Wagpsych,
As long as your TiVo is tuning adapter certified you'd want the required # of cable cards and a tuning adapter for each. As far as I can tell from the TiVo website, the series 4 is a Premier and would require 1 M-Card.
This article will help. http://ww2.cox.com/residential/support/tv/article.cox?articleId=b8889a60-d706-11df-66a2-000000000000
As long as your TiVo is tuning adapter certified you'd want the required # of cable cards and a tuning adapter for each. As far as I can tell from the TiVo website, the series 4 is a Premier and would require 1 M-Card.
This article will help. http://ww2.cox.com/residential/support/tv/article.cox?articleId=b8889a60-d706-11df-66a2-000000000000