Free enterprise in Argentina had different companies doing different things.
20 years ago, an AT&T phone, a GTE phone, a Stromberg-Carlson phone, a North Electric phone etc., etc. all had different characteristics. It took us 10 years to get truly compatible transmission characteristics. The "mini plug" still is a Western Electric patented device and not all Telcos supported it. In Europe, you need an extra suitcase for the plugs if you travel with your laptop, for much the same reasons. Unless some government regulates on this issue or unless it becomes commercially unviable to have differences, there will be differences. Ciao, Vic
