sentences:  Comcast, owners of the league's current cable partner NBCSN, is also the largest cable television provider in the United States.The company was contractually obligated to carry NHL Network on its systems by the summer of 2007 at the latest, so it would be available in time for the 2007–08 NHL season.Both Comcast and the NHL had an option to terminate their contract after the 2006–07 season, which would have voided Comcast's obligation to launch a U.S. version of NHL Network, but opted to proceed with the launch.