Suggestion for good 56K modem for Linux

Hi,

Could you guys suggest me a good and less expensive modem for Linux? As far
as online I researched, I was suggested to get any hardware modem.

I already have a modem which Kudzu says as 'Intel Corp. | DSVD modem'. Since
I pulled it out of my closet, I really don't know anything more than that.
But, all I know is wvdialconf doesn't see it once I log in.

Any help is appreciated.

Sundar