I was at the habitat for humanity store the other day, and they had a pair of those "wireless phone line" extenders for $2.50. I picked them up and brought them home, thinking I could fake it into sending serial data, ethernet, or something like that.
And then I thought about it-- I'm pretty sure they're "wireless" in that you don't have to string wire between them. Also pretty sure they inject the signal into the house wiring. I don't know that this unit is one of those for sure, but the size of the transformer and the lack of any clear aerial makes me think it is. I'll be playing "hunt the datasheet" later on to see if I'm right.
If it is, I wonder if it'd be possible to cut out the POTS stuff and use it as an injector for carrier current AM?
Probably, but not exactly.
The actual rule for AM carrier current allows a lot more power than the rule that describes carrier current on non-medium wave (AM) frequencies.
Many "wireless-by-wire" devices, like baby monitors and intercoms, use long wave frequencies down around 184 kHz.
No one would want their phone calls to show up on the AM dial.
I was hoping some how that some manufacturer would come up with a safe way to plug a coupler into the standard 110 socket and be able to use the coupler to make it possible to do carrier current on an iAM transmitter. But I found it might not be possible.
WaxyMouthfeel the FCC rules pertinent to carrier current are
15.221 - AM/medium wave band
15.209 Subpart B - 9 kHz to 30 MHz.
That second rule took me several hours to find, it's really tucked in with a bunch of other do's and don'ts.