Question for DereckB

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I can't speak for Dereck, but I tend to avoid clicking links without having some notion of where they will take me, even if they were posted by someone I knew. Might I ask for a few words that describe the site to which that link will take the reader?
 
charlie b said:
I can't speak for Dereck, but I tend to avoid clicking links without having some notion of where they will take me, even if they were posted by someone I knew. Might I ask for a few words that describe the site to which that link will take the reader?
Click to expand...

I clicked on it......I did not blow up. A little paranoid? No issues from Pierre! Relax.
 
charlie b said:
I can't speak for Dereck, but I tend to avoid clicking links without having some notion of where they will take me, even if they were posted by someone I knew. Might I ask for a few words that describe the site to which that link will take the reader?
Click to expand...

Hover your cursor over the link, and look in the lower left of your screen. The URL that it will take you to should be shown there.
 
charlie b said:
I can't speak for Dereck, but I tend to avoid clicking links without having some notion of where they will take me, even if they were posted by someone I knew. Might I ask for a few words that describe the site to which that link will take the reader?
Click to expand...


Charlie
I am very much the same sometimes. Past experience has kept me from clicking on a lot of links I have come across.

This link is to an engineering paper that looks pretty interesting and some info provided is over my head. Dereckbc is an expert in this part of the industry and I was looking for some guidance as to the validity of the PDF.
 
Pierre the paper is a bit self promoting, but the information is accurate. Basically the paper is saying Common Mode Signal Transmission generates EMI/RFI, and is susceptible to EMI and RFI interference, and Differential Mode or Balanced Signal transmission using UTP does not generate EMI/RFI, and is not affected by EMI/RFI interference. That is pretty much true up to a point, by that I mean I can take a high power transmitter (brute force) and make TCIP any I/O transmission fail.

Now with all that said, the article is a moot point now days and is well known. In the early days of data networking signal protocols were Common Mode or unbalanced like RS-232. This is why data centers needed elaborate signal reference grids and grounding topologies. But today almost all I/O signal transmission is Ethernet and/or Optical using Differential Mode or Balanced Transmission making most of the grounding schemes of yesterday antiquated.

Don?t take me wrong, there is still some need for special grounding topologies like mesh grid, isolated single point, and transient suppression, but today that is limited to certain areas of equipment rooms like a Digital Switch, and Radio transmission.
 
dcspector said:
I clicked on it......I did not blow up. A little paranoid? No issues from Pierre! Relax.
Click to expand...
You missed my point. This is not about unsafe links.

It is a matter of courtesy to let a person know what a link might contain, so that the person can make an informed decision about whether they are interested in following that link. The moderators are trying to discourage the posting of "Cool link, click here" threads, unless they contain at least some description of what is "here."
 
charlie b said:
You missed my point. This is not about unsafe links.

It is a matter of courtesy to let a person know what a link might contain, so that the person can make an informed decision about whether they are interested in following that link. The moderators are trying to discourage the posting of "Cool link, click here" threads, unless they contain at least some description of what is "here."
Click to expand...




I have not seen that info posted, if it is so, maybe a Stickey should be posted.
I post links as I do for the reason of brevity, I will try to become more imaginative.
 
Pierre C Belarge said:
Thanks Dereck
Now I can go back to the guys and sound like I know what I am actually saying.

"smoke and mirrors"

Pierre
Click to expand...

I wouldn't say Smoke and Mirrors. But here is a good take away. I do know there are some systems today that still used unbalanced transmission techniques. One example is POS equipment used in restuarants and I have seen them use RS-232. These units do have problems with interference from the AC electrical system.

Manufactures always blame the AC, and there is some truth to it. But they reccomend ver expensive electrical upgrades. When the solution is very simple, 100% effective, and cheap. Just use an RS-232 optical isolation modem. There a a plug that goes directly to the RS-232 port and connected to the DCE/DTE with an optical fiber cable. Problem solved with minimal expense and labor of running the cable between devices.
 
charlie b said:

You missed my point. This is not about unsafe links.

It is a matter of courtesy to let a person know what a link might contain, so that the person can make an informed decision about whether they are interested in following that link. The moderators are trying to discourage the posting of "Cool link, click here" threads, unless they contain at least some description of what is "here."
Click to expand...

Charlie I am sorry I came off a bit abrasive, but that was not my intent at all. I see your point 100%. I work from a fed based system here and I must be very careful as well. I guess since I know Pierre and trust him and his posts I took your post the wrong way. I appologize.
 
FWIW, I've been using noScript for the past year, and it pretty much prevents any surprises from unknown links. See http://noscript.net/ for more info.

"The NoScript Firefox extension provides extra protection for Firefox, Flock, Seamonkey and other mozilla-based browsers: this free, open source add-on allows JavaScript, Java, Flash and other plugins to be executed only by trusted web sites of your choice (e.g. your online bank), and provides the most powerful Anti-XSS protection available in a browser. "
 
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