Error 0x80EF012D

Value: -2131820243 | 0x80EF012D | 2163147053

What does it mean ?

RTC_E_STATUS_REDIRECT_MOVED_PERMANENTLY  
Moved Permanently
Value: 301 | 0x012D | 0b0000000100101101

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