SIP 180 Ringing vs 414 Request-URI Too Long
SIP 180 (Ringing) is a 1xx Provisional response, while 414 (Request-URI Too Long) is a 4xx Client Failure response. 180 indicates that the UA receiving the INVITE is trying to alert the user. This response is used to initiate local ringback tone at the caller's end. 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.
Description
The UA receiving the INVITE is trying to alert the user. This response is used to initiate local ringback tone at the caller's end.
When You See It
During call setup when the callee's phone is ringing. You should hear a ringback tone after receiving this response.
How to Fix
No fix needed — the callee's device is ringing. If the call never connects after ringing, check the callee's device or call forwarding settings.
Description
The server is refusing to service the request because the Request-URI is longer than the server is willing to interpret.
When You See It
When the SIP URI in the request line is excessively long, which may happen with URI parameters or long phone numbers.
How to Fix
Shorten the Request-URI. Remove unnecessary parameters or use a shorter alias for the destination.
Key Differences
180 is a 1xx Provisional response, while 414 is a 4xx Client Failure response.
SIP 180: The UA receiving the INVITE is trying to alert the user. This response is used to initiate local ringback tone at the caller's end.
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 180 when during call setup when the callee's phone is ringing. You should hear a ringback tone after receiving this response.
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.
When to Use Which
For 180 (Ringing): No fix needed — the callee's device is ringing. If the call never connects after ringing, check the callee's device or call forwarding settings. For 414 (Request-URI Too Long): Shorten the Request-URI. Remove unnecessary parameters or use a shorter alias for the destination.