1980 marked the completion of the upgrade of all exchanges to one-party service using all buried cable. In September 1983, the cooperative purchased the exchanges of Hooker and Forgan from Southwestern Bell Telephone Company. This acquisition increased subscriber number by 52% with 4,156 total subscribers in all exchanges. By May 1984, all of the Hooker subscribers enjoyed completely buried cable and private line service, and by June 1984, Forgan also had totally buried private line service completed. In an attempt to deal with the FCC's decision to deregulate the telephone industry, the cooperative formed a subsidiary early in 1983. Panhandle Telecommunication Systems, Inc. (PTSI) afforded the cooperative competitive avenues to sell business telephone systems, paging systems, and other associated telephone equipment. In 1985, PTSI purchased Telefast Answering Service, which proved to be a very successful business. Since PTSI's incorporation in 1985, it has continued to expand by offering such services as television, answering service, internet, paging, and cellular. In 1985, all PTCI exchanges were upgraded to digital switches allowing for enhanced features like Caller ID, Call Waiting, and Voice Mail. In 1987, the PTCI network completely converted to digital technology. In 1988, PTSI designed and built a digital video network for the Beaver County schools. The "Panhandle Shar-Ed Video Network of Beaver County" (PSVN) as it was called, provided full video-audio interaction between the four Beaver County high schools. It was one of the very first teaching systems of its kind in the United States utilizing fully digital facilities via fiber optic cable. PSVN eventually served most of the area high schools. On June 1, 1989, PTSI began carrying all of AT&T's long distance toll traffic out of the Oklahoma Panhandle. PTSI negotiated a five-year contract with AT&T to carry all their toll traffic via fiber optic cable to Amarillo, Texas, in conjunction with XIT Telephone Cooperative, which met PTSI's facilities at the Oklahoma-Texas state line. In June of 1989 PTSI entered the cellular telephone business. PTSI was one of three partners who were awarded RSA 2 in the Texas Panhandle. In August of 1989, PTSI was awarded RSA 1, becoming the primary cellular service provider in the Oklahoma Panhandle. In October 1989 the cooperative provided equal access of long distance carriers to all its subscribers. This was just another step in providing telecommunications services to our subscribers like those available to telephone users in metropolitan areas of the country.