Is there such a thing as an "SC Crossover" coupler or cable
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Posted by ohaya on September 24, 2004, 9:07 pm
Please log in for more thread options 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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Posted by JD on September 24, 2004, 9:16 pm
Please log in for more thread options 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: | |||||||||||||
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Posted by ohaya on September 25, 2004, 11:15 am
Please log in for more thread options 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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Posted by ohaya on September 25, 2004, 11:16 am
Please log in for more thread options 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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Posted by ohaya on September 25, 2004, 5:57 pm
Please log in for more thread options 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 | |||||||||||||
>
> 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