Now, I say 'nationally', but I'm not really sure that's the case. For instance, 23 games will be televised on French-language networks: RDS leading the way with 20, while their affiliate network RIS has three. In English, there will be 18 games on CBC, ten on TSN, and two on TSN2. Naturally, no Sens games will be telecast on Versus or NBC, because Americans have no desire to watch the Senators at all (sorry, Mark). (Also, these televised games add up to more than 43 because some games are broadcast on both English and French-langauge networks.)
Hopefully Sportsnet, Rogers, or some other local networks pick up the remaining 39 games in the season schedule.