Network Tools - CompTIA A+ 220-1001 Prof Messer
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@mary said in Network Tools - CompTIA A+ 220-1001 Prof Messer:
What is a wall of punch down blocks used for?
As he said in the video - it's where all the cables come together in a single place.
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@Dashrender yes, but what is it's total use for? Like is it where all your cables are coming in? What real world scenario would you run into this with?
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@mary said in Network Tools - CompTIA A+ 220-1001 Prof Messer:
@Dashrender yes, but what is it's total use for? Like is it where all your cables are coming in? What real world scenario would you run into this with?
Well, the picture showed 66 blocks, and if you're lucky, you'll never run into those. You can hope that you only ever run into 110 punch down blocks. That's what you see in most data closets/datacenters today.
The cables come from a central point in the building/floor to each workstation. As long as you have wires running to end users/printers/Access Points, etc - you'll have these gathering points. You don't have to punch them down onto 'punch down panels.' You could put a connector directly on the end and plug it into a switch, but this is not considered a good way to do things. Though for the moment, I can't really tell you why - I'm sure Scott has a great reason why using punch downs is so awesome, other than convenience.
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@mary said in Network Tools - CompTIA A+ 220-1001 Prof Messer:
What is a wall of punch down blocks used for?
Legacy phone systems like in the 1980s.
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@scottalanmiller said in Network Tools - CompTIA A+ 220-1001 Prof Messer:
@mary said in Network Tools - CompTIA A+ 220-1001 Prof Messer:
What is a wall of punch down blocks used for?
Legacy phone systems like in the 1980s.
Scott is of course over selling this - there are many places that still use and amazingly deploy this today.
If you install a digital phone system, not a VOIP phone system, it's likely the phones would be connected to a 66 block like that shown in the video.
Yes, these are still being sold today.
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@Dashrender said in Network Tools - CompTIA A+ 220-1001 Prof Messer:
Scott is of course over selling this - there are many places that still use and amazingly deploy this today.
But ONLY for legacy phone systems, there is no use case for this for modern (post 1990s) phone systems. None. This is a purely legacy system for legacy non-data cabling.
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@Dashrender said in Network Tools - CompTIA A+ 220-1001 Prof Messer:
Scott is of course over selling this
Where "of course" means "not".
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@Dashrender said in Network Tools - CompTIA A+ 220-1001 Prof Messer:
Yes, these are still being sold today.
This implies you don't know what legacy means. Of course legacy systems are still sold to people today. You can still buy any old thing you want. You can buy CRT televisions, analogue phones, incandescent light bulbs, oil lamps, whatever. Legacy means it's legacy, not unavailable.
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@Dashrender said in Network Tools - CompTIA A+ 220-1001 Prof Messer:
If you install a digital phone system, not a VOIP phone system, it's likely the phones would be connected to a 66 block like that shown in the video.
Exactly what I said. If you install a legacy phone system. Digital phones are from the 1980s, and that's on the public side. Private is even older. Digital is the old tech that has had no purpose since the late 1990s except for shops that are either fooled into buying something without research, or are trying to keep using legacy investments without having updated in roughly two decades.
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How does the tone generator work exactly? How does it give different tones to different wires?
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@connorsoliver said in Network Tools - CompTIA A+ 220-1001 Prof Messer:
How does the tone generator work exactly? How does it give different tones to different wires?
Basic electronics. It's a circuit like this...
http://electroniccircuitsforbeginners.blogspot.com/2009/12/tone-generator-circuit.html
It's nothing more than a simply EM wave put on the wire. Way more simple than you are likely picturing. Not like an IT thing, like a "fifth grader making a basic circuit" thing
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@connorsoliver said in Network Tools - CompTIA A+ 220-1001 Prof Messer:
How does it give different tones to different wires?
It doesn't. The basic tone generator only tones a single pair. But because of crosstalk, you still need to verify the pair with a continuity test to be certain.
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I remember when sometimes I used some of the network tools mentioned on this video, also making my own RJ45 cable connection for first time.
