Conference bridge accepts PIN but never joins audio

Scenario

Callers enter the expected conference PIN and hear prompts, yet never connect into the actual meeting audio.

Recommended Resolution Path

1. Validate dial plan translation and conference bridge mapping for that number.
2. Check whether the bridge service is healthy and licensed.
3. Compare one working conference number against the failing one.
4. Document the bridge dependencies so future numbering changes do not orphan it.

Technician Notes

Document what changed, what confirmed the fix, and whether the issue points to a broader standards gap worth addressing for the client.