Why don`t modems say which widows system they are compatible with? ty

99% of modems will work with any Windows systems up to windows 7. The only exception to that is some don't work on 64 bit systems and some newer modems won't work with older windows systems.

Questions & Answers: DIAMOND SM56PCILEWB SupraMax PCI LE Fax Modem

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DIAMOND SM56PCILEWB SupraMax PCI LE Fax Modem 56Kbps PCI Bus (Plug & Play) Fax: ITU-T; Group 3: V.17, V.29, V.27ter, V.21 Data: ITU-T; V.92, V.90, V.34, V.32bis, V.32, V.23, V.22bis and V.21; Bell 212A and 103 Compression: V.44, V.42bis, MN

56Kbps
PCI Bus (Plug & Play)
2 x RJ11 ports
Fax: ITU-T; Group 3: V.17, V.29, V.27ter, V.21 Data: ITU-T; V.92, V.90, V.34, V.32bis, V.32, V.23, V.22bis and V.21; Bell 212A and 103 Compression: V.44, V.42bis, MNP5 Error Control: V.42, MNP 2-4, MNP10

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