Error 0x8004001B

Value: -2147221477 | 0x8004001B | 2147745819

What does it mean ?

TAPI_E_INVALRATE  
Invalid rate.
Value: 27 | 0x001B | 0b0000000000011011

Where does it come from ?

FACILITY_ITF  
COM/OLE Interface management. FACILITY_ITF is designated for user-defined error codes returned from interface methods
Value: 4 | 0x004 | 0b00000100

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