At 03:56 AM 7/18/2003 +0000, annlee wrote: >Here is some help >http://www.americanfibertek.com/FAQ.htm#fiber
"singlemode fiber is half the cost of multimode fiber" ??? > and >http://www.americanfibertek.com/products/PDFCatalog/History.pdf >All the fiber I saw followed the convention orange=MM, yellow=SM. MM fiber >is not capable of handling SM input, With conditioning cable patches it can. > but SM fiber can handle MM input. Is this a fact? No restrictions, no gotcha's, it just works? > IIRC, >the reason was power on the laser emission as well as frequencies used, etc. >There is also some info in SONET, 3e, by Goralski >--it's on amazon.com. I have the 2e, and I learned a ton from it, including >the introductory material about how networking developed as it did. It's good for an introduction, I just wish it would continue to elaborate on the optical aspect, instead of getting into the boring details of SONET. He chose the title well though, I have to give him that... :) >In our lab, we weren't often blessed with red and blue connectors; more >often it was dual black connectors, in which case we ran fingers down the >fiber to get the 180-degree twist (rx--tx and tx--rx): it really is a manual >crossover. I usually check the inscription on the cable. On the cables we use, only one half has an inscription (on both ends). > The finger roll only works in a lab, though. Dolphins lose their >grip on the transoceanic fibers... They must be using color codes... :) Thanks, Zsombor >Annlee > >""Zsombor Papp"" wrote in message >news:[EMAIL PROTECTED] > > At 01:20 AM 7/18/2003 +0000, Bill wrote: > > >Just learning basics of fiber communication. > > > > Btw, optical communication is indeed an interesting topic. Does anyone >have > > a recommendation for a good book on this? I would be very interested in a > > book (let alone web site) that explains the fundamental principles > > (modulation, dispersion, spectral width, etc) in a great detail, but > > without making my brain explode with thousands of formulas. (Yeah, I know, > > it's not an easy request.) > > > > For example, why exactly do we need that conditioning cable when >connecting > > a MM cable to a SM interface? > > > > Thanks, > > > > Zsombor > > > > > I am not sure about which fiber > > >cable I saw but it was orange and basically connected two 3550's >together. > > > > > >The fiber had two connectors on each side. One was blue and the other was > > >red. > > > > > >How is it normally connected? I guess the switch ports are receive and > > >transmit. So, does that mean if you connect red on the left port on one > > >switch, you would connect the red on the other side of the cable to the > > >right port of the switch? > > > > > >Thx > > >bill Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=72558&t=72544 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
