said by DavidEBSmith:
Thinking about switching from awful AT&T DSL to Comcast HSI. We already have Comcast TV and an outlet close enough to where the modem would be. Will Comcast want to send an installer out to install the HSI, or will they let me do it myself?...
I was in that same situation, but with a different DSL provider. Comcast sent me an HSI self-install kit. It contained the modem, a couple of cables for the coax (one about 4 or 5 feet, the other around 12 feet long), a splitter to insert into the incoming feed, plus instructions.
This was a few years ago, I would presume that Comcast continues to allow self-installs of HSI.