Archived from groups: comp.dcom.lans.ethernet (
More info?)
Hi,
I think I got things backwards, the connectors with the white tips are
shorter, but I think that I've also figured out why, and it's pretty
stupid
.
I think that the image with the connectors with the black tips are
actually the (black) protective covers (BIG sheepish gring)...
Jim
ohaya wrote:
>
> Hi,
>
> I went into the office this morning, and found that we had a bunch of
> plastic "SC couplers". These are small plastic things and have female
> receptacles on both ends. Their meant to allow you to extend the SC
> cable by plugging in SC patch cables.
>
> But, I also looked at some SC cables we have, and they have those small,
> longer white tips. I would really like to try to do the crossover with
> one of the cables that I linked below, probably the non-duplex one (so I
> wouldn't have to split the connectors apart, with one of these SC
> couplers on each end.
>
> Can anyone confirm that the black and the white tips won't make a
> difference, i.e., would work?
>
> Thanks,
> Jim
>
> ohaya wrote:
> >
> > Hi,
> >
> > Oh, I forgot one other question: If you look at the description on
> > those links, it says "100 Mbps". I thought we should be able to run
> > GigE over these fiber optics cables?
> >
> > Jim
> >
> > ohaya wrote:
> > >
> > > JD,
> > >
> > > I've seen some "SC-to-SC Patch" cables (vs. "SC-to-SC Duplex Patch"
> > > cables), and they look similar, except that the "Duplex" cables have a
> > > housing attaching the two SC connectors together.
> > >
> > > But I noticed that some of the ones not labelled "Duplex" have black
> > > tips, instead of white tips. For example, here's a non-Duplex labelled
> > > cable:
> > >
> > >
http://www.microcenter.com/single_product_results.phtml?product_id=0163916
> > >
> > > and here's one labelled "Duplex":
> > >
> > >
http://www.microcenter.com/single_product_results.phtml?product_id=0093906
> > >
> > > Also, it might be just be me, but it looks like the black tips are
> > > LONGER than the white tips?
> > >
> > > I'm thinking that if I got one of the former cable, since the connectors
> > > are not tied together, I could easily swap the ends to make my
> > > "crossover"?
> > >
> > > Jim
> > >
> > > JD wrote:
> > > >
> > > > A SC duplex cable (2 SC connectors on a "zip" pair of fiber) will
> > > > probably have the two SC connectors placed side-by-side with a plastic
> > > > housing that keeps them paired. Some housings simply have the SC snap
> > > > into them, others have a plate that you have to slide out of the way to
> > > > remove the connectors so you can swap them.
> > > >
> > > > On the "zip" cable one of the fibers will have labling on it noting the
> > > > fiber type and length markers. We will put a wire tie on (barely snug)
> > > > that lead of a patch cable at both ends, it helps us identify a fiber of
> > > > the pair. One end with a wire tie will go into the xmit of the fiber
> > > > interface on device A, and the corresponding end goes to the rcv
> > > > interface on devicd B.
> > > >
> > > > JD
> > > >
> > > > ohaya wrote:
> > > > > Hi,
> > > > >
> > > > > We need to connect two GigE fiber interfaces, but we're still waiting
> > > > > for a switch to arrive.
> > > > >
> > > > > Is there such a thing as a crossover cable, that will cross over the
> > > > > transmit and receive, and with SC/female receptacles on both ends?
> > > > >
> > > > > I've been googling, but so far no luck.
> > > > >
> > > > > Also, I think these interfaces came with some straight-through couplers
> > > > > which allow us to extend the cables. Can we just plug the cable from
> > > > > one interface cable into the coupler, and do the same for the other
> > > > > interface cable, but "backwards", thus forming a cross-over?
> > > > >
> > > > > Sorry if these are dumb questions, but I haven't worked much with fiber
> > > > > connections before.
> > > > >
> > > > > Thanks in advance,
> > > > > Jim
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