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I made a change which I thought made it more readable, but was reverted. The original, and now reverted text, says: and the 2 supposedly refers to the maximum segment length of 200 meters, though in practical use it can only run up to 185 meters. (The IEEE rounded 185 up to 200 to come up with the name 10BASE2, for consistency with the general standard). The maximum segment length in the standard is 185m. It will work on longer runs with better cable, and shorter with lower quality cable, but the number is 185m. They could have named it 10BASE1.85, but decided to round it to 10BASE2. (I prefer lower case, as in 10base2, the IEEE seems to disagree, but that is a different question.) The 2 comes from rounding 1.85 up, the standard never says that it is 200m, or that in practical use it can only run 185m. The current text seems a complicated way to say that it is rounded, while implying something that the standard does not say. Can we do better? Gah4 ( talk) 03:49, 3 October 2016 (UTC)
The following discussion is closed. Please do not modify it. Subsequent comments should be made on the appropriate discussion page. No further edits should be made to this discussion.
although the underlying logic may still be present If you mean for x86 machines, I don't ever remember built-in 10base2 ports. By the time they got around to putting ethernet on board, it was already 10baseT and even 100baseTX. Some workstations did, though. NeXTstation, which I still have, and some Sun machines. I now have a Sun3/e with its associated SCSI/ethernet board, and the latter has AUI and 10base2 ports. But many Sun systems had only AUI, or AUI/10baseT ports, in later years. Now some NIC may have had the PC wiring, but the circuits not installed. It is fairly common to build a PC board with the features of the high-end model, and not install all the components when building the low model. For 10base2, you need a DC to DC converter to isolate the transceiver. That may be the bigger cost of a 10base2 port. Gah4 ( talk) 12:09, 15 January 2017 (UTC)
In addition to CB radio, RG/58 cable is very commonly used when there is need for a coaxial cable. It is common for audio, when something better than the usual home grade cable is wanted. Pretty much everything except for video and TV antennae, which use 75 ohm RG/59. That is, common in research laboratories for connecting up a large variety of signal sources and sinks. Racks of cables with BNC connectors on them are common in research labs. (RCA connectors for audio.). Gah4 ( talk) 15:01, 25 February 2019 (UTC)
This article seems to be written in Present Tense, but this standard was long obsolete before Wikipedia even existed. Dwedit ( talk) 19:40, 31 March 2023 (UTC)
There is currently edits, and edit summaries, about RG59 and other 75 ohm cables. The National Semiconductor Application Note AN-620 [1] for the 8392 transceiver chip on how to do it. Because collision detect depends on measuring voltage based on a current source, that has to be adjusted for other impedance cables. The UN allows for 75 and 93 ohm cable. It might be possible to modify transceivers, following the UN. I know some have used 75 ohm cable with 50 ohm terminators. For two stations near the end, that might work. There will be a reflection, but maybe not too much. But really, if you want to do it, modify the collision detection. Gah4 ( talk) 02:55, 10 May 2024 (UTC)
References
This is the
talk page for discussing improvements to the
10BASE2 article. This is not a forum for general discussion of the article's subject. |
Article policies
|
Find sources: Google ( books · news · scholar · free images · WP refs) · FENS · JSTOR · TWL |
Archives: 1Auto-archiving period: 365 days |
This article is rated C-class on Wikipedia's
content assessment scale. It is of interest to multiple WikiProjects. | |||||||||||||||||||||||||||||||
|
This article is based on material taken from the Free On-line Dictionary of Computing prior to 1 November 2008 and incorporated under the "relicensing" terms of the GFDL, version 1.3 or later. |
I made a change which I thought made it more readable, but was reverted. The original, and now reverted text, says: and the 2 supposedly refers to the maximum segment length of 200 meters, though in practical use it can only run up to 185 meters. (The IEEE rounded 185 up to 200 to come up with the name 10BASE2, for consistency with the general standard). The maximum segment length in the standard is 185m. It will work on longer runs with better cable, and shorter with lower quality cable, but the number is 185m. They could have named it 10BASE1.85, but decided to round it to 10BASE2. (I prefer lower case, as in 10base2, the IEEE seems to disagree, but that is a different question.) The 2 comes from rounding 1.85 up, the standard never says that it is 200m, or that in practical use it can only run 185m. The current text seems a complicated way to say that it is rounded, while implying something that the standard does not say. Can we do better? Gah4 ( talk) 03:49, 3 October 2016 (UTC)
The following discussion is closed. Please do not modify it. Subsequent comments should be made on the appropriate discussion page. No further edits should be made to this discussion.
although the underlying logic may still be present If you mean for x86 machines, I don't ever remember built-in 10base2 ports. By the time they got around to putting ethernet on board, it was already 10baseT and even 100baseTX. Some workstations did, though. NeXTstation, which I still have, and some Sun machines. I now have a Sun3/e with its associated SCSI/ethernet board, and the latter has AUI and 10base2 ports. But many Sun systems had only AUI, or AUI/10baseT ports, in later years. Now some NIC may have had the PC wiring, but the circuits not installed. It is fairly common to build a PC board with the features of the high-end model, and not install all the components when building the low model. For 10base2, you need a DC to DC converter to isolate the transceiver. That may be the bigger cost of a 10base2 port. Gah4 ( talk) 12:09, 15 January 2017 (UTC)
In addition to CB radio, RG/58 cable is very commonly used when there is need for a coaxial cable. It is common for audio, when something better than the usual home grade cable is wanted. Pretty much everything except for video and TV antennae, which use 75 ohm RG/59. That is, common in research laboratories for connecting up a large variety of signal sources and sinks. Racks of cables with BNC connectors on them are common in research labs. (RCA connectors for audio.). Gah4 ( talk) 15:01, 25 February 2019 (UTC)
This article seems to be written in Present Tense, but this standard was long obsolete before Wikipedia even existed. Dwedit ( talk) 19:40, 31 March 2023 (UTC)
There is currently edits, and edit summaries, about RG59 and other 75 ohm cables. The National Semiconductor Application Note AN-620 [1] for the 8392 transceiver chip on how to do it. Because collision detect depends on measuring voltage based on a current source, that has to be adjusted for other impedance cables. The UN allows for 75 and 93 ohm cable. It might be possible to modify transceivers, following the UN. I know some have used 75 ohm cable with 50 ohm terminators. For two stations near the end, that might work. There will be a reflection, but maybe not too much. But really, if you want to do it, modify the collision detection. Gah4 ( talk) 02:55, 10 May 2024 (UTC)
References