Nortel Networks Corp. and Qualcomm Inc. have completed a trial demonstrating an uninterrupted voice call when switching from a traditional cellular network to a wireless LAN. The two companies say this is a major step towards delivering out-of-the-box voice call continuity (VCC) when going from one type of wireless network to another. According to a news release, VCC can reduce mobile phone charges by allowing cell phones to operate on Wi-Fo networks. "Airtime and long distance charges do not apply when the user roams into areas of WiFi coverage – which can be in the home, office or some public retail locations," reads the release.