SIP 199 Early Dialog Terminated vs 483 Too Many Hops
SIP 199 (Early Dialog Terminated) is a 1xx Provisional response, while 483 (Too Many Hops) 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, 483 means that the Max-Forwards header has reached zero, indicating the request has passed through too many proxies.
Descripción
A UAS can send this to indicate that an early dialog has been terminated. Used when forking results in multiple early dialogs.
Cuándo lo verás
In forked call scenarios when one of the forked branches is cancelled because another branch was answered.
Cómo solucionarlo
No action needed. This is normal behavior in forked call setups. Ensure your UA handles early dialog termination gracefully.
Descripción
The Max-Forwards header has reached zero, indicating the request has passed through too many proxies.
Cuándo lo verás
When a request traverses more proxies than the Max-Forwards counter allows (default 70). Often indicates a routing loop.
Cómo solucionarlo
Check for routing loops. If the path is legitimately long, increase Max-Forwards. Usually indicates misconfigured routing.
Diferencias clave
199 is a 1xx Provisional response, while 483 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 483: The Max-Forwards header has reached zero, indicating the request has passed through too many proxies.
You encounter 199 when in forked call scenarios when one of the forked branches is cancelled because another branch was answered.
You encounter 483 when when a request traverses more proxies than the Max-Forwards counter allows (default 70). Often indicates a routing loop.
Cuándo usar cada uno
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 483 (Too Many Hops): Check for routing loops. If the path is legitimately long, increase Max-Forwards. Usually indicates misconfigured routing.