AT&T Inc has started trials in Georgia state and a non-U.S. location to deliver high-speed internet over power lines, the wireless carrier said on Wednesday.

AT&T aims to eventually deliver speeds faster than the 1 gigabit per second consumers can currently get through fiber internet service using high-frequency airwaves that travel along power lines.

AT&T said it had no timeline for commercial deployment and that it would look to expand trials as it develops the technology.

AT&T and Verizon Communications Inc, the largest U.S. wireless carrier, have also been testing 5G internet services in which the last leg of the connection is delivered via a radio signal to homes using high-frequency airwaves known as millimeter wave spectrum.

Verizon said in November it would launch the faster broadband service in three to five U.S. markets in 2018.