56K internal modems

[Paulo Henrique Baptista de Oliveira <baptista@cos.ufrj.br>]

    Hi all,
    here at Brazil is very difficult to find a 56K internal modem that
is not Winmodem.
    I want to buy an internal 56k modem (external are expensives) but
cant find a model.
    Anyone with a real 56k internal modem can give me your specification
of model & etc?
    Is there 56kbs USRobotics real modems? If so, what is the
specification?
    Thanks a lot,        Paulo Henrique