AT&T Inc., the largest phone company in the U.S., has taken a more conservative approach to optical fiber, building it out to neighborhoods but not all the way to homes. The Internet signal is still carried the last stretch, into the home, on a phone line. This build-out is less costly than Verizon's, but doesn't let AT&T compete with the fastest cable connections.The Associated Press's tally of reports from the eight largest phone companies in the U.S. shows they collectively lost 70,000 broadband subscribers in the April-to-June period. Meanwhile, the top four public cable companies reported a gain of 290,000 subscribers. AT&T accounted for the bulk of the loss â¿¿ 96,000 subscribers â¿¿ while other companies on average added a few thousand subscribers. The second quarter is a traditionally weak one for all broadband providers, since college students cancel their subscriptions before heading home for the summer. The phone companies have lost subscribers once before, two years ago. That also was during the second quarter, and the loss then was 1,600 subscribers. The picture for phone companies is less dire when considering the last 12 months, a period during which they added nearly 600,000 subscribers. However, cable companies added more than three times as many. Phone companies were closing the gap with cable around 2005 to 2007 by adding more subscribers, but have been lagging since then, according to Leichtman Research Group. Now, the major phone companies have 34.7 million subscribers to cable's 45.7 million, the research firm says. Analyst Craig Moffett at Sanford Bernstein called the decline in broadband a "body blow" to phone companies, which have been using broadband to offset a long-running loss of subscribers to regular phone service. Now, both are declining, he noted. Susan Crawford, a professor at Cardozo Law School in New York and a former assistant to President Obama on telecommunications, has argued that a looming cable monopoly in three-quarters of the country is "the central crisis of our communications era." She suggests that the U.S. follow the example of countries that have forced cable providers to allow other companies provide Internet service over their cables. The service-providers would compete with each other and provide some choice to the consumer, she says.