The driver offers the following TAPI call control operations.
| Action: | Corresponding TAPI function: | 
|---|---|
| Dial | TSPI_lineMakecall | 
| Hang up | TSPI_lineDrop | 
| Answer call | TSPI_lineAnswer | 
| Hold call | TSPI_lineHold | 
| Retrieve call | TSPI_lineUnhold | 
| Redirect call | TSPI_lineRedirect | 
| Blind transfer² | TSPI_lineBlindTransfer | 
| Setup transfer | TSPI_lineSetupTransfer | 
| Swap hold | TSPI_lineSwapHold | 
| Complete transfer | TSPI_lineCompleteTransfer (LINETRANSFERMODE_TRANSFER) | 
| Create conference | TSPI_lineCompleteTransfer (LINETRANSFERMODE_CONFERENCE) | 
| Add to conference | TSPI_lineAddToConference | 
| Remove from conference | TSPI_lineRemoveFromConference | 
| Callback busy | TSPI_lineCompleteCall (LINECALLFEATURE2_COMPLCALLBACK) | 
| Pickup | TSPI_linePickup | 
| DTMF dialing | TSPI_lineGenerateDigits | 
| Dial in dial tone mode | TSPI_lineDial | 
| Forwarding | TSPI_lineForward TSPI_lineGetAddressStatus | 
| Do not disturb | TSPI_lineForward TSPI_lineGetAddressStatus | 
| Message waiting | TSPI_lineSetLineDevStatus TSPI_lineGetLineDevStatus | 
Folgende weitere TAPI Funktionen sind bedingt durch Anforderungen des TAPI Subsystem implementiert.
| Weitere vom Treiber exportierte Funktionen: | 
|---|
| TSPI_lineSendUserUserInfo | 
| TSPI_lineClose | 
| TSPI_lineCloseCall | 
| TSPI_lineConditionalMediaDetection | 
| TSPI_lineDevSpecific | 
| TSPI_lineDevSpecificFeature | 
| TSPI_lineGetDevConfig | 
| TSPI_lineSetDevConfig | 
| TSPI_lineGetAddressCaps | 
| TSPI_lineGetAddressStatus | 
| TSPI_lineGetAddressID | 
| TSPI_lineGetCallAddressID | 
| TSPI_lineGetCallInfo | 
| TSPI_lineGetCallStatus | 
| TSPI_lineGetDevCaps | 
| TSPI_lineGetExtensionID | 
| TSPI_lineGetIcon | 
| TSPI_lineGetID | 
| TSPI_lineGetNumAddressIDs | 
| TSPI_lineNegotiateExtVersion | 
| TSPI_lineNegotiateTSPIVersion | 
| TSPI_lineOpen | 
| TSPI_lineSelectExtVersion | 
| TSPI_lineSetDefaultMediaDetection | 
| TSPI_lineSetStatusMessages | 
| TSPI_lineSetAppSpecific | 
| TSPI_lineSetCallData | 
| TSPI_providerCreateLineDevice | 
| TSPI_providerEnumDevices | 
| TSPI_providerFreeDialogInstance | 
| TSPI_providerGenericDialogData | 
| TSPI_providerInit | 
| TSPI_providerShutdown | 
| TSPI_providerUIIdentify | 
| TSPI_lineGetCallIDs | 
| TUISPI_lineConfigDialog | 
| TUISPI_lineConfigDialogEdit | 
| TUISPI_providerConfig | 
| TUISPI_providerInstall | 
| TUISPI_providerRemove | 
| TUISPI_providerGenericDialog | 
| TUISPI_providerGenericDialogData | 
Version ECSTA_4