Below is an excerpt from a Slashdot comment on a July 18 thread about Comcast:
The key to working with Comcast is to have some basic technical knowledge of cable internet. Once you show you know the lingo and you know the basic technical aspects, you'll either get the support person to "talk up" to your level immediately or switch you to someone that knows. Most support people have at least heard some of the terminology, usually enough to know if they're in over their head and need to route you to someone else.
For example, if you buy your own modem, NEVER say "I need my new modem INSTALLED." Say "I need my new modem PROVISIONED". 95% of the support people will know right away what you need and won't bother asking you about Windows and you'll be online 15 minutes later.