Passive Optical Network (PON) - GPON PLANET GPON SFU ONT with 1-Port Optical network terminal (ONT) GPN-100 - Price (ex VAT): £14. Check it now!Openreach Optical Network Terminal (ONT) – Genuine Adtran GPON 1-Port ONT SDX611 This high-quality ONT connects directly to your incoming fibre network and converts the optical fibre signal into a standard Ethernet RJ45 output. This allows your router to connect seamlessly, providing reliable. Discover our selection of GPON, EPON, and XG (S)PON ONT/ONU devices. Some models of ONU/ONT can also broadcast a WiFi signal. Networking standards: IEEE 802. Fiber optic connector: LC (UPC), SC. Network access provider Openreach (BT) has published a new Suppliers Information Note (SIN) for their Fibre-to-the-Premises (FTTP) broadband ISP lines, which provides an updated summary of all their old, existing and future Optical Network Terminal (ONT) modems that they've deployed or intent to.