FYNALlY YOUR PROBLEM WAS OVER !!
Rockwell k56flex plug & play modem, is not a rockwell modem, it is a
Acer Netxus AMI-RA05 56k ISA Modem that has a rockwell chipset RCVDL56ACF/SP R6761-21 and the FCC ID and FCC REG 5DOTAI-32221-M5-E / NBLAMIRA05S.
Itīs so hard to find !!!
Get it and have fun !!
Good Luck Guys !!
E-mail me if you have problems or doubts...