34002: Callee Busy

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.

• 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

• 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

• Call resource
• Call status and callbacks
• TwiML Voice: <Dial>