I ended up finding the Ir blasters in my basement. They work ok, but I would still like the Serial Port. I spoke with a cox representative and he explained it was an economic decision. If I really wanted it I should get my friends together to tell cox "hey please turn on the feature that costs $.20." I signed up for cox digital cable specifically for the serial port. When I find the right person at Cox I plan on explaining I could pay $45 a month for basic, which I know will work with Tivo, or pay $110 for digital (and rent their box). As best I can tell the DCH series boxes were released in 07/07 to meet the requirements of "707." Somehow I ended up on a whitepaper for one and...that was way over my head. I found the IrBlaster worked with a Motorola type Digital Cable box using "005" style channels AND pressing "Enter." I think without enter would work too, but I did it just so it changes quicker.