SIP 199 Early Dialog Terminated vs 200 OK
SIP 199 (Early Dialog Terminated) is a 1xx Provisional response, while 200 (OK) is a 2xx Success 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, 200 means that the request has succeeded. For INVITE, the call has been answered. For other methods, the action has been completed successfully.
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 request has succeeded. For INVITE, the call has been answered. For other methods, the action has been completed successfully.
Gördüğünüzde
When a call is answered (INVITE 200 OK), a registration succeeds (REGISTER 200 OK), or a subscription is accepted (SUBSCRIBE 200 OK).
Nasıl Düzeltilir
No fix needed — this is a success response. The caller should send an ACK to complete the three-way handshake for INVITE transactions.
Temel Farklar
199 is a 1xx Provisional response, while 200 is a 2xx Success 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 200: The request has succeeded. For INVITE, the call has been answered. For other methods, the action has been completed successfully.
You encounter 199 when in forked call scenarios when one of the forked branches is cancelled because another branch was answered.
You encounter 200 when when a call is answered (INVITE 200 OK), a registration succeeds (REGISTER 200 OK), or a subscription is accepted (SUBSCRIBE 200 OK).
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 200 (OK): No fix needed — this is a success response. The caller should send an ACK to complete the three-way handshake for INVITE transactions.