{
:accepted => 202,
:address_incomplete => 484,
:alternative_service => 380,
:ambiguous => 485,
:bad_event => 489,
:bad_extension => 420,
:bad_gateway => 502,
:bad_identity_info => 436,
:bad_request => 400,
:busy_everywhere => 600,
:busy_here => 486,
:call_being_forwarded => 181,
:call_leg_done => 481,
:call_queued => 182,
:conditional_request_failed => 412,
:decline => 603,
:does_not_exit_anywhere => 604,
:extension_required => 421,
:forbidden => 403,
:gone => 410,
:interval_too_brief => 423,
:invalid_identity_header => 438,
:loop_detected => 482,
:message_too_large => 513,
:method_not_allowed => 405,
:moved_permanently => 301,
:moved_temporarily => 302,
:multiple_choices => 300,
:not_acceptable => 406,
:not_acceptable_anywhere => 606,
:not_acceptable_here => 488,
:not_found => 404,
:not_implemented => 501,
:ok => 200,
:payment_required => 402,
:precondition_failure => 580,
:provide_referer_identity => 429,
:proxy_authentication_required => 407,
:request_entity_too_large => 413,
:request_pending => 491,
:request_terminated => 487,
:request_timeout => 408,
:request_uri_too_long => 414,
:ringing => 180,
:security_agreement_required => 494,
:server_internal_error => 500,
:server_timeout => 504,
:service_unavailable => 503,
:session_interval_too_small => 422,
:session_progress => 183,
:temporarily_unavailable => 480,
:too_many_hops => 483,
:trying => 100,
:unauthorized => 401,
:undecipherable => 493,
:unsupported_certificate => 437,
:unsupported_media_type => 415,
:unsupported_uri_scheme => 416,
:use_identity_header => 428,
:use_proxy => 305,
:version_not_supported => 505,
}