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Faults worth memorizing — Learn it in 5 minutes

About five minutes of reading

A short list beats a wiki nobody opens during an incident.

Softphone text that names TurnNlb is UDP 3478 or DNS. Lambda AccessDenied is the resource policy or the association. A 10-second function with an 8-second block is a timeout even when Lambda 'succeeded'. Campaign fast busy is the zero quota. The first phone-number claim can fail at quota zero-looking errors that need Support.

Voice ID faults after 20 May 2026 are expected. Remove the blocks. Email threads split at 90 days. Idle chats fill the 500.

Number on this page: List 20. Faults in the lab and the glossary

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Sources and go deeper

sources.json