Error 0x80EF025B

Value: -2131819941 | 0x80EF025B | 2163147355

What does it mean ?

RTC_E_STATUS_GLOBAL_DECLINE  
Decline
Value: 603 | 0x025B | 0b0000001001011011

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