IT Toolbox
Error code

486 — Busy here

The called endpoint reports that it is busy and cannot accept the call.

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486 — Busy here

Domain : SIP

What does this error mean?

The called endpoint reports that it is busy and cannot accept the call.

Where can it appear?

This error may appear in application logs, client messages, monitoring systems or protocol traces. Keep the complete timestamp, request context and surrounding events before troubleshooting.

Likely causes

  • Endpoint or trunk state
  • SIP routing, NAT or firewall behavior
  • SDP, codec or policy mismatch

Checks and resolution

  1. Capture and read the SIP ladder around the failure
  2. Check registration, trunk and routing status
  3. Compare SDP/codecs and network reachability
Caution : Avoid opening broad port ranges or disabling security controls just to make a call complete.
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