Connect LabAmazon Connect study

Troubleshooting

Faults worth memorizing

Learn it in 5 minutes

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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.

  • SAML users with no routing profile signed in and cannot take work.
  • Global Resiliency numbers missing from the replica were never in a distribution group.
  • A recording missing from S3 is policy, key, or the block.
  • CTR delay under five minutes is buffering. Past that, check Firehose errors.

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

Confirm before relying. Prices, quotas, and exam names change. Use the source linked on this page.

Visual

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Faults worth memorizing
Diagram SVGDiagram PNGDiagram HTMLFlow SVGFlow PNGFlow HTML

Picture from this room.

Worked example

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  1. Match the symptom. To one class.
  2. Open that log. Not all logs.
  3. Fix. The class.
  4. Add. A new fault only if it is new.

What usually goes wrong: One runbook called 'call quality' that includes Lambda timeouts.

Quiz

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Question 1

Which term matches this description? Streams can run media-less. Media still needs the softphone allow list. Fix: Init the CCP with softphone options and test UDP 3478.

Show the cited answer

Streams can run media-less. Media still needs the softphone allow list. Fix: Init the CCP with softphone options and test UDP 3478. The term is Custom CCP loads and audio never starts.

Set up your network to use the Connect Customer Contact Control Panel (CCP) - Amazon Connect Customer AWS docs. last checked 2026-10

Question 2

Which term matches this description? Cause: amazon-connect-streams can run media-less. Media still needs the softphone allow list.

Show the cited answer

Cause: amazon-connect-streams can run media-less. Media still needs the softphone allow list. The term is Custom CCP loads and audio never starts (2).

Set up your network to use the Connect Customer Contact Control Panel (CCP) - Amazon Connect Customer AWS docs. last checked 2026-10

Sources

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Contact Control Panel (CCP) Issues - Amazon Connect Customer AWS docs. last checked 2026-10

The prose is a study paraphrase. The link is the source of the facts.

Ecosystem

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Glossary

  • Flow log A CloudWatch log of each block. Set logging behavior turns it on. The log group is under the instance.
  • Error branch The path a block takes when it fails. An unconnected error branch ends the contact.

Mind map

Open the Troubleshooting mind map

Sister technologies

The useful habit is to name the hop, the ContactId, the counter, and the log line before you edit the flow.

Config and troubleshooting

One runbook called 'call quality' that includes Lambda timeouts.

The troubleshooting habit starts with a log line. ContactflowLogs on the instance is what lets Set logging behavior write to CloudWatch.

AWS::Connect::Instance

CloudFormation study snippet
Resources:
  CampusInstance:
    Type: AWS::Connect::Instance
    Properties:
      IdentityManagementType: SAML
      InstanceAlias: campus-demo
      Attributes:
        InboundCalls: true
        OutboundCalls: true
        ContactflowLogs: true

Integration map

Join records on ContactId. The integration map room lists the seams.

Cross-platform bridges

A CUCM calling search space is not a routing profile, but the profile is the closest idea of 'who can receive what'. A partition is not a Connect object. A UCCX CSQ and a UCCE skill group map to a queue. Precision steps map to routing criteria. A script, an Architect flow, and an Avaya vector map to a contact flow.

Open the mapping room

Future hooks

Hooks you can adopt later: EventBridge contact events, the CTR stream, agent events, Kinesis Video, Customer Profiles events, Cases, Show view, data tables, External Tool, and the flow language JSON in your pipeline. Live Sync and Agentic CX are the 2026 hooks for guided and agentic experiences.

Sources and go deeper

sources.json