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TAPI_E_INVALTIMEOUT
What TAPI_E_INVALTIMEOUT means
TAPI_E_INVALTIMEOUT The timeout supplied to the telephony operation is outside the valid range or is otherwise unsupported by the provider.
What to check
- Record the timeout value and its unit at the native TAPI boundary.
- Check whether the API treats zero, an infinite value, or a provider-specific maximum specially.
- Verify that a wrapper did not convert milliseconds, seconds, or signed values incorrectly.
Handling
Pass a timeout documented for the operation and provider. If the timeout is computed, clamp or validate it before entering TAPI rather than retrying the rejected request.
References
- Microsoft: TAPI_E constants — official Microsoft documentation used to interpret the HRESULT.
- Microsoft: TAPI 3.1 Reference
- Microsoft: Telephony API interfaces
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