> For the complete documentation index, see [llms.txt](https://retailcloud.gitbook.io/hardware/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://retailcloud.gitbook.io/hardware/payment-devices/pax-s300/common-issues.md).

# Common Issues

| Issue            | Reason                                    | Troubleshooting                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| ---------------- | ----------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| CONNECTION ERROR | Communication failure between PAX and POS | <p><a href="https://app.gitbook.com/@retailcloud/s/hardware/payment-devices/pax-s300/common-issues/how-to-troubleshoot-connection-error-between-pax-and-pos">1. Verify Payment Settings </a></p><p><a href="https://app.gitbook.com/@retailcloud/s/hardware/payment-devices/pax-s300/common-issues/how-to-troubleshoot-connection-error-between-pax-and-pos">2. Verify the IP Address </a></p><p><a href="https://app.gitbook.com/@retailcloud/s/hardware/payment-devices/pax-s300/common-issues/how-to-troubleshoot-connection-error-between-pax-and-pos">3. Verify he PAX Communications params </a></p><p><a href="https://app.gitbook.com/@retailcloud/s/hardware/payment-devices/pax-s300/common-issues/how-to-troubleshoot-connection-error-between-pax-and-pos">4. Ping Test </a></p><p><a href="https://app.gitbook.com/@retailcloud/s/hardware/payment-devices/pax-s300/common-issues/how-to-troubleshoot-connection-error-between-pax-and-pos">5. Run a sample Sale</a></p> |