Re: Modem to Modem without a line simulator?

>  The current is used for the carbon mike and to tell
the
> phone system that the phone is off the hook. Line
connected
> modems don't have any use for the current and only
have
> a load resistor there to keep the line connected.
 
Something I forgot about earlier :
 
I think the GPO Modem 13A (A plinth mounted under a normal
dial-type 
phone) could be strapped to draw its power from the line.  I
don't know 
the full deatails, I do have one of these modems (300 baud
CCITT 
oriignate only), but I have no diagrams other than the
connection lable 
stuck inside. But there's certainly a transformer-isolated
PSU circuit on 
the board, and one setting of the straps seems to connect
the input of 
this to the line
 
-tony