fireTEK system has been been providing this capability for many years.
fireTEK can directly receive and generate timecode.
Both the FTM Controller and the FTH and FTQ modules can be configured with timecode. Not only does this allow unlimited number of cues it allows you to easily synchronize with other systems while maintaining control through the fireTEK system and minimize equipment. (The picture below also shows the external USB A drive for the internal fireTEK audio player)
The new FTQ modules can receive and also generate timecode
The RCA jack for the Timecode interface is located below the USB Port