spare 500 bucks for them as it is essential to get your line checked for data transfer capabilities. if you do not want that option will put you in jeopardy as they will not check the line and you may not be able to get online.
my friend got the same trouble and then he had to call them back and they found his line was not proper they rectified it and then he was able to get online.
our copper cables are good for voice but if they slightest of grounding, earthing or some damage to the cable it will not let the data circuit from your pc to exchange complete and may cause troubles, so it is better to get it installed by them.
i am too waiting for my conn and i may get next week or so.