The device similar to a DSL router, but used in a FTTH environment is called an optical unit network.

Name: The device similar to a DSL router, but used in a FTTH environment is called an optical unit network.
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An optical network unit (ONU) is a device that connects a customer's premises to a fiber-optic network. It is similar to a DSL router, but it is used in a FTTH (fiber to the home) environment.

The Device Similar to a DSL Router, but Used in a FTTH