https://www.cnet.com/news/lobby-representing-at-t-verizon-wants-fcc-to-get-rid-of-line-sharing-rules/

A lobby group representing AT&T, Verizon and other telecommunications companies wants the government to stop imposing rules that allow smaller network operators to buy access at lower rates to the networks of companies currently in control. 

In 2005, the Federal Communications Commission killed off several line-sharing requirements. But incumbent telecommunications companies still have to make certain copper-based network elements available through wholesale at regulated prices, Ars Technica reports.