The following table shows the TSPI callback with a description of the purpose of each.
| Programming element | Description |
|---|---|
| ASYNC_COMPLETION | Implemented by TAPI and supplied to the service provider as a parameter to the TSPI_providerInit function. |
| LINEEVENT | Implemented by TAPI and supplied to the service provider as a parameter to the TSPI_lineOpen function. |
| PHONEEVENT | Implemented by TAPI and supplied to the service provider as a parameter to the TSPI_phoneOpen function. |
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