What it means
The INVITE was cancelled before it completed, usually because a CANCEL arrived. This is the normal response to a cancelled call and is not an error by itself.
SIP/2.0 487 Request Terminated
Common causes
- The caller hung up before the call was answered
- A forked call was answered on another device, cancelling the rest
- A timeout triggered a CANCEL
- The call was cancelled by the application
How to fix it
- Usually nothing, this is expected for cancelled calls
- If it is unexpected, find out why the caller cancelled, such as long post dial delay or missing ringback
- Check fork behavior if calls are cancelled on other branches
See it in your own trace
Paste a full SIP or Asterisk log into the decoder and ladder tools to see exactly where this response appears in the call and what led to it. Everything runs in your browser, so your logs never leave your device.
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