Asterisk PJSIP endpoint shows unavailable

Interpret the status in context

An unavailable indication can relate to missing contacts or a failed reachability probe. It is not a complete root-cause statement. Record the endpoint, AOR and contact state from the running Asterisk instance.

PJSIP endpoint, auth and AOR

Inspect relationships

Use read-only CLI inspection to confirm the endpoint references the expected AOR and auth objects. If the endpoint itself is absent, review configuration loading and parser errors first. If it exists without a contact, investigate phone registration or the configured static destination.

If a contact exists but qualify fails, examine the probe's destination and whether the peer supports and answers the request under its policy. A network path or changed NAT mapping may be involved.

Compare a real call

A qualify result is one observation. Test an authorized internal call and inspect its specific request/response flow. Avoid declaring all service healthy solely because a probe receives a response.

Repair the demonstrated layer

Correct object references, registration or reachability according to the evidence. Do not set a large contact allowance or turn off qualification simply to change the displayed label. Confirm recovery after the phone renews or restarts and verify two-way audio separately.