SIP 182 Queued vs 300 Multiple Choices
SIP 182 (Queued) is a 1xx Provisional response, while 300 (Multiple Choices) is a 3xx Redirection 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, 300 means that the address in the request resolved to several choices, each with its own location. The user or UA can select a preferred communication endpoint.
描述
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.
何时出现
In call center or queuing scenarios where the callee is busy but the system holds the call in a queue.
如何修复
Wait for the call to be dequeued. If queuing is not desired, configure the server to reject calls instead of queuing them.
描述
The address in the request resolved to several choices, each with its own location. The user or UA can select a preferred communication endpoint.
何时出现
When a user has multiple registered devices or contact addresses and the server cannot determine which one to use.
如何修复
Select one of the provided Contact addresses and resend the request to that specific URI.
主要区别
182 is a 1xx Provisional response, while 300 is a 3xx Redirection 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 300: The address in the request resolved to several choices, each with its own location. The user or UA can select a preferred communication endpoint.
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 300 when when a user has multiple registered devices or contact addresses and the server cannot determine which one to use.
何时使用哪个
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 300 (Multiple Choices): Select one of the provided Contact addresses and resend the request to that specific URI.