Some modems have several PNP devices. For example some modems contain both a DMA channel speakerphone device and a modem. Each device has its own PNP ID. If the device has no defined driver or resource in Win95 (in this case the DMA speakerphone device), place the second or additional unused modem ID strings in a special INF called NODRIVER.INF which effectively makes that "driverless device" accounted for in the Windows 95 registry.
[Boca]
%*BRI0200.DeviceDesc%=NODRIVER,*BRI0200
[NODRIVER]
[ControlFlags]
ExcludeFromSelect=*BRI0200
[Strings]
Msft="Microsoft"
NoneName="Other detected devices"
BocaMfg="Boca Research"
*BRI0200.DeviceDesc="Boca Complete Office Communicator (Audio)"
[Modem12.PosDup]
*PNP0500
%Modem12% = Modem12,, UNIMODEM6A25C644 ; Boca Complete Office Communicator
%Modem12% = Modem12, ISAPNP\BRI0A49_DEV0000 ; Boca Complete Office