Oklahoma-based Pioneer Telephone Cooperative, one of the largest telephone cooperatives in the nation with over 56,000 access lines, is using the Calix C7 ultra-broadband loop carrier (UBLC) to deploy switched video services over ultra-broadband DSL. Calix said its list of active video customers now includes Champaign Telephone Company; Genuine Telecom; MBO Corporation; Panhandle Telephone Cooperative, Inc.; Pioneer Telephone Cooperative; Ringgold Telephone Company; Skyline Telephone Membership Corporation; South Slope Cooperative Communications; Valley Communications. in South Dakota; and Winnebago Cooperative Telephone Association. http://www.calix.com