On Tue, 27 Sep 2005, David Van Horn wrote:

> Umm.. Where did that 12V come from?  You aren't guaranteed more than a
> few volts.  It's 600 ohm impedance, not DC resistance.
> You are free to bank any power that you don't need, and you are welcome
> to draw as much DC current as you can, but you will crash the voltage
> when you do that.

For maximum power transfer load must match generator. It is not 
practical to invest too much in this, however, so real life ballpark 
values can be used. Phone lines loaded about as much as one dares in 
this sense of the phrase go to about 12V at 20-30mA drain. If you are 
directly connected to the pbx (2 meters of cable) you can draw 50+mA.

>> countries. This applies to 1) and 2).
>
> About the time we get permanent colonies on Neptune...

Guess who's going to do the initial cave digging there ? There is a new 
thing on the block, it's called VoIP (aka bybye sucky-telco-monster, 
and don't bother to write).

I didn't write this email either.

Peter
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