Hello,

I am developing one TAPI application using US Robotics Voice modem. The TSP I am using is the Unimodem Service Provider in
Windows.
If I compile my program in Windows 95 and run it gives an error as Operation Unavailable(LINEERR_OPERATIONUNAVAIL). But
if I use Windows 98 for
the same, it is running properly. Is there any difference in TSP between Windows 95 and 98 ? But some programs from Dialogic are
running even in Windows 95? What
is the solution for this problem ?