The TSPI allows extended functionality through the lineDevSpecific command.
Note:
This is only available in the licensed version of the TAPI driver.
The TAPI lineDevSpecific function takes a buffer and passes that buffer, unmodified, through to the TSP where it is interpreted as a device-specific function.
LONG
WINAPI
lineDevSpecific(
HLINE hLine,
DWORD dwAddressID,
HCALL hCall,
LPVOID lpParams,
DWORD dwSize
);
