SIP 182 Queued vs 603 Decline
SIP 182 (Queued) is a 1xx Provisional response, while 603 (Decline) is a 6xx Global Failure response. 182 indicates that the called party is temporarily unavailable but the server has decided to queue the call rather than reject it. The call will be attempted when the callee becomes available. 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
説明
The called party is temporarily unavailable but the server has decided to queue the call rather than reject it. The call will be attempted when the callee becomes available.
このコードが表示される場合
In call center or queuing scenarios where the callee is busy but the system holds the call in a queue.
解決方法
Wait for the call to be dequeued. If queuing is not desired, configure the server to reject calls instead of queuing them.
説明
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.
このコードが表示される場合
When the callee explicitly declines the call. This is an active rejection, not a busy or unavailable state.
解決方法
The callee has declined. Respect their decision. Consider alternative communication methods (email, messaging).
主な違い
182 is a 1xx Provisional response, while 603 is a 6xx Global Failure response.
SIP 182: The called party is temporarily unavailable but the server has decided to queue the call rather than reject it. The call will be attempted when the callee becomes available.
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 182 when in call center or queuing scenarios where the callee is busy but the system holds the call in a queue.
You encounter 603 when when the callee explicitly declines the call. This is an active rejection, not a busy or unavailable state.
どちらをいつ使うか
For 182 (Queued): Wait for the call to be dequeued. If queuing is not desired, configure the server to reject calls instead of queuing them. For 603 (Decline): The callee has declined. Respect their decision. Consider alternative communication methods (email, messaging).