posted 19 years ago
Quite simple in fact. There's a computer (telephone switch) somewhere in your own country that takes the incoming calls and forwards them to the overseas callcenter.
There the incoming calls are then forwarded to the correct room/person/department based on the company that forwarded them the call so someone calling Dell customer support doesn't get surprised by someone answering the phone with "Wallmart customer services, how i can help u?".
Many callcenter companies in cheap labour countries take calls for dozens if not hundreds of customer companies in several countries...