I use the modem occasionally when I'm travelling. It's connected to most ISP's, but I've had some trouble when connecting to specific long distance servers.
Dell Picking Slip
Internal 56K Modem
Linux identified as (lspci)
0000:00:1f.6 Modem: Intel Corp. 82801EB/ER (ICH5/ICH5R) AC'97 Modem Controller (rev 02)
copyright 2004, 2005 Iain Buchanan