Error 0x80EE0012

Value: -2131886062 | 0x80EE0012 | 2163081234

What does it mean ?

RTC_E_INVALID_SIP_URL  
The SIP URL is not valid
Value: 18 | 0x0012 | 0b0000000000010010

Where does it come from ?

FACILITY_RTC_INTERFACE  
RTC - Real-time Communications
Value: 238 | 0x0EE | 0b11101110

Other Errors for FACILITY_RTC_INTERFACE