High-quality OLTs are designed with dual, hot-swappable power supplies. If one power unit fails or requires maintenance, the second continues operating without disrupting services. The OLT runs in two directions: the uplink direction, which is used to distribute data and voice traffic from subscribers, and the downlink direction, which is used to receive data, voice, and video. Among these components, PON cards and power modules support hot-swapping and include another module internally. The QSFP-DD. An optical line termination (OLT), also called an optical line terminal, is a device which serves as the service provider endpoint of a passive optical network. It provides two main functions: to perform conversion between the electrical signals used by the service provider's equipment and the. A hot-pluggable optical module refers to a transceiver that can be safely inserted into or removed from a powered host system—such as a switch, router, or NIC— without requiring a system reboot or shutdown. This is enabled by: When inserted: 3.
[PDF Version]