AE-1 & 181427 Network

[ShoeFone]

I found that the 427 module schematic I had did not match the one in the previous PDF.
For example F would go to C1 which would go to RR if it was populated on the board.
It took a little longer to put the module in reverse (engineering).

I had to draw out the whole thing to understand where I left off before I forgot everything as to what I was trying to do.

The coupling transformer (I had to unsolder it) had me confused.
Why the adjacent pins are not a single winding, as they are all over the place.
Then I had to make a library to represent what I was ringing out for the PCB program.

I ended up with the schematic seen below. The left side is not properly drawn but is representing the physical location of the parts on the module.

The right side is the add on module to inject the TT audio.

The dialing mechanism was reworked into a common reference point for the mute and pulse contacts.

Now I ask all of you will the bridge rectifier steer the line voltage to where it needs to go as do I need the mute and pulse contacts to shorted on the 427 module to be bypassed with a jumper(s) to make the rest work?

I haven't thought that all out yet.
I want to inject the TT audio in point B and then I don't know where GND would reference to L1, or the bottom of the bridge rectifier?

I don't know, please help.

[ShoeFone]

The actual 427 module in the pay phone:

[poplar1]

[D]o I need the mute and pulse contacts to shorted on the 427 module to be bypassed with a jumper(s) to make the rest work?

If the Normally Closed dial pulse contacts are connected to F and RR, and the Normally Open mute contacts to R and GN (as in a 500 set), then, if you want to bypass the dial, the hook switch wire would be moved from F to RR. It would not be necessary to short the mute contacts' location on the network, since they are normally open. In fact, shorting R and GN would effectively short the receiver at all times -- not desirable.

However, with the dial left in the circuit, this should not be a problem. An ATA that does not recognize dial pulses would just ignore them. (Correct me if I am wrong, for example, if the pulses would damage the ATA.)