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Topic: Running typical cinema programs on Vista
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Stephen Furley
Film God
Posts: 3059
From: Coulsdon, Croydon, England
Registered: May 2002
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posted 01-23-2008 12:50 PM
quote: Ken Lackner RS232 ports started disapearing years ago. Probably because there haven't been any (at least not many) consumer devices that use it any more. Everything has gone to USB. I have heard of issues with USB-to-serial adapters. For my RS232 needs, I use a serial I/O PC card made by Socket and have not had any problems with it.
For consumer devices maybe, but we've probably got more RS-232 (and RS-422 and RS-485) now than we've had for years, possibly ever. It's widely used in things like device control and automation systems, where only small amounts of data need to be transmitted. I'm thinking of things like access control systems, boilerhouse plant management, and similar things. We also have a lot of interactive whiteboards which use it. In some cases there's a local controller which talks some form of serial to the devices in an area of the building, and this then talks IP to the rest of the World. The main reason that USB isn't used for this sort of thing is that it's limited to a range of about 15 feet, whereas RS-232 is supposed to go 50, and will often go considerably further. RS-422 will go much further. You can use repeaters with USB, but conventional serial connections will do it without, and the speed of USB isn't needed for this sort of thing.
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