| Feature | OLT (Optical Line Terminal) | ONU (Optical Network Unit) |
|---|
| Role | Central device in PON networks that manages multiple ONUs | Device at the customer premises that connects to the OLT |
| Location | Service provider's central office | Customer's location |
| Function | Controls and manages data transmission to ONUs | Receives data from OLT and provides network access to end devices |
| Required Certifications | Networking certifications (e.g., Cisco CCNA, CompTIA Network+) | Similar certifications as OLT, often with additional customer premises equipment training |
In summary, the OLT is the central device managing multiple ONUs in a fiber network, which are located at customer sites. While both require networking knowledge and certifications, the OLT is typically found in the provider's central office, whereas the ONU is installed at the customer's premises to provide network access.