the country. The country's telecommunications agency, the Federal Telecommunications Institute (IFT), also mandates that direct-broadcast satellite providers carry the signals of stations that are part of television networks that cover 50% of the Mexican territory, albeit with regional lockouts for advertisements. Radio superstations The first radio station in North America to achieve superstation distribution via satellite was Chicago's WFMT (98.7 FM), a classical music station that was uplinked by United Video to the Satcom I satellite in May 1979, which began distributing its signal via satellite as a cable radio feed throughout the United States and was also distributed in over two dozen countries overseas (including the Soviet Union and China). Like with fellow United Video-distributed superstation WGN-TV in that same market during its early years as a cable superstation, other than some limited revenue from a scant number of national advertisers, WFMT earned no extra revenue from its expanded distribution. (Incidentally, WFMT was co-owned with WGN-TV from 1968 until 1970, when WGN Continental Broadcasting donated the WFMT assets to the Chicagoland Educational Television Association, owner of local PBS station WTTW [channel 11].) WSM (650 AM) in Nashville, Tennessee, also received a lot of attention in the 1980s through its distribution via C-band alongside The Nashville Network (which was co-owned with WSM radio at the time through Gaylord Entertainment). Very few stations actually distribute themselves through C-band, as the station's audio can now more easily be dialed in through either ISDN lines, or listened to via an audio stream over the internet (if the station offers such a service). Radio stations that relay their audio feed via C-band, like WEEI-FM (93.7) in Boston, often do so to feed the signal to others that simulcast the programming throughout the New England region. This is the case with several stations in Mexico, as radio and television broadcasting in that country is very nationalized and most local stations merely act as 24-hour-a-day affiliates of a national network. Some local radio stations are, or have been distributed on satellite radio throughout the United States, and Canada in select cases. Stations that have previously maintained distribution over satellite radio have included WLTW (106.7 FM) in New York City, KHMX (96.5 FM) in Houston, KIIS-FM (102.7) in Los Angeles, KNEW (960 AM) in San Francisco, WTKS-FM (104.1) in Orlando, WLW (700 AM) in Cincinnati and WSIX-FM (97.9 FM) in Nashville on XM Satellite Radio, and WSM