----- Original Message ----- From: "John Faubion" <[EMAIL PROTECTED]> To: "Asterisk Users Mailing List - Non-Commercial Discussion" <[email protected]> Sent: Tuesday, October 16, 2007 9:46 AM Subject: Re: [asterisk-users] phone as control interface(was99bottlesof beer)
>> has anyone actually been satisfied with the performance of these >> powerline signalling devices ? > > Universal Powerline Bus is a vast improvement over the original X10. I > believe the X10 devices used a 4V signal during the zero crossing point of > the AC voltage to transmit 1 bit. Needless to say this made X10 slow, > susceptible to line noise and not very reliable. IIRC X10 is only 75% > reliable. By contrast, UPB is 20-40 times faster, it uses a higher > signaling > voltage so line noise isn't a big factor any more and has the advantage of > controlling 250 times more devices than X10. This will help to prevent > stray > signals from the neighbors controller from accidentally controlling your > devices. UPB is supposed to be 99.9% reliable with a latency of less than > 100 milliseconds. Granted that still leaves a tenth of a percent of > uncertainly. However that is without resorting to filters, couplers and > the > like. > >> Granted in an existing situation there may not be a way to run more >> wires, but I evaluated them a while back and decided to stay away. > > You may want to take another look at them. Just like Asterisk has made > great > strides since the release of 0.7, UPB has brought the quality level way > up. > Of course this higher quality also has a higher price. > > John > Anyone on the list interested on working on a project where we can create devices that work over Ethernet ? _______________________________________________ --Bandwidth and Colocation Provided by http://www.api-digital.com-- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
