SIP 199 Early Dialog Terminated vs 412 Conditional Request Failed
SIP 199 (Early Dialog Terminated) is a 1xx Provisional response, while 412 (Conditional Request Failed) is a 4xx Client Failure response. 199 indicates that a UAS can send this to indicate that an early dialog has been terminated. Used when forking results in multiple early dialogs. In contrast, 412 means that the precondition given in the request was not met. Used with SIP event state publication (RFC 3903).
Açıklama
A UAS can send this to indicate that an early dialog has been terminated. Used when forking results in multiple early dialogs.
Gördüğünüzde
In forked call scenarios when one of the forked branches is cancelled because another branch was answered.
Nasıl Düzeltilir
No action needed. This is normal behavior in forked call setups. Ensure your UA handles early dialog termination gracefully.
Açıklama
The precondition given in the request was not met. Used with SIP event state publication (RFC 3903).
Gördüğünüzde
When a PUBLISH request includes an If-Match header with an entity tag that does not match the current state on the server.
Nasıl Düzeltilir
Refresh the entity tag by performing a new PUBLISH without If-Match, then use the returned SIP-ETag for subsequent updates.
Temel Farklar
199 is a 1xx Provisional response, while 412 is a 4xx Client Failure response.
SIP 199: A UAS can send this to indicate that an early dialog has been terminated. Used when forking results in multiple early dialogs.
SIP 412: The precondition given in the request was not met. Used with SIP event state publication (RFC 3903).
You encounter 199 when in forked call scenarios when one of the forked branches is cancelled because another branch was answered.
You encounter 412 when when a PUBLISH request includes an If-Match header with an entity tag that does not match the current state on the server.
Hangisini Ne Zaman Kullanmalı
For 199 (Early Dialog Terminated): No action needed. This is normal behavior in forked call setups. Ensure your UA handles early dialog termination gracefully. For 412 (Conditional Request Failed): Refresh the entity tag by performing a new PUBLISH without If-Match, then use the returned SIP-ETag for subsequent updates.