Iremember doing exactly this kind of hack for a small telco in Bueno Aires. Extel. Around the year 2000.
In most cases it was not much more difficult than what OP described.
Iremember doing exactly this kind of hack for a small telco in Bueno Aires. Extel. Around the year 2000.
In most cases it was not much more difficult than what OP described.
I worked on some software that was used by telcos around that time - you were probably hacking our dongles :)
Even more amazingly - that software I worked in is still being used and sold. Probably still has some of my ropey old code on it…