TRENDnet TFM-561U 56K USB 2.0 Phone, Internet and Fax Modem?

Hi,

I am shopping for an external modem and wanted to know if anyone is aware if this modem is supported 100% with free software and what it USB ID might be:
TRENDnet TFM-561U 56K USB 2.0 Phone, Internet and Fax Modem

I didn't find it in h-node.org.

I am aware of ThinkPengin's offering, but I need to propose several different choices.

Thanks in advance for any information.