The International Telecommunication Union sets the standards for many types of communication equipment including international frequency allocation. The standards are discussed and agreed to by all members of the ITU. These include equipment manufacturers, PTTs and regulatory bodies throughout the world.
For instance your modem will probably be using the V.90 standard which was a compromise between USRobotics and Rockwell proprietary standards.
If I am right the FCC will attend ITU meetings on frequency allocation to try and convince the committees that their standards should be recommended as international standards to the rest of the world.
However the ITU cannot enforce standards set throughout the world. It is up the members or the organization, like the FCC, to make certain that everyone follows what they agreed to at the ITU. If a member does not like a standard, or if it conflicts with some national standard they can easily ignore the international standard!
That is the reason why international standards of this type either all bow to the lowest common denominator or contain exceptions or numerous different versions which are all allowed under the standard to keep everyone happy.
Am I right in thinking that in theory a TCP connection could remain open indefinitely but that all TCP connections are limited to a maximum amount of data that they can transfer? Something to do with the fact that a byte count of fixed length is contained in each packet.
This makes the original question rather academic; You can leave a connection open as long as you want but you cannot send any data over it in case you go over the limit...
I remember going to the Telecom '87 exhibition in Geneva. Or was that the Telecom '91? Anyway, one of the 'wonderful new products' on show was a portrait 3D display which worked in a similar manner to this but it had lenses on the front of the screen to focus the pictures correctly for both eyes. It would only work if you sat in exactly the right spot so only one person could look at the screen at any time.
I remember them saying that the width of the screen determined the 'depth' of the image which you could display. Remember that you only have half the horizontal resolution of your screen available when working in 3D mode! So this portrait display could not display very large or distant objects well but what it could do was still amazing back then.
I got the impression that it has been technically possible to create 3D displays for some time but the computing power has only recently made it viable to start using such displays for things other than binocular video. How common is binocular video, even though it is technically possible and should be cheap?
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The International Telecommunication Union sets the standards for many types of communication equipment including international frequency allocation. The standards are discussed and agreed to by all members of the ITU. These include equipment manufacturers, PTTs and regulatory bodies throughout the world.
For instance your modem will probably be using the V.90 standard which was a compromise between USRobotics and Rockwell proprietary standards.
If I am right the FCC will attend ITU meetings on frequency allocation to try and convince the committees that their standards should be recommended as international standards to the rest of the world.
However the ITU cannot enforce standards set throughout the world. It is up the members or the organization, like the FCC, to make certain that everyone follows what they agreed to at the ITU. If a member does not like a standard, or if it conflicts with some national standard they can easily ignore the international standard!
That is the reason why international standards of this type either all bow to the lowest common denominator or contain exceptions or numerous different versions which are all allowed under the standard to keep everyone happy.
Am I right in thinking that in theory a TCP connection could remain open indefinitely but that all TCP connections are limited to a maximum amount of data that they can transfer? Something to do with the fact that a byte count of fixed length is contained in each packet.
This makes the original question rather academic; You can leave a connection open as long as you want but you cannot send any data over it in case you go over the limit...
I remember going to the Telecom '87 exhibition in Geneva. Or was that the Telecom '91? Anyway, one of the 'wonderful new products' on show was a portrait 3D display which worked in a similar manner to this but it had lenses on the front of the screen to focus the pictures correctly for both eyes. It would only work if you sat in exactly the right spot so only one person could look at the screen at any time.
I remember them saying that the width of the screen determined the 'depth' of the image which you could display. Remember that you only have half the horizontal resolution of your screen available when working in 3D mode! So this portrait display could not display very large or distant objects well but what it could do was still amazing back then.
I got the impression that it has been technically possible to create 3D displays for some time but the computing power has only recently made it viable to start using such displays for things other than binocular video. How common is binocular video, even though it is technically possible and should be cheap?