[asterisk-users] phone as control interface(was99bottlesof beer)

[Dovid B]

----- Original Message ----- 
From: "John Faubion" <jfaubion at tx.rr.com>
To: "Asterisk Users Mailing List - Non-Commercial Discussion" 
<asterisk-users at lists.digium.com>
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  ?