Error 0x80EF019A

Value: -2131820134 | 0x80EF019A | 2163147162

What does it mean ?

RTC_E_STATUS_CLIENT_GONE  
Gone
Value: 410 | 0x019A | 0b0000000110011010

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