Error 0x80EF0193

Value: -2131820141 | 0x80EF0193 | 2163147155

What does it mean ?

RTC_E_STATUS_CLIENT_FORBIDDEN  
Forbidden
Value: 403 | 0x0193 | 0b0000000110010011

Where does it come from ?

FACILITY_SIP_STATUS_CODE  
SIP - Session Initiation Protocol (VoIP)
Value: 239 | 0x0EF | 0b11101111

Other Errors for FACILITY_SIP_STATUS_CODE