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

# Basic Switch Configuration

- [Integrate Class 4 to Google SMTP](https://cookbook.denovolab.com/configuration/integrate-class-4-to-google-smtp.md): This section provides a guide on integrating Class 4 with the Google SMTP server.
- [Customize your logo](https://cookbook.denovolab.com/configuration/untitled.md)
- [Customize Domain Name](https://cookbook.denovolab.com/configuration/customize-domain-name.md)
- [Customize email template](https://cookbook.denovolab.com/configuration/customize-email-template.md)
- [Customize invoice template](https://cookbook.denovolab.com/configuration/customize-invoice-template.md)
- [Configuring Payment Gateway](https://cookbook.denovolab.com/configuration/configuring-payment-gateway.md)
- [Stripe Configuration](https://cookbook.denovolab.com/configuration/configuring-payment-gateway/stripe-configuration.md)
- [Paypal Configuration](https://cookbook.denovolab.com/configuration/configuring-payment-gateway/paypal-configuration.md)
- [Configuring CDR and PCAP Backup](https://cookbook.denovolab.com/configuration/configuring-cdr-and-pcap-backup.md)
- [Google Cloud Setup](https://cookbook.denovolab.com/configuration/configuring-cdr-and-pcap-backup/google-cloud-setup.md)
- [Configuring SIP Registration](https://cookbook.denovolab.com/configuration/configuring-sip-registration.md)
- [Configuring LRN](https://cookbook.denovolab.com/configuration/configuring-lrn.md)