Code HRESULT Description #define
100 0x00EF0064 Trying RTC_E_STATUS_INFO_TRYING
180 0x00EF00B4 Ringing RTC_E_STATUS_INFO_RINGING
181 0x00EF00B5 Call Is Being Forwarded RTC_E_STATUS_INFO_CALL_FORWARDING
182 0x00EF00B6 Queued RTC_E_STATUS_INFO_QUEUED
183 0x00EF00B7 Session Progress RTC_E_STATUS_SESSION_PROGRESS
200 0x00EF00C8 OK RTC_E_STATUS_SUCCESS
300 0x80EF012C Multiple Choices RTC_E_STATUS_REDIRECT_MULTIPLE_CHOICES
301 0x80EF012D Moved Permanently RTC_E_STATUS_REDIRECT_MOVED_PERMANENTLY
302 0x80EF012E Moved Temporarily RTC_E_STATUS_REDIRECT_MOVED_TEMPORARILY
303 0x80EF012F See Other RTC_E_STATUS_REDIRECT_SEE_OTHER
305 0x80EF0131 Use Proxy RTC_E_STATUS_REDIRECT_USE_PROXY
380 0x80EF017C Alternative Service RTC_E_STATUS_REDIRECT_ALTERNATIVE_SERVICE
400 0x80EF0190 Bad Request RTC_E_STATUS_CLIENT_BAD_REQUEST
401 0x80EF0191 Unauthorized RTC_E_STATUS_CLIENT_UNAUTHORIZED
402 0x80EF0192 Payment Required RTC_E_STATUS_CLIENT_PAYMENT_REQUIRED
403 0x80EF0193 Forbidden RTC_E_STATUS_CLIENT_FORBIDDEN
404 0x80EF0194 Not Found RTC_E_STATUS_CLIENT_NOT_FOUND
405 0x80EF0195 Method Not Allowed RTC_E_STATUS_CLIENT_METHOD_NOT_ALLOWED
406 0x80EF0196 Not Acceptable RTC_E_STATUS_CLIENT_NOT_ACCEPTABLE
407 0x80EF0197 Proxy Authentication Required RTC_E_STATUS_CLIENT_PROXY_AUTHENTICATION_REQUIRED
408 0x80EF0198 Request Timeout RTC_E_STATUS_CLIENT_REQUEST_TIMEOUT
409 0x80EF0199 Conflict RTC_E_STATUS_CLIENT_CONFLICT
410 0x80EF019A Gone RTC_E_STATUS_CLIENT_GONE
411 0x80EF019B Length Required RTC_E_STATUS_CLIENT_LENGTH_REQUIRED
413 0x80EF019D Request Entity Too Large RTC_E_STATUS_CLIENT_REQUEST_ENTITY_TOO_LARGE
414 0x80EF019E Request-URI Too Long RTC_E_STATUS_CLIENT_REQUEST_URI_TOO_LARGE
415 0x80EF019F Unsupported Media Type RTC_E_STATUS_CLIENT_UNSUPPORTED_MEDIA_TYPE
420 0x80EF01A4 Bad Extension RTC_E_STATUS_CLIENT_BAD_EXTENSION
480 0x80EF01E0 Temporarily Unavailable RTC_E_STATUS_CLIENT_TEMPORARILY_NOT_AVAILABLE
481 0x80EF01E1 Call Leg/Transaction Does Not Exist RTC_E_STATUS_CLIENT_TRANSACTION_DOES_NOT_EXIST
482 0x80EF01E2 Loop Detected RTC_E_STATUS_CLIENT_LOOP_DETECTED
483 0x80EF01E3 Too Many Hops RTC_E_STATUS_CLIENT_TOO_MANY_HOPS
484 0x80EF01E4 Address Incomplete RTC_E_STATUS_CLIENT_ADDRESS_INCOMPLETE
485 0x80EF01E5 Ambiguous RTC_E_STATUS_CLIENT_AMBIGUOUS
486 0x80EF01E6 Busy Here RTC_E_STATUS_CLIENT_BUSY_HERE
487 0x80EF01E7 Request Terminated RTC_E_STATUS_REQUEST_TERMINATED
488 0x80EF01E8 Not Acceptable Here RTC_E_STATUS_NOT_ACCEPTABLE_HERE
500 0x80EF01F4 Server Internal Error RTC_E_STATUS_SERVER_INTERNAL_ERROR
501 0x80EF01F5 Not Implemented RTC_E_STATUS_SERVER_NOT_IMPLEMENTED
502 0x80EF01F6 Bad Gateway RTC_E_STATUS_SERVER_BAD_GATEWAY
503 0x80EF01F7 Service Unavailable RTC_E_STATUS_SERVER_SERVICE_UNAVAILABLE
504 0x80EF01F8 Server Time-out RTC_E_STATUS_SERVER_SERVER_TIMEOUT
505 0x80EF01F9 Version Not Supported RTC_E_STATUS_SERVER_VERSION_NOT_SUPPORTED
600 0x80EF0258 Busy Everywhere RTC_E_STATUS_GLOBAL_BUSY_EVERYWHERE
603 0x80EF025B Decline RTC_E_STATUS_GLOBAL_DECLINE
604 0x80EF025C Does Not Exist Anywhere RTC_E_STATUS_GLOBAL_DOES_NOT_EXIST_ANYWHERE
606 0x80EF025E Not Acceptable RTC_E_STATUS_GLOBAL_NOT_ACCEPTABLE