Talk:List of network buses

RS232

I really don't understand what this one is doing here. RS-232 is not a bus, and contrary to a note is an edit summary it can't be made multidrop with resistors. Consider two transmitters both sharing the same line. One is marking and driving the line low. The other wants to send a start bit so drives the line high. With resistors there is no problem from an electrical standpoint (not that there would be anyway - RS232 is short-circuit proof) but think about what is happening to the line. The two opposing signal will cancel each other out and the line ends up in the undefined range - no valid data at all. In any case, if you extend the standard in this manner what you end up with is no longer RS-232.

You can argue that this page needs to be more broadly defined but in that case there needs to be clarifying comments somewhere on it.

In any case I see a few glaring ommissions here - 10baseT, 100BaseT, and FDDI just scream at me. I'll put those on in the next day or two since I'm a bit busy right now. CrispMuncher (talk) 21:21, 19 May 2009 (UTC)

RS232 isn't multidrop, but I think it's worthwhile to include it here for a benchmark comparison of distance & data rate.

For that matter, 10BaseT isn't multidrop either, unless you consider the whole segment included the active hub or switch. Andy Dingley (talk) 00:01, 20 May 2009 (UTC)

You can certainly make a case for including RS-232 in this page, but if you are to do so you need a comment somewhere to inform the user that the comparison is not strictly between buses as the title of the article implies.

Note on RS232: Like RS-485 and RS-422 it is a voltage/line standard, not a networking standard. Also like those other standards, it can be used in multidrop with the right driver/receiver hardware (chips). The Convention has been for it to be one to one. Ryukurai (talk) 19:22, 9 August 2012 (UTC)

10BaseT and 100BaseT certainly are multidrop. If they were not CSMA/CD would be superfluous. If is precisely because you have multiple machines transmitting and reciveing on the same conductors that collisons occur. The fact that there is a hub in the middle does not change its status. 1000BaseT isn't, though, as a side effect of going switched-only. CrispMuncher (talk) 19:57, 20 May 2009 (UTC).

A bus is simply a communication system that transfers data between components inside a computer, or between computers. RS-232 transfers data between computers & devices or computers & computers (a network), therefore RS-232 does qualify as a network bus.

1553

I was wondering why 1553 and AS bus is not listed

Comment appericated

Riscy —Preceding unsigned comment added by Riscy (talk • contribs) 08:11, 27 May 2009 (UTC)

Agreed. Also don't forget SPI. This is a higher speed bus topology than I2C and is a bus as multiple SPI ports can be daisy chained together. Should these two be included?Ryukurai (talk) 19:22, 9 August 2012 (UTC)

Manchester coding

It seems to me that singling out PSI5 for using Manchester coding is ridiculous - it isn't even the only technology in the table that uses Manchester coding. I've removed this once only for it to be reverted. Opinions? CrispMuncher (talk) 19:38, 12 June 2009 (UTC)

Yes. It's a modulation scheme as most of the others are some flavor of NRZ or NRZI and ethernet on CAT-5 uses 5b/10b and so forth.Ryukurai (talk) 19:22, 9 August 2012 (UTC)

Automotive buses

I found this page looking for more info about network buses used in cars. CAN is the only one that made this list, but there are others in use (to some degree or another). I don't know enough about data networks or WikiPedia to add them, but I'd like to see at least a brief explanation of them.

ISO9141 - (International Standards Organization) single wire simplex to DLC pin 7 only, strictly for diagnosis, Ford wire colors: LB/Wh

SCP - (Standard Corporate Protocol, J1850) unshielded twisted pair redundant multiplex intermodule, DLC pins 2 & 10, 0-5V, Ford wire colors: SCP+ Tn/Or; SCP- Pk/LB

CAN - (Controller Area Network) unshielded twisted pair multiplex intermodule 60 Ohm to DLC pins 6 & 14, Ford wire colors: CAN+ Wh/LG; CAN- Pk/LG

ACP - twisted pair (ASYSON) multiplex, no DLC connection

UBP - single wire multiplex intermodule 12V pulsed to ground

Steve8394 (talk) 04:18, 9 August 2009 (UTC)

Order?

What order is this list in?

--nick (talk) 09:54, 19 March 2012 (UTC)

First entered order. The table has sort ordering arrows if your browser supports this.Ryukurai (talk) 19:22, 9 August 2012 (UTC)

Universal Serial Bus (USB)

I'm surprised this communications bus isn't mentioned. --Thomas Foxcroft (talk) 19:41, 17 June 2014 (UTC)

Well, it is not a network bus. 134.121.69.76 (talk) 17:43, 22 January 2015 (UTC)