SIP 181 Call Is Being Forwarded vs 423 Interval Too Brief
SIP 181 (Call Is Being Forwarded) is a 1xx Provisional response, while 423 (Interval Too Brief) is a 4xx Client Failure response. 181 indicates that a proxy server may send this to indicate that the call is being forwarded to a different set of destinations. In contrast, 423 means that the expiration time in the request is too short. The response contains a Min-Expires header indicating the minimum allowed value.
विवरण
A proxy server may send this to indicate that the call is being forwarded to a different set of destinations.
जब आप इसे देखें
When the callee has call forwarding enabled and the request is being redirected to another number or device.
कैसे ठीक करें
No action needed. The call is being redirected. If forwarding is unintended, the callee should update their forwarding settings.
विवरण
The expiration time in the request is too short. The response contains a Min-Expires header indicating the minimum allowed value.
जब आप इसे देखें
When a REGISTER or SUBSCRIBE request has an Expires value that is below the server's minimum. Common with aggressive keep-alive timers.
कैसे ठीक करें
Increase the Expires header value to at least the Min-Expires value from the response.
मुख्य अंतर
181 is a 1xx Provisional response, while 423 is a 4xx Client Failure response.
SIP 181: A proxy server may send this to indicate that the call is being forwarded to a different set of destinations.
SIP 423: The expiration time in the request is too short. The response contains a Min-Expires header indicating the minimum allowed value.
You encounter 181 when when the callee has call forwarding enabled and the request is being redirected to another number or device.
You encounter 423 when when a REGISTER or SUBSCRIBE request has an Expires value that is below the server's minimum. Common with aggressive keep-alive timers.
कब किसका उपयोग करें
For 181 (Call Is Being Forwarded): No action needed. The call is being redirected. If forwarding is unintended, the callee should update their forwarding settings. For 423 (Interval Too Brief): Increase the Expires header value to at least the Min-Expires value from the response.