> For the complete documentation index, see [llms.txt](https://v5cookbook.denovolab.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://v5cookbook.denovolab.com/troubleshoot.md).

# Troubleshoot

- [Getting "Missing table" error during invoice generation](https://v5cookbook.denovolab.com/troubleshoot/getting-missing-table-error-during-invoice-generation.md)
- [Switch can't process more than 30K ports](https://v5cookbook.denovolab.com/troubleshoot/switch-cant-process-more-than-30k-ports.md)
- [How many calls are client sending](https://v5cookbook.denovolab.com/troubleshoot/how-many-calls-are-client-sending.md)
- [Call Failure](https://v5cookbook.denovolab.com/troubleshoot/call-failure.md)
- [Enforce Valid DNIS Length](https://v5cookbook.denovolab.com/troubleshoot/enforce-valid-dnis-length.md)
- [Enforce E164 Format for Vendor Trunk](https://v5cookbook.denovolab.com/troubleshoot/enforce-e164-format-for-vendor-trunk.md)
- [Configure VoIP Switch in UI](https://v5cookbook.denovolab.com/troubleshoot/configure-voip-switch-in-ui.md)
- [SIP Switch is Down](https://v5cookbook.denovolab.com/troubleshoot/sip-switch-is-down.md)
- [Validate Auto-Invoice Rule](https://v5cookbook.denovolab.com/troubleshoot/validate-auto-invoice-rule.md)