SIP 181 Call Is Being Forwarded vs 484 Address Incomplete
SIP 181 (Call Is Being Forwarded) is a 1xx Provisional response, while 484 (Address Incomplete) 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, 484 means that the Request-URI was incomplete. The server needs additional digits or information to route the call.
描述
A proxy server may send this to indicate that the call is being forwarded to a different set of destinations.
何时出现
When the callee has call forwarding enabled and the request is being redirected to another number or device.
如何修复
No action needed. The call is being redirected. If forwarding is unintended, the callee should update their forwarding settings.
描述
The Request-URI was incomplete. The server needs additional digits or information to route the call.
何时出现
When dialing a partial phone number that the server cannot resolve. Common in PSTN gateway scenarios with overlap dialing.
如何修复
Provide the complete destination address. Add missing digits or domain information to the Request-URI.
主要区别
181 is a 1xx Provisional response, while 484 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 484: The Request-URI was incomplete. The server needs additional digits or information to route the call.
You encounter 181 when when the callee has call forwarding enabled and the request is being redirected to another number or device.
You encounter 484 when when dialing a partial phone number that the server cannot resolve. Common in PSTN gateway scenarios with overlap dialing.
何时使用哪个
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 484 (Address Incomplete): Provide the complete destination address. Add missing digits or domain information to the Request-URI.