Cisco IOS provides several useful CLI commands for viewing SFP information. The following table summarizes the most common ones. Lists all detected hardware, including installed SFPs — displays Product ID (PID), Version ID (VID), and Serial Number. The SFF-8024 standard, maintained by the Small Form Factor (SFF) Committee, provides a unified framework of Transceiver ID and Management Codes. These codes allow host devices to correctly identify, configure, and manage a wide range of pluggable modules—including SFP, SFP+, QSFP, OSFP, and SFP-DD. Understanding optical module coding brings more than easier integration; it will help you troubleshoot more intelligently and reduce risk. Let's discuss how mastering coding can improve your network's stability, efficiency, and even allow you more foresight to diagnose problems and prevent costly. An SFP module is a hot-swappable transceiver that converts electrical signals into optical (or electrical, in copper variants) signals. It enables flexible connectivity between networking devices and supports different speeds, wavelengths, and distances. Most Cisco optics also support Digital. This chapter describes how to configure the Optical Amplifier Module and Protection Switching Module (PSM).