Error 0x00EF00C8

Value: 15663304 | 0x00EF00C8 | 15663304

What does it mean ?

RTC_E_STATUS_SUCCESS  
OK
Value: 200 | 0x00C8 | 0b0000000011001000

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