Error 0x00EF00B5

Value: 15663285 | 0x00EF00B5 | 15663285

What does it mean ?

RTC_E_STATUS_INFO_CALL_FORWARDING  
Call Is Being Forwarded
Value: 181 | 0x00B5 | 0b0000000010110101

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