If you are experiencing issues with your FTTH (Fiber-to-the-Home) internet, it’s important to contact your ISP’s technical support team as soon as possible. However, before doing so, there are a few preliminary troubleshooting steps you can take:

1. Check all cables and connections to ensure everything is securely connected and functioning properly.
2. Restart your router and modem by unplugging them for a few minutes and plugging them back in.
3. Check for any service outages or maintenance notifications.
4. Run a speed test to determine if the issue is related to slow internet speeds.

When contacting technical support, be prepared to provide details about the issue and follow their instructions for any further troubleshooting or potential solutions. They may also be able to offer advice on optimizing your home network for better performance.