[Gllug] How to prove a computer is overheating.

[Peter Childs]

Chris Bell wrote:

>On Sun 16 Jan, Peter Childs wrote:
>  
>
>>Chris Bell wrote:
>>
>>    
>>
>
>  
>
>>>  I asume the ethernet cables are OK, with no data corruption.
>>>
>>> 
>>>
>>>      
>>>
>>    Can I not answer that question as the network is a bad subject,
>>
>>    I mostly wired it. If you know any way of testing it I would love to 
>>hear it.
>>
>>    Its mostly 100Mbts (Switches) with CAT5 cables the only bit thats a 
>>bit anoying is the 10Mbts subnet running over good old Coax.
>>
>>Peter Childs
>>    
>>
>
>   I only have a two-part cable tester which can check whether Cat5 pin to
>pin connections are correct and good, with no shorts or open circuits, but
>not whether the correct wires have been used in the correct order. Most
>problems are associated with cables connected using an incorrect sequence of
>wires, because the layout is not obvious. The wire order can usually be
>checked using a magnifying glass, and some idea of the data error rate by
>typing
>
>ifconfig <return>
>
>   Coax has gained a poor reputation, possibly because it is not always
>mechanically robust, it suffers from every suspect connection along the way,
>and must be correctly terminated at both ends of the run.
>
>Standard ethernet connections 1 to 1    Cross wired cables are connected
>         ___________________ 
>         |                 |
>W/O  ----|                -| 1          1  W/O  3  (W/G)
>O/W  ----|Cable  Contacts -| 2          2  O/W  6  (G/W)
>W/Gn  ---|............... -| 3          3  W/G  1  (W/O)
>Bu/W  ---|              . -| 4          
>W/Bu  ---|............... -| 5          
>Gn/W  ---|                -| 6          6  G/W  2  (O/W)
>W/Bn  ---|(Latch below)   -| 7          
>Bn/W  ---|                -| 8          
>         |_________________|
>
>Pairs DO cross over in the middle!
>Only two of the pairs are normally used, the others could be used for
>telephone or a second data set using splitter adapters.
>
>  
>
    However 1Gbts ethernet use all 8 wires. Normal Ethernet cables do 
not cross, The only reason for crossing is if you want a cross over 
cable, ie no Hub or Switch.

Peter Childs
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