[vox-tech] Carrying telephone signal over ethernet

[Jeremy Brown]

At an old apartment of mine, there were identical plugs that you could 
either plug a phone or a computer into. The only way to know which to 
use was the color of the jack. I have a splitter on my desk like the one 
I mentioned in another email. It quite comfortably fits either a phone 
plug or an RJ45 plug. I just tried. No mashing. In fact, I looked 
closely at how they went in and it was clearly designed to do just that. 
It fits in quite cleanly and the 6 pins meet the center 6 pins of the 
rj45 plug.

>>IIRC, Cat3 (i.e. 10baseT) was designed with phone compatibility in 
>>mind.. and leaves the center pair unvired, so that it's compatible with 
>>the older rj11 plugs in a very direct way.  You can plug an old rj11 
>>plug into a rj45 jack, and I think that the original conception was 
>>that every jack would carry both phone and ehternet, and you could plug 
>>either computer or phone in as needed.
>>    
>>
>
>Voice'll run on just about anything, though Cat3 is the typical
>"minimum" accepted by everyone.
>
>And no, you can't just plug an rj11 into an rj48 port.  Sure you can
>mash it in, but a 6 pin wide rj11 will mash pins 7 and 8 of the rj48,
>and it won't fit too well either (it'll come loose and not make good
>contact).  Don't do it.  Bad.  Use (or make) an adapter plug.
>
>I'd humbly suggest it's best to keep uninformed opinions to yourself, as
>you didn't add anything to this thread other than misinformation.
>
>  
>