More information and images here: https://personal.garrettfuller.org/blog/att-long-lines/central-office-jefferson-city-mo/

This site served as the Central Office (CO) for Jefferson City. The KS-15676 horns formerly located on top of the building have long been removed. This site had cable connections to Knob Noster and Kingdom City. The site is now owned by CenturyLink, a descendent of one of the Baby Bells. The site was originally operated by the Southwestern Bell RBOC.