xocemp

I think when you call this time they will be more than happy to have you on a modem.
Its very possible that you will be sent a modem, though as you pointed out you would need a splitter. A manned install is what you would need, perhaps one of the 1st line agents that post here may advise better. Its also possible you could have a quick start pack sent which contains a splitter a number of coax lengths and the modem.