On 04/20/2010 03:50 PM, Brent Thomson wrote: > I got this question from a friend and I don't really know much about > fiber. Anyone here have an answer/opinion? > > -Brent > > ****************************** > > Forwarded Question: > > I am curious about what type of fiber is the most futureproof in a home > where conduit maybe isn’t practical? 50µm? 62.5µm? Single mode? > Multimode? I am specifically curious about what fiber is being used in > lightpeak and this Atlona displayport adapter. I don’t think the > displayport over fiber spec specifies the medium, but Atlona is a > reputable firm and they will probably use the same fiber in upcoming 1.2 > spec cables as these 1.1 spec cables. Since 10G over copper cable is > already viable, I don’t think it is worth installing fiber just for > Ethernet. Conduit in this home is not practical. > -------------------- > BYU Unix Users Group > http://uug.byu.edu/ > > The opinions expressed in this message are the responsibility of their > author. They are not endorsed by BYU, the BYU CS Department or BYU-UUG. > ___________________________________________________________________ > List Info (unsubscribe here): http://uug.byu.edu/mailman/listinfo/uug-list > >
Multi-mode. Single-mode can go much greater lengths sure, up to 80km; multi-mode has limits between 200m - 2km depending on desired data rate (1gb/s and 10mb/s respectively), wavelength, cable quality/condition, splices, etc. For example, 50um @850nm wavelength renders 1Gbps up to 550m. That should be enough for any house run, unless the person wiring decides to run around your house several times with the spool. Single-mode costs more, and requires lasers to transmit, multi-mode uses LEDs or cheap surface lasers. Be careful when working with multi-mode just like you would single-mode; even though there is just an LED on the other end, the way the light is refracted and reflected inside the cable focuses the light. So don't look at cable end with remaining eye! ;-) ;-Daniel Fussell -------------------- BYU Unix Users Group http://uug.byu.edu/ The opinions expressed in this message are the responsibility of their author. They are not endorsed by BYU, the BYU CS Department or BYU-UUG. ___________________________________________________________________ List Info (unsubscribe here): http://uug.byu.edu/mailman/listinfo/uug-list
