Accessing NFL Redzone when away from home. - TimeWarner TV

My husband travels on Sundays. He tried to log in and watch NFL redzone on Sunday and the channel was not available away from home. He then went to the NFL website and it says you can log in with your Spectrum ID and watch it but that did not work either. Other companies, like Verizon, make this available for their customers and it really is annoying to not be able to access channels that you pay for.