Wireless Carriers Move to New Technology—for Voice
By THOMAS GRYTA U.S. wireless carriers are working on a new way to deliver voice calls to make their networks more efficient. While carriers have spent tens of billions of dollars developing and marketing their data networks, wireless voice calls still use technology rolled out more than 10 years ago. Older networks were built for voice traffic with a data pipe running through it, but newer networks are for data only. To maximize efficiency, carriers aim to eliminate the dedicated voice channels needed by older technology and clear the airwaves for the latest standard, called long-term evolution, or LTE. To do this, companies are taking on the multiyear process of converting voice calls into Internet traffic so the same airwaves can be used for voice or data. "As an industry, we spent 20 years building for voice capacity and 10 years fixing it that so that it would work for mobile data," said John Byrne, an...