Why it happens
- The person is on another call.
- All channels on a trunk are busy and the carrier reports it as busy.
What to check
- Nothing to fix if the person is really busy; check call waiting and per-line limits if it happens every time.
17
- Q.850 name
- User busy
- Group
- Normal events
- FreeSWITCH
- USER_BUSY
- Asterisk
- HANGUPCAUSE=17
- SIP response from a gateway
- 486 Busy Here
- In SIP
- Reason: Q.850;cause=17