I use PoE every day -- it powers the outdoor antennae that connects to my wireless ISP (distance of about 5 miles). I have gotten up to 3000kb/s over this link (which is slightly higher than what I'm paying for). So, whatever you are debating here, PoE is almost certainly *not* the problem.
David Woolley wrote: > Unruh wrote: > > >> Just looked it up. A bit bizarre-- power over the ethernet? The ethernet >> has no power supply capability. Do you mean that you have to supply the >> device with 60V running on one of the unused ethernet cable lines? Sounds >> noisy to me. >> >> > I believe it is a relatively new, but very real, standard. The power is > transmitted as a phantom between two pairs. In one variation, they are > the pairs used for normal, 10baseT. I gather one reason is that there > are exemptions in electrical codes for ELV power feeds as part of > datacommunication systems, whereas a normal feed would require a > formally qualified (not just competent) electrician. > > The feed is 48V DC. I'm not 100% sure that counts as ELV, but it is the > same as most analogue telephone systems. > > The apparent source specification is IEE 802.3-2005, although I haven't > gone to source. > > As the power is common mode with respect to the signals, the noise > should not be excessive. > _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
