# 34002: Callee Busy

Log Level: ERROR

## Description

Twilio received a busy indication from the destination when attempting to complete a voice call. The called party was already on another call or the destination network reported the callee as unavailable because the line was busy.

### Possible causes

* The destination phone number is currently in use
* The destination carrier returned a busy response for the call attempt
* The called device or PBX rejected the call with a busy status
* Call forwarding or downstream routing sent the call to a busy endpoint

### Possible solutions

* Retry the call later when the destination is available
* Confirm that you are dialing the correct phone number in valid `E.164` format
* Review your call logs and call status to verify that the call ended with a busy result
* If you call a SIP endpoint or PBX, verify that the destination is registered, reachable, and not configured to reject calls as busy
* If the issue happens repeatedly for the same destination, contact the destination carrier or system administrator to confirm the line status and call routing

#### Additional resources

* [Call resource](/docs/voice/api/call-resource)
* [Call status and callbacks](/docs/voice/api/call-resource#call-status-values)
* [TwiML Voice: `<Dial>`](/docs/voice/twiml/dial)