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Vintage Telephony and Telecomms Vintage Telephones, Telephony and Telecomms Equipment

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Old 28th May 2011, 12:21 am   #1
3D2BA Dick
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Join Date: Apr 2011
Location: Sigatoka, Fiji.
Posts: 16
Default Button A - B coin boxes

Seeing reference to the old A - B coin boxes, I recalled methods of defeating the system.

The first was called back-dialling and for this, great skill was required. First deduct one
didget from each digit in the number so that 64238 would become 53127. Then, with
finger in the 0 hole and handset still on the 162 tele, rotate to the finger stop. Then, with
handset off, allow the dial to go back to the 5 then return to finger stop. Then back to the
3 and back to the finger stop. Repeat fior all digits. Pause for a couple of secs after the
last digit and then let the dial return to the rest position. The skill lay in going back at the
10 ips speed and remembering that you are obscuring the number you have to stop at !
The unavoidable 0 at the end didn't matter as the final selector would by now be at rest
and sending ringing current..

In case someone asks, a 1 was dialled by going back to a spot just before 1. Very tricky !

The second method was much easier and needed a small cork from a medicine bottle or
similar. This needed to be shaped to fit into the 0 hole and have a flange of about 1/8".
This was put into the 0 and zero dialled with the handset on. Then pick up and dial in the
usual way with the correct numbers. Do not forget to remove cork before leaving .

Both methods relied on opening the off-normal contacts which ordinarily shorted the
impulsing contacts and prevented dialling. The microphone wasn't shorted as no money
had been inserted !
3D2BA Dick is offline  
Old 28th May 2011, 11:56 am   #2
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Default Re: Button A - B coin boxes

Most ingenious, I understand the reason for doing such things, one of my hobbies is picking locks.
 
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