SIP 302 Moved Temporarily vs 603 Decline
SIP 302 (Moved Temporarily) is a 3xx Redirection response, while 603 (Decline) is a 6xx Global 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, 603 means that the callee's machine was contacted successfully but the user explicitly does not wish to or cannot participate. Unlike 600, this may be because the callee doesn't want to communicate, not necessarily
Description
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.
When You See It
When a user is temporarily reachable at a different location, such as when traveling or using a different device.
How to Fix
Redirect the current call to the Contact URI provided, but keep the original URI for future requests.
Description
The callee's machine was contacted successfully but the user explicitly does not wish to or cannot participate. Unlike 600, this may be because the callee doesn't want to communicate, not necessarily because they're busy.
When You See It
When the callee explicitly declines the call. This is an active rejection, not a busy or unavailable state.
How to Fix
The callee has declined. Respect their decision. Consider alternative communication methods (email, messaging).
Key Differences
302 is a 3xx Redirection response, while 603 is a 6xx Global 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 603: The callee's machine was contacted successfully but the user explicitly does not wish to or cannot participate. Unlike 600, this may be because the callee doesn't want to communicate, not necessarily
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 603 when when the callee explicitly declines the call. This is an active rejection, not a busy or unavailable state.
When to Use Which
For 302 (Moved Temporarily): Redirect the current call to the Contact URI provided, but keep the original URI for future requests. For 603 (Decline): The callee has declined. Respect their decision. Consider alternative communication methods (email, messaging).