Cisco and Motorola are not interested in this market, and Lucent is no longer American. To answer your question: maximizing shareholder value is why there are n

Cisco and Motorola are not interested in this market, and Lucent is no longer American. To answer your question: maximizing shareholder value is why there are no US vendors (that in turn, might be because of lack of competition behavior between Verizon and AT&T leading to lowered investment in infrastructure)