There are several models of PMG bakelite phones, but I'll guess that you mean it is one of the 300 or 332 series.
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They will work on most (if not all) public telephone exchanges in Australia.
I will assume you are talking about a table model. Both schematics were essentially the same but the casing and construction were different.
When these phones were the standard instrument the usual wall termination block was the 20/4 terminal block (table model) using hard wiring to screw terminals - there were no plug and sockets like the 605/610 series as on the later 800 series.
This means that if you want to adapt a 300 series to use the 605/610 plug and socket you will have to do some minor modification regarding the line cord. If you want to keep the old line cord (should be 3 conductor Red, Black, Green) which terminates on the 20/4 terminal block then you will have to modify the spade terminals so that they can be soldered to the termianls of the 605 plug. The 605 plug normally uses miniature quick connect female connectors. You will have to remove the terminals from the plug to solder them otherwise you will melt the plastic.
In the phone the Black will be on terminal 1, the Red will be on terminal 9 and the green will be on termnal 2. There should be a link strap between terminals 1 and 2 when used as a normal phone without an extension bell.
In the plug the Black conductor is soldered to terminal 2 while the Red goes to terminal 6 and the Green to terminal 3.
If a magneto extensi :Hi All, : :Just wondering if anyone here has modded (or knows how) an old bakelite :rotary phone to work on the modern phone system? : :Do we even have pulse dialing anymore - or does that vary from exchange :to exchange? : :The few old phones that I have seen indirectly (eg eBay) definitely have :some alteration to the wiring, but its not clear how exactly. : :TIA