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Sheilded (STP) versus Unsheiled (UTP) Cat 5

I need to run sheilded cable to some industrial devices as per the vendors specification but I have only ever used UTP Cat5e in my Cisco switches.  Will this cable work fine in any switch or do I need to get a switch that states it can support STP cables.  Are there any isues when running this tpye of cable into a standard 3900 catalyst.  Cisco's web site specs out the switch with UTP and doesn't state anything baout sheilded cable
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UHampton
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UHampton
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7 Solutions
 
pseudocyberCommented:
No problem.  As far as the switch is concerned, ethernet is ethernet.  The interface will of course take an RJ-45 connector, but other than that no issues.
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ciscoguy69Commented:
pseudocyber is correct, the cable makes no difference except if there is a loss or interference difference for the length of the run. As long as the voltage is in spec by the ends of the line, STP or UTP make no difference.
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troelandCommented:
STP can be a bit more of a pain in the butt to terminate correctly, but other than that they are functionally the same.

TJR
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MiamiCoCommented:
There isn't problem by using STP but... Wall jacks MUST  be shieldet , RJ-45 MUST be shieldet and every cable that you use for connecting devices  must be STP ( Device > STP cable > Wall jack > STP cable > Rack > STP cable > switch). Another way , it has no sence to you STP cable.

If you want know more about cabling check standards ANSI/EIA/TIA-568 and 569.
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pseudocyberCommented:
I haven't ever worked with STP in production - so I'm asking for my own education as well as the asker's ...

Assuming no EMI/RFI problems in an equipment room and the users workstation, and lets say the horizontal cable passes through a known noisy zone, and is STP, couldn't you terminate both ends of the STP cable properly, with ground, drain, etc and use normal UTP patch cables to cross connect to equipment?
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ciscoguy69Commented:
pseudocyber, the answer is yes. The use for shielded is to prevent or reduce interference on the line. Once you are in a reduced interference zone, you can technically switch. You will incur reduction of signal at the transition point, so I wouldn't add  transition point just for the sake of adding one, but yes you can.
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MiamiCoCommented:
pseudocyber:
Yes, you can. :-) Standard is standart and network can work even if its not build according to standards. Patch cable from PC to the wall jack its not so long ... max 5M.

Main point is good wiring outside "work area". What helps me if I have connected STP cable to my pc and cable in wall is maybe not shieldet and runs close to power cables? Nothing.

Example: in our company is network wired paralel to power cable, and everything works, but if I look at network traffic, I see some errors (CRC). So network work but problems occurs and maybe because of our cable "management".
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