In addition, the channel was used in the past as an overflow feed for regional sports network Comcast SportsNet Chicago (now NBC Sports Chicago; branded technically as CSN+ in order to alleviate sports overflows with CSN Chicago's properties). CLTV was also used during the existence of SportsChannel and Fox Sports Net Chicago as the overflow feeds of those channels before the launch of CSN Chicago. By the second quarter of 2010, Comcast's Chicago systems transitioned to digital-only transmission of its channel lineup (requiring a digital converter box or CableCard-compliant receiver to receive programming), and NBCSC+ has been transitioned to its own channel, along with a NBCSC+HD feed.