General

• What happens if a high-risk number is wrongly classified and affects my service?
• What measures does Plivo take to ensure the accuracy of its high-risk and premium number database?
• How does Plivo classify a number as 'high-risk' or 'premium'?
• What if my use case requires calls to high-risk numbers?
• What are premium or high-risk numbers?
• Can I map Plivo numbers to inbound trunks using an API?

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Configuration and Integration

• What IP addresses do I need to whitelist on my communications infrastructure for Zentrunk SIP trunking?

Troubleshooting

• Why was my call disconnected with ‘dno_caller_id' as the hangup cause?
• Can I debug audio quality information from Zentrunk debug logs?
• Are there any charges associated with utilizing the Zentrunk debug logs?
• Can I download the PCAPs for my Zentrunk calls?
• What information is available under Zentrunk debug logs?
• Can I export my call detail records for further analysis?

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Country-Specific Restrictions and Issues

• What are the restrictions on outbound calling toward Australia?
• What are the restrictions on calling toward China?
• What are the restrictions on caller ID?