sentences:  WPON went silent in October 2010 so improvements could be made to its signal with WPON's programming continuing on WCXI.The WCXI calls were used in Detroit from the late 1970s to the early 1990s at what is now WDFN 1130 AM, and also in the early 1980s as WCXI-FM at 92.3 FM (now WMXD).It has also been used at what was previously and is now WIBM 1450 AM in Jackson, Michigan.