SIP 182 Queued vs 486 Busy Here
SIP 182 (Queued) is a 1xx Provisional response, while 486 (Busy Here) is a 4xx Client 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, 486 means that the callee's end system was contacted successfully but the callee is currently not willing or able to take additional calls at this end system.
Description
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.
Quand vous le voyez
In call center or queuing scenarios where the callee is busy but the system holds the call in a queue.
Comment résoudre
Wait for the call to be dequeued. If queuing is not desired, configure the server to reject calls instead of queuing them.
Description
The callee's end system was contacted successfully but the callee is currently not willing or able to take additional calls at this end system.
Quand vous le voyez
When the callee is already on a call and does not have call waiting. The user explicitly rejected the call, or all lines are in use.
Comment résoudre
Wait and try again later. The callee may become available when their current call ends. Consider leaving a voicemail if available.
Différences clés
182 is a 1xx Provisional response, while 486 is a 4xx Client 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 486: The callee's end system was contacted successfully but the callee is currently not willing or able to take additional calls at this end system.
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 486 when when the callee is already on a call and does not have call waiting. The user explicitly rejected the call, or all lines are in use.
Quand utiliser lequel
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 486 (Busy Here): Wait and try again later. The callee may become available when their current call ends. Consider leaving a voicemail if available.