SIP 100 Trying vs 414 Request-URI Too Long
SIP 100 (Trying) is a 1xx Provisional response, while 414 (Request-URI Too Long) is a 4xx Client Failure response. 100 indicates that the request has been received by the next-hop server and an unspecified action is being taken to process it. The UAC should expect additional responses. In contrast, 414 means that the server is refusing to service the request because the Request-URI is longer than the server is willing to interpret.
説明
The request has been received by the next-hop server and an unspecified action is being taken to process it. The UAC should expect additional responses.
このコードが表示される場合
Immediately after sending an INVITE. The proxy has received the call and is searching for the callee. This is the SIP equivalent of a dial tone.
解決方法
No fix needed — this is normal call setup behavior. If stuck on 100 Trying for too long, check network connectivity and proxy configuration.
説明
The server is refusing to service the request because the Request-URI is longer than the server is willing to interpret.
このコードが表示される場合
When the SIP URI in the request line is excessively long, which may happen with URI parameters or long phone numbers.
解決方法
Shorten the Request-URI. Remove unnecessary parameters or use a shorter alias for the destination.
主な違い
100 is a 1xx Provisional response, while 414 is a 4xx Client Failure response.
SIP 100: The request has been received by the next-hop server and an unspecified action is being taken to process it. The UAC should expect additional responses.
SIP 414: The server is refusing to service the request because the Request-URI is longer than the server is willing to interpret.
You encounter 100 when immediately after sending an INVITE. The proxy has received the call and is searching for the callee. This is the SIP equivalent of a dial tone.
You encounter 414 when when the SIP URI in the request line is excessively long, which may happen with URI parameters or long phone numbers.
どちらをいつ使うか
For 100 (Trying): No fix needed — this is normal call setup behavior. If stuck on 100 Trying for too long, check network connectivity and proxy configuration. For 414 (Request-URI Too Long): Shorten the Request-URI. Remove unnecessary parameters or use a shorter alias for the destination.