Someone feel free to jump in if I've got this wrong,
I believe you have very little chance of getting that modem to work with SME in particular, although the ltmodem project has had a lot of sucess getting winmodems working under many linux distributions.
The challenge you face specifically to SME is as follows,
There is no built-in support for internal analog modems, they should be external and connect to a serial port.
The only internal dialup-type card supported is the digital (ISDN) card, a good example being the AVM Fritz. (although it has issues with SME 5.6, requiring expanding modules.conf occasionally for some weird reason or it loses the card definition.)
The only other option for a home user is ethernet connected to broadband/cable, I have also had success using a D-Link DSL 300G+ for this.
Hope this helps guide you on your way,
Best Regards
P.S. Putty is good, but in conjunction with WINSCP2 its deadly!!