Guys Just to clarify REAL POE is 802.3af compliant, anything else and you're taking a risk with your kit!! (Cisco have something called inline power that is only 24v...but they're switching to 802.3af now).
P > -----Original Message----- > From: Kevin P. Fleming [mailto:[EMAIL PROTECTED] > Sent: Monday, July 19, 2004, 2:02 PM > To: [EMAIL PROTECTED] > Subject: Re: [Asterisk-Users] Cheap PoE switches/injectors? > > Greg Hill wrote: > > > officially, a POE capable switch/etc is supposed to do a discovery routine > > to detect, when a device is plugged into it, whether that device requires > > POE. Right? And the single-port POE injectors are usually nothing more > > than two RJ45 packs with a dc power connector, right? That could be the > > difference in price there: the detection circuitry. Or am I way off? > > No, even the single-port injectors have to have that circuitry, I > believe. Otherwise power on the extra pins would be live all the time, > which could be damaging to any non-PoE equipment you plugged in there. > Also, the PoE device itself wants to negotiate its power usage with the > power supplier, and if the injector didn't respond I don't know if the > PoE device would ever come up. > _______________________________________________ > Asterisk-Users mailing list > [EMAIL PROTECTED] > http://lists.digium.com/mailman/listinfo/asterisk-users > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users