AT&T Long Lines

AT&T Long Lines was a telecommunications service provider that operated a vast network of long-distance and international communication lines across the United States and beyond. Using dedicated telephone and microwave relay systems, it enabled rapid voice, data, and fax transmission over long distances, especially before the widespread use of the internet. Established in the mid-20th century, Long Lines was essential for government, military, and commercial communications, forming the backbone for transcontinental connectivity. Its infrastructure included large, secure facilities and extensive cable and microwave links, playing a key role in enabling reliable, high-capacity communication across the country.