SIP 302 Moved Temporarily vs 439 First Hop Lacks Outbound Support
SIP 302 (Moved Temporarily) is a 3xx Redirection response, while 439 (First Hop Lacks Outbound Support) is a 4xx Client Failure response. 302 indicates that the callee has temporarily moved to a different address. The client should retry the request at the Contact address but continue using the original URI for future requests. In contrast, 439 means that the first outbound proxy does not support the SIP outbound mechanism (RFC 5626) that the UA is trying to use.
الوصف
The callee has temporarily moved to a different address. The client should retry the request at the Contact address but continue using the original URI for future requests.
متى تراه
When a user is temporarily reachable at a different location, such as when traveling or using a different device.
كيفية الإصلاح
Redirect the current call to the Contact URI provided, but keep the original URI for future requests.
الوصف
The first outbound proxy does not support the SIP outbound mechanism (RFC 5626) that the UA is trying to use.
متى تراه
When a UA configured for SIP outbound connects to a proxy that doesn't support the outbound option-tag.
كيفية الإصلاح
Upgrade the outbound proxy to support RFC 5626, or configure the UA to not require outbound support.
الفروق الرئيسية
302 is a 3xx Redirection response, while 439 is a 4xx Client Failure response.
SIP 302: The callee has temporarily moved to a different address. The client should retry the request at the Contact address but continue using the original URI for future requests.
SIP 439: The first outbound proxy does not support the SIP outbound mechanism (RFC 5626) that the UA is trying to use.
You encounter 302 when when a user is temporarily reachable at a different location, such as when traveling or using a different device.
You encounter 439 when when a UA configured for SIP outbound connects to a proxy that doesn't support the outbound option-tag.
متى تستخدم أيًا منهما
For 302 (Moved Temporarily): Redirect the current call to the Contact URI provided, but keep the original URI for future requests. For 439 (First Hop Lacks Outbound Support): Upgrade the outbound proxy to support RFC 5626, or configure the UA to not require outbound support.