| Author |
Message |
idoxlr8@gmail.com
Guest
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 Posted:
Fri Apr 08, 2005 1:50 am Post subject:
cat5 and electrical fields |
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I'm hoping to ask the pros in this group to help me figure an unusual
problem out. I have over 6 yrs experience in tpcip networking and cat5
cabling. I have a small business and cat5 network on a daily basis...
Ok with that said the problem I'm having is running a brand new cat5
cable out to my work shed on my property that is only 70 feet away from
my 3com 24 port router. I already have several other workstations in
the house that are plugged into the router via external wires. They are
on the network and I can ping them whenever needed...
The line to my shed...
I made up the wire.
Tested the wire before I moved the new computer to the shed.
Worked great.
Moved the new computer to the shed.
hooked up the wire.
Can't ping
Cant Access at all...
Ok... I have to run over a 5ft chain link fence...
I've tried all of the possibilities short of digging a ditch and can
not figure this out... Maybe the shed has an open electrical field??
Any Ideas...Suggestions??
Thanks
IDOXLR8 |
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Dmitri(Cabling-Design.com
Guest
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| Posted:
Fri Apr 08, 2005 2:44 am Post subject:
Re: cat5 and electrical fields |
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You said you maid up the wire, then tested. Did you mean that you
installed the jack on the shed end of the cable and THEN pulled to the
shed? If that's true, then you could have easily pulled a wire or two out
of their IDC (punch-down) connectors.
Check to see if there is a link light on the NIC. It should usually be
steady green. Check on the switch, too. If one of the link lights is
missing, then one or both wires of the local end receiving or far end
transmitting pair got disconnected.
It is highly unlikely that you are experiencing any EMI - related problem.
Unless, of course, you are doing some arc welding AT THE SAME TIME as
troubleshooting your network. Monster Garage of a shed, so to speak. If
your shed is like mine and almost everybody else's then EMI is the least
of your worries. CAT5E cables are balanced enough to fight all but the
most extreme EMI sources.
Check the wire map.
Good luck!
--
Dmitri Abaimov, RCDD
http://www.cabling-design.com
Cabling Forum, color codes, pinouts and other useful resources for
premises cabling users and pros
http://www.cabling-design.com/homecabling
Residential Cabling Guide
-------------------------------------
idoxlr8@gmail.com wrote:
| Quote: | I'm hoping to ask the pros in this group to help me figure an unusual
problem out. I have over 6 yrs experience in tpcip networking and cat5
cabling. I have a small business and cat5 network on a daily basis...
Ok with that said the problem I'm having is running a brand new cat5
cable out to my work shed on my property that is only 70 feet away from
my 3com 24 port router. I already have several other workstations in
the house that are plugged into the router via external wires. They are
on the network and I can ping them whenever needed...
The line to my shed...
I made up the wire.
Tested the wire before I moved the new computer to the shed.
Worked great.
Moved the new computer to the shed.
hooked up the wire.
Can't ping
Cant Access at all...
Ok... I have to run over a 5ft chain link fence...
I've tried all of the possibilities short of digging a ditch and can
not figure this out... Maybe the shed has an open electrical field??
Any Ideas...Suggestions??
Thanks
IDOXLR8
|
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idoxlr8@gmail.com
Guest
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| Posted:
Fri Apr 08, 2005 2:55 am Post subject:
Re: cat5 and electrical fields |
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Thanks for replying Dimitri,
Grin... I'm not welding at the time that I'm cabeling...
Yes The lights are on on both the nic and the router... and
just incase... I have tried changing the router port to another...
I know this is screwd up but its really happening for two weeks now...
I even went so far as to buy another batch of cat5 cable.
same results...
Maybe the fence??
Thanks Dimitri
Tim |
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Robert Redelmeier
Guest
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| Posted:
Fri Apr 08, 2005 3:09 am Post subject:
Re: cat5 and electrical fields |
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idoxlr8@gmail.com <idoxlr8@gmail.com> wrote:
| Quote: | I made up the wire.
|
T-568A or -B?
-- Robert |
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Dmitri(Cabling-Design.com
Guest
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| Posted:
Fri Apr 08, 2005 4:06 am Post subject:
Re: cat5 and electrical fields |
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idoxlr8@gmail.com wrote:
| Quote: | Thanks for replying Dimitri,
Grin... I'm not welding at the time that I'm cabeling...
Yes The lights are on on both the nic and the router... and
just incase... I have tried changing the router port to another...
I know this is screwd up but its really happening for two weeks now...
I even went so far as to buy another batch of cat5 cable.
same results...
Maybe the fence??
Thanks Dimitri
Tim
Both link lights on is a good sign. Since you have couple more PCs, it |
never hurts to verify if the link light really shows a connection to the
PC you are troubleshooting ;-).
Check wiremap, I think this is where the problem is. There are couple
other things you can check though:
Are the switch and the NIC capable of auto-negotiating the speed of the
connection? (on older equipment) it happens that they can't come to an
agreement and therefore can't connect.
You are not running a Gig Ethernet, right? Try to manually switch your NIC
to 10Mbit/s, see if it fixes the problem. It's been said that 10Mbit/s
Ethernet can run over barbed wire, so you might as well use that fence as
a transmission medium ;-)
Were you pulling the cable too hard?
Have you used any staples mounting the cable?
Have you cinched the cable too tight with a tie-wrap?
90% of the cabling problems are identified by wire map testing; I keep
coming back to this. Make sure you rule out simple wire map problems
before you start banging your head against a fence ... I mean, a wall ;-)
--
Dmitri Abaimov, RCDD
http://www.cabling-design.com
Cabling Forum, color codes, pinouts and other useful resources for
premises cabling users and pros
http://www.cabling-design.com/homecabling
Residential Cabling Guide
-------------------------------------
##-----------------------------------------------#
Article posted with Cabling-Design.com Newsgroup Archiv
http://www.cabling-design.com/forum
no-spam read and post WWW interface to your favorite newsgroup -
comp.dcom.cabling - 1574 messages and counting
##-----------------------------------------------## |
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Justin Time
Guest
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| Posted:
Fri Apr 08, 2005 12:40 pm Post subject:
Re: cat5 and electrical fields |
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And if the wire map is correct showing all four pair connected to the
correct pins at both ends of the cable, and a different computer gives
the same result, then it's time to test and certifiy fhe cable. You
could have a poor connection that is causing the problem. Some poor
connections will pass wire map but the impedance is just to high to
pass a usable signal. |
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Scott Packard
Guest
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| Posted:
Fri Apr 08, 2005 5:35 pm Post subject:
Re: cat5 and electrical fields |
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On Thu, 07 Apr 2005 18:50:39 -0700, idoxlr8@gmail.com wrote:
| Quote: |
The line to my shed...
I made up the wire.
Tested the wire before I moved the new computer to the shed.
Worked great.
Moved the new computer to the shed.
hooked up the wire.
Can't ping
Cant Access at all...
|
Maybe grounding problems with your AC power.
What if a substantial current is flowing on your twisted-pair?
I have seen coax knocked down by unintentional current flowing
on the shield, and have installed twisted-pair to "get around"
that, rather than fixing the root problem, but what if you
have a worse problem than I've seen, such as 120V or so on
the twisted-pair?
Check that your shed is grounded back to the breaker box
at the house, and your computers and switch are grounded.
- Scott |
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Al Dykes
Guest
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| Posted:
Sun Apr 10, 2005 1:26 am Post subject:
Re: cat5 and electrical fields |
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|
In article <pan.2005.04.08.17.35.37.183987@%HASH%.usenet.us.com>,
Scott Packard <scottp@92.usenet.us.com> wrote:
| Quote: | On Thu, 07 Apr 2005 18:50:39 -0700, idoxlr8@gmail.com wrote:
The line to my shed...
I made up the wire.
Tested the wire before I moved the new computer to the shed.
Worked great.
Moved the new computer to the shed.
hooked up the wire.
Can't ping
Cant Access at all...
Maybe grounding problems with your AC power.
What if a substantial current is flowing on your twisted-pair?
I have seen coax knocked down by unintentional current flowing
on the shield, and have installed twisted-pair to "get around"
that, rather than fixing the root problem, but what if you
have a worse problem than I've seen, such as 120V or so on
the twisted-pair?
Check that your shed is grounded back to the breaker box
at the house, and your computers and switch are grounded.
- Scott
|
Copper Ethernet is isolated by transformers at both ends. There is no
current caused by ground differentials in normal use. Lightning is a
whole different story and good reason to run fiber between buildings.
Go into the properties on the ethernet card and force the settings to
10Mb/half duplex. If it works then you've damaged the cable or
crimped the pins incorrectly.
--
a d y k e s @ p a n i x . c o m
Don't blame me. I voted for Gore. |
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James Knott
Guest
|
| Posted:
Sun Apr 10, 2005 1:35 am Post subject:
Re: cat5 and electrical fields |
|
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Scott Packard wrote:
| Quote: | Maybe grounding problems with your AC power.
What if a substantial current is flowing on your twisted-pair?
I have seen coax knocked down by unintentional current flowing
on the shield, and have installed twisted-pair to "get around"
that, rather than fixing the root problem, but what if you
have a worse problem than I've seen, such as 120V or so on
the twisted-pair?
Check that your shed is grounded back to the breaker box
at the house, and your computers and switch are grounded.
|
Not likely. NICs are connected to twisted pair cable via transformers,
which will eliminate such problems. |
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The Chairman
Guest
|
| Posted:
Sun Apr 10, 2005 7:54 am Post subject:
Re: cat5 and electrical fields |
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|
info_at_cabling-design_dot_com@foo.com (Dmitri(Cabling-Design.com)) wrote
in news:1rn5e.7529740$f47.1383400@news.easynews.com:
| Quote: | Both link lights on is a good sign. Since you have couple more PCs, it
never hurts to verify if the link light really shows a connection to the
PC you are troubleshooting ;-).
|
From the K.I.S.S. School Of Repair: Did you try the cable on the same
computer that you moved to the shed? With the link lights active, it really
seems like there is a software problem. If you tested it on the same
computer, disregard.
If not: Let's get the basics, what OS you are running, configuration, etc.
Ryan |
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Perkowski
Guest
|
| Posted:
Sun Apr 10, 2005 10:59 pm Post subject:
Re: cat5 and electrical fields |
|
|
idoxlr8@gmail.com wrote:
| Quote: | I'm hoping to ask the pros in this group to help me figure an unusual
problem out. I have over 6 yrs experience in tpcip networking and cat5
cabling. I have a small business and cat5 network on a daily basis...
Ok with that said the problem I'm having is running a brand new cat5
cable out to my work shed on my property that is only 70 feet away from
my 3com 24 port router. I already have several other workstations in
the house that are plugged into the router via external wires. They are
on the network and I can ping them whenever needed...
The line to my shed...
I made up the wire.
Tested the wire before I moved the new computer to the shed.
Worked great.
Moved the new computer to the shed.
hooked up the wire.
Can't ping
Cant Access at all...
Ok... I have to run over a 5ft chain link fence...
I've tried all of the possibilities short of digging a ditch and can
not figure this out... Maybe the shed has an open electrical field??
Any Ideas...Suggestions??
Thanks
IDOXLR8
Did you put the RJ45s on the cable? If there is not electric, look for |
crimping problems. |
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glen herrmannsfeldt
Guest
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| Posted:
Fri Aug 26, 2005 11:45 pm Post subject:
Re: cat5 and electrical fields |
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idoxlr8@gmail.com wrote:
| Quote: | I'm hoping to ask the pros in this group to help me figure an unusual
problem out. I have over 6 yrs experience in tpcip networking and cat5
cabling. I have a small business and cat5 network on a daily basis...
Ok with that said the problem I'm having is running a brand new cat5
cable out to my work shed on my property that is only 70 feet away from
my 3com 24 port router. I already have several other workstations in
the house that are plugged into the router via external wires. They are
on the network and I can ping them whenever needed...
|
Assuming it isn't mispaired, the most common cause of these problems,
I have had just plain bad connectors before. Some that would work
when testing continuity but fail when installed in the jacks.
I believe I even had one that would turn on the link light even
though one wire of a pair was connected to the wrong pin. It was
enough to almost work, I could log into a remove machine and then
not be able to do anything.
Check everything for proper pairing, and then for broken, loose,
intermittent, or otherwise bad connections.
-- glen |
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