOFF are byte values. The Teletype had a device to read punched paper tape. The XON character turned the tape reader on, and the XOFF character turned it off. Long after the last paper tape was burned, computers have maintained the tradition that XOFF can optionally mean "stop sending data," in which case XON means "begin sending again." What is parity? Before modems did error correction, parity provided a simple mechanism to detect characters corrupted by phone line noise. Today it is unnecessary and is typically disabled.
So in current use, the correct setting for the COM port is always 8-bit characters, no parity, 1 stop bit, hardware pacing (more about that later) and some speed faster that the native transmission speed of the modem. The panel to configure the COM port is left around because everyone is scared to get rid of it. The user should not be scared when presented by a large package of useless options. "...
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