I own two Asus touchscreen 2n1 Laptops with SD readers (model number Q503UA-BHI5T16) Currently on sale at Best Buy for 699 each which is a very good price. I also had an Asus ebook which I used in the field. I don't think you have much choice but to use a usb to serial adapter. I have had no trouble with an adapter. Very difficult if even possible to find one with a built in modem. I have found that most usb modems don't function well when connecting to phone system modems. That being said the one I own is is a HIRO modem and its quite cheap. A US Robotics or Zoom USB might work better. Newer phone systems don't use modems as much as a browser interface and that is a good thing considering that true point to point analog co lines are going away with most dialtone delivered per IP.

www.myrandomviews
"Old phone guys never die, they just get locked in some closet with an old phone system and forgotten about"

Retired, taking photographs and hoping to fly one of my many kites.