David Lesher wrote:

Jim Thompson writes:

The house has only 3-pair, but if I keep careful track of the wiring,
this will work:

TIP1-----------o------------------o
| |
RINGER1 PHONE1
| |
RING1----------)------------------o
|
|
|
TIP2-----------)------o-----------o
| | |
| RINGER2 PHONE2
| | |
RING2----------)------)-----------o
| |
| |
| |
TIP3-----------o------)-----------o
| |
FROM BLOCKERS | NO PHONE LINE CONNECTION OR PHONE
| |
RING3-----------------o-----------o

Fail....I bet.

Why not just leave the ringers on the third pair? You can either
use one side to ground, or bias: a ringer [not a tweedledeedle,
a ringer..] can be set so DC bias one polarity to inhibit it
from ringing. Pick up a Lorain Products Sub_Cycle to make the
20 Hz. you'll need.


Digikey was selling a small ring generator module, the last time I
looked.


--
You can't fix stupid. You can't even put a band-aid on it, because it's
Teflon coated.