TSPI_lineSetCallParams (Compact 2013)
3/26/2014
This function sets certain parameters for an existing call.
Syntax
LONG TSPIAPI TSPI_lineSetCallParams(
DRV_REQUESTID dwRequestID,
HDRVCALL hdCall,
DWORD dwBearerMode,
DWORD dwMinRate,
DWORD dwMaxRate,
LPLINEDIALPARAMS const lpDialParams
);
Parameters
- dwRequestID
Identifier of the asynchronous request.
- hdCall
Handle to the call whose parameters are to be changed. The call state can be any state except idle and disconnected.
- dwBearerMode
New bearer mode for the call. The dwBearerMode parameter can have only one of the LINEBEARERMODE constants.
- dwMinRate
Lower bound for the call's new data rate. TAPI can accept a new rate as low as this one. TAPI does not validate this parameter when this function is called.
- dwMaxRate
Upper bound for the call's new data rate. This is the maximum data rate TAPI would like. Equal values for dwMinRate and dwMaxRate indicate that an exact data rate is required. TAPI does not validate this parameter when this function is called.
- lpDialParams
Pointer to the new dial parameters for the call, of type LINEDIALPARAMS. If this parameter is NULL, it indicates that the call's current dialing parameters are to be used.
Return Value
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. The following table shows the return values for this function.
Value |
Description |
|---|---|
LINEERR_INVALCALLHANDLE |
The handle to the call is invalid. |
LINEERR_RATEUNAVAIL |
The rate is unavailable. |
LINEERR_INVALCALLSTATE |
The call state is invalid. |
LINEERR_NOMEM |
Not enough memory is available. |
LINEERR_INVALBEARERMODE |
The bearer mode is invalid. |
LINEERR_OPERATIONUNAVAIL |
The operation is unavailable. |
LINEERR_INVALPOINTER |
The pointer is invalid. |
LINEERR_OPERATIONFAILED |
The operation failed. |
LINEERR_INVALRATE |
The rate is invalid. |
LINEERR_RESOURCEUNAVAIL |
The resource is unavailable. |
LINEERR_BEARERMODEUNAVAIL |
The bearer mode is unavailable. |
Remarks
This operation is used to change the parameters of an existing call. Examples of its usage include changing the bearer mode and/or the data rate of an existing call.
Requirements
Header |
tspi.h |
Library |
CellTSP.dll |