USB controller external modem

[j.e.drews at att.net]

Hi:

 Can anyone recommend an USB external modem, that is controller based? I have 
looked at the FreeBSD laptop compatibility list and found none. I have also
done a considerable amount of googling and only found ones that attach through
and RS232 cable. My laptop does not have that. I am running FreeBSD 5.2 Current
and want to use umodem.

                               TIA
                               Jonathan