| Author |
Message |
Alexander Burke
Guest
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 Posted:
Wed Aug 10, 2005 11:11 pm Post subject:
Duplex LC-LC Jumper Cable - How to convert to crossover? |
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Hello!
I have two Catalyst 3560G-24PS switches with Cisco 1000Base-SX SFPs. I
have some very nice Amphenol single-mode duplex jumper cables (P/N
942-625DD-10000), 50cm in length, which I would like to use to connect
the two switches.
However, they are wired straight-through -- the transmit fiber on one
end goes to the transmit position at the other end, so therefore no
worky.
Is it possible to separate the little clip around the LC connectors
which holds them together (like you can do with duplex SC connectors)
so that I can reverse the fibers at one end of each of these patch
cables to effectively make them crossover, so that I can use them as
intended? If so, how?
If not, is the plastic clip removable entirely (with a Dremel, if need
be!) to turn each duplex cable into two simplex cables?
Thanks in advance! |
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Sonny
Guest
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| Posted:
Thu Aug 11, 2005 12:06 am Post subject:
Re: Duplex LC-LC Jumper Cable - How to convert to crossover? |
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If you cant separate them, open the fiber enclosure and swap them in there.
"Alexander Burke" <alexander.burke@gmail.com> wrote in message
news:1123697512.412741.83810@g14g2000cwa.googlegroups.com...
| Quote: | Hello!
I have two Catalyst 3560G-24PS switches with Cisco 1000Base-SX SFPs. I
have some very nice Amphenol single-mode duplex jumper cables (P/N
942-625DD-10000), 50cm in length, which I would like to use to connect
the two switches.
However, they are wired straight-through -- the transmit fiber on one
end goes to the transmit position at the other end, so therefore no
worky.
Is it possible to separate the little clip around the LC connectors
which holds them together (like you can do with duplex SC connectors)
so that I can reverse the fibers at one end of each of these patch
cables to effectively make them crossover, so that I can use them as
intended? If so, how?
If not, is the plastic clip removable entirely (with a Dremel, if need
be!) to turn each duplex cable into two simplex cables?
Thanks in advance!
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Justin
Guest
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| Posted:
Thu Aug 11, 2005 12:20 am Post subject:
Re: Duplex LC-LC Jumper Cable - How to convert to crossover? |
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Another thing I just noticed re-reading this post, you list your GBICS
as 1000Base-SX, well SX is for short wavelength (850nm) which is
multimode. Yet you list your patch cord as single-mode. That's not
gonna work either. I believe the typical expectation for launching
multimode transmitter into singlemode cable is about a 45dB loss. Now,
patching two switches directly, this may not be that bad, but it is
probably still a deal killer.
Alexander Burke wrote:
| Quote: | Hello!
I have two Catalyst 3560G-24PS switches with Cisco 1000Base-SX SFPs. I
have some very nice Amphenol single-mode duplex jumper cables (P/N
942-625DD-10000), 50cm in length, which I would like to use to connect
the two switches.
However, they are wired straight-through -- the transmit fiber on one
end goes to the transmit position at the other end, so therefore no
worky.
Is it possible to separate the little clip around the LC connectors
which holds them together (like you can do with duplex SC connectors)
so that I can reverse the fibers at one end of each of these patch
cables to effectively make them crossover, so that I can use them as
intended? If so, how?
If not, is the plastic clip removable entirely (with a Dremel, if need
be!) to turn each duplex cable into two simplex cables?
Thanks in advance!
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Alexander Burke
Guest
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| Posted:
Thu Aug 11, 2005 6:22 am Post subject:
Re: Duplex LC-LC Jumper Cable - How to convert to crossover? |
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I can't open the fiber enclosure, since there is none -- the connection
is directly from one SFP to another.
I was aware of the mode issue, but I just wanted to get it to the point
where the mode might be the problem, which would be a huge improvement
over the current situation! :)
The cable is only 0.5m long, so hopefully I'll still get *something*
out of it. |
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