TSPI_lineBlindTransfer (Compact 2013)
3/26/2014
This function performs a blind or single-step transfer of the specified call to the specified destination address.
Syntax
LONG TSPIAPI TSPI_lineBlindTransfer(
DRV_REQUESTID dwRequestID,
HDRVCALL hdCall,
LPCWSTR lpszDestAddress,
DWORD dwCountryCode
);
Parameters
- dwRequestID
Identifier of the asynchronous request.
- hdCall
Service provider's handle to the call to be transferred. The call state of hdCall can be connected.
- lpszDestAddress
Pointer to a null-terminated Unicode string identifying where the call is to be transferred. The destination address uses the standard dialable number format.
- dwCountryCode
Country/region code of the destination. The implementation should use this to select the call progress protocols for the destination address. If a value of zero is specified, the service provider should use a default. TAPI does not validate dwCountryCode when this function is called.
Return Value
Returns dwRequestIDor 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. The following table shows the return values for this function.
Value |
Description |
|---|---|
LINEERR_INVALCALLHANDLE |
The handle to the call is invalid. |
LINEERR_NOMEM |
Not enough memory is available. |
LINEERR_INVALCALLSTATE |
The call state is invalid. |
LINEERR_OPERATIONFAILED |
The operation failed. |
LINEERR_ADDRESSBLOCKED |
The address is blocked. |
LINEERR_RESOURCEUNAVAIL |
The resource is unavailable. |
LINEERR_INVALCOUNTRYCODE |
The country/region code is invalid. |
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.
Requirements
Header |
tspi.h |
Library |
CellTSP.dll |