TSPI_lineBlindTransfer

The TSPI_lineBlindTransfer function performs a blind or single-step transfer of the specified call to the specified destination address.

LONG TSPI_lineBlindTransfer(
  DRV_REQUESTID dwRequestID,  
  HDRVCALL hdCall,          
  LPCWSTR lpszDestAddress,  
  DWORD dwCountryCode       
);
 

Parameters

dwRequestID

The identifier of the asynchronous request.

hdCall

The service provider's handle to the call to be transferred. The call state of hdCall can be connected.

lpszDestAddress

A pointer to a NULL-terminated string identifying where the call is to be transferred to. The destination address uses the standard dialable number format.

dwCountryCode

The country code of the destination. This should be used by the implementation to select the call progress protocols for the destination address. If a value of 0 is specified, the service provider should use a default. dwCountryCode is not validated by TAPI when this function is called.

Return Values

Returns dwRequestID or an error number if an error occurs. The lResult actual parameter of the corresponding ASYNC_COMPLETION is zero if the function succeeds or an error number if an error occurs. Possible return values are as follows:

LINEERR_INVALCALLHANDLE, LINEERR_NOMEM, LINEERR_INVALCALLSTATE, LINEERR_OPERATIONUNAVAIL, LINEERR_INVALADDRESS, LINEERR_OPERATIONFAILED, LINEERR_ADDRESSBLOCKED, LINEERR_RESOURCEUNAVAIL, LINEERR_INVALCOUNTRYCODE.

Remarks

The service provider carries out no dialing if it returns LINEERR_INVALADDRESS.

Blind transfer differs from a consultation transfer in that no consultation call is made visible to TAPI. Typically, after the blind transfer successfully completes, the specified call is cleared from the line it was on and transitions to the idle state. The service provider's call handle must remain valid after the transfer has completed. TAPI causes this handle to be invalidated when it is no longer interested in the transferred call using TSPI_lineCloseCall.

See Also

ASYNC_COMPLETION, LINE_CALLSTATE, TSPI_lineCloseCall