VHC has an active district court case with multiple defendants, including Apple, Cisco, Siemens, Mitel, NEC, etc. The ITC complaint made by VHC is only against Apple.
Unlike VHC, IDCC's parallel district case is stayed pending the ITC outcome.
From my understanding, ALJ's at the ITC usually do the claim constructions at trial and not in a separate, earlier Markman hearing.