Any Cisco boxes that I've dealt with have required the good old 1x2 splitters for clock stretching.

FYI, if you know the job requires a cable box, start putting that additional costs for these 1x2's may be needed in your assumptions/statements. That way when the stuff gets delivered to site, you won't have a client biatch at you for sending them a change order for them.

Also, depending on provider (we have Comcast), I'll tell the tech to turn around and put that Cisco crap back on the truck. I've had nothing but issues with those boxes. They're extremely slow and buggy.