Two cards were tested, they have the same lspci output and don't bring up any kernel modules.

lspci -vvnnk

03:02.0 Communication controller [0780]: Rockwell International HCF 56k Data/Fax/Voice/Spkp (w/Handset) Modem [127a:1025] (rev 01)
        Subsystem: Rockwell International HCF 56k Data/Fax/Voice/Spkp (w/Handset) Modem [127a:1025]
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 32
        Interrupt: pin A routed to IRQ 15
        Region 0: Memory at febf0000 (32-bit, non-prefetchable) [size=64K]
        Region 1: I/O ports at ec00 [size=8]
        Capabilities: [40] Power Management version 2
                Flags: PMEClk- DSI+ D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold-)
                Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-