Supported TAPI operations

The driver offers the following TAPI call control operations.
SIP devices do not support all the features listed here.

Action:	Corresponding TAPI function:
Dial	TSPI_lineMakecall
Hang up	TSPI_lineDrop
Answer call	TSPI_lineAnswer
Hold call²	TSPI_lineHold
Retrieve call²	TSPI_lineUnhold
Redirect call	TSPI_lineRedirect
Blind transfer²³	TSPI_lineBlindTransfer
Setup transfer²	TSPI_lineSetupTransfer
Swap hold²	TSPI_lineSwapHold
Complete transfer²	TSPI_lineCompleteTransfer (LINETRANSFERMODE_TRANSFER)
Create conference²	TSPI_lineCompleteTransfer (LINETRANSFERMODE_CONFERENCE)
Add to conference²	TSPI_lineAddToConference
Remove from conference²	TSPI_lineRemoveFromConference
Pickup²	TSPI_linePickup
DTMF dialing²	TSPI_lineGenerateDigits
Dial in dial tone mode	TSPI_lineDial
Forwarding	TSPI_lineForward TSPI_lineGetAddressStatus LINEFORWARDMODE_UNCOND LINEFORWARDMODE_UNCONDEXTERNAL² LINEFORWARDMODE_UNCONDINTERNAL² LINEFORWARDMODE_BUSY² LINEFORWARDMODE_BUSYEXTERNAL² LINEFORWARDMODE_BUSYINTERNAL² LINEFORWARDMODE_NOANSW² LINEFORWARDMODE_NOANSWEXTERNAL² LINEFORWARDMODE_NOANSWINTERNAL²
Do not disturb²	TSPI_lineForward TSPI_lineGetAddressStatus
Message waiting²	TSPI_lineSetLineDevStatus TSPI_lineGetLineDevStatus

²These functions are not supported by SIP phones.
³ Emulated by the driver (System does not natively support this feature)

The following TAPI functions are implemented due to requirements of the TAPI subsystem.

Other functions exported by the driver:
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