Error 0x00EF00B6

Value: 15663286 | 0x00EF00B6 | 15663286

What does it mean ?

RTC_E_STATUS_INFO_QUEUED  
Queued
Value: 182 | 0x00B6 | 0b0000000010110110

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