The OLT SFP modules typically handle PON-specific protocols like GPON, EPON, XG-PON or 10G-EPON, managing the transmission and reception of data from multiple user terminals. This document describes the Gigabit Passive Optical Network (GPON) technology and how it functions. There are no specific requirements for this document. The information in this document was created from the devices in a. The S7500X-G series PON product is a new generation of high-end multi-service access OLT device launched by New H3C Technologies Co. It supports simultaneous access to both GPON and XGSPON. It is a cost-effective GPON customer premises system that provides broadband services with 1244 Mbps upstream and 2488 Mbps downstream by connecting to subscribers' switches or routers. The device. The optical module SFP (Small Form-factor Pluggable) optical modules used in OLT (Optical Line Terminal) devices and switches serve similar functions, such as providing fiber optic connections, but they differ in terms of application, protocol support, and network design requirements. Below is a detailed breakdown: OLT is the core device in PON (Passive Optical Network) systems, connecting. As foundational building blocks for the Cisco Digital Network Architecture, Catalyst PON Series switches help customers simplify complexity, optimize IT, and reduce operational costs by leveraging intelligence, automation and human expertise.