For Wake Forest, it started in 2007, when Forsyth County and the City of Winston-Salem
As the system was used, however, gaps in radio coverage began to appear on campus and became more apparent daily, particularly when the radios were used indoors. Many of the school’s concrete and brick buildings were impenetrable by the 800 MHz radio waves, so the radios were often inadequate when the officers found themselves needing to use their portables indoors.
To solve the problem, Wake Forest investigated having their own radio system, however they did not want to give up access to the regional 800MHZ service.
An article here in Campus Safety Magazines describes the innovative solution – from Catalyst, of course!