Too bad you omitted the make/model of the laptop. It would be a shame to work hard and repeat other people's efforts.
I'll share I use either a RS232 (serial) or USB modem since laptop internal modems are hit or miss (mostly miss.)
The internal modem of my recently purchased laptop (Modem type - 'HD audio soft DATA fax modem with smart CP') could not be configured in dial-up mode in Ubuntu 6.06 version. I have tested different types of linux i.e.Fedora core 1/Fedora core 5/Debian latest version etc. The modem works perfectly in Windows XP pro with SP2. Kindly suggest a solution for this. I could access the internet through dial up mode only in my place.
Check the info in this link
particulary info from azz.
Oldie but a goodie.
Cameras that make great holiday gifts
Let them start the new year with a step up in photo and video quality from a phone.