Nice one Telstra. Then again, probably cost more to collect the coins than was received in cash revenue.
As an aside, the old dial payphones from my childhood had that big button below the coin warning lamp. What was that button for?
[edit] Answered, from
https://whrl.pl/Rfii4lCollect Button
Both CT3 and CT3(1) allow users to make operator assisted calls. Coins are inserted under instruction from the operator and tones sent forward from the telephone allow the operator to count the money deposited. When the required amount is deposited the operator instructs the user to press the coin collect button.
The coins drop to the coin tin and a collect tone is sent to the operator. On receipt of this tone the operator connects the call through.
In the older type of coin telephones it was necessary to operate the collect button on local calls when the called party answered. Unfortunately, many users carried this practice of pressing the collect button on answer to local and STD calls from CT3. If the user presses the collect button of a CT3 at answer, but before receipt of the answer meter pulse, the call will be force released because no coins will be held in the mechanisms when the answer meter pulse is received. In addition, the user loses all coins deposited in the instrument which is especially annoying if a number of coins have been inserted for an STD call.
To overcome this misoperation, a dial pulse analyser in CT3(I) checks that an operator code (01) is dialled before allowing the collect button to be effective. This analyser facility can be strapped out in the few instances where CT3{I) is connected to exchanges with operator prefixes other than 01, and in these instances the collect button will be effective only until CIS or an answer meter pulse is received.