*** Quoting Jeff Edmonson to Joe Beels dated 11-06-95 ***
> SB
>  JB> and the phoneline.
> 
> What do you think about a 1:1 xfrmr, with an RC network to form an
> impedance of about 600ohms, connect that to an RJ-11 jack.  The other
> side another RC network to match the output Z of the SB (say,
> 10kOhms?)
> 
> How about (quick scratching of my noggin) Rout (RJ-11 side) seriesed
> with one leg of the xfrmr, and a .01uf cap accross the lines.
> 
> The Input side (from the SB) a 1k (again, seriesed with the hot side
> of the output) and a .1uf accross the xfrmr leads...
> 
> Hmmm... I need to toss this together, and see if I can get some music
> played accross the phone line!  (would be GREAT for recording a
> Message, and transferring it to a answering service!)
> 
> 
>                                     \|||||/
The Paging adapter does just that ... matches the audio line to 600 ohms and 
uses a capacitor to dry the phone line out .. it'll also monitor line 
condition and come off hook when the line impedance drops ...it may have some 
auxiliary relay functions and most probably audio level controls built in.. 
there are a few different flavors out there already built up .. although I've 
built them myself when I had to ... they generally go from about $115 on down 
depending on the features ... some have an audio path only from the phone 
line, some have duplex operation .. ya gotta look close at the specs ..
--- T.A.G. 2.7c Beta
---------------