Fiber Network Interface Devices (NIDs) are typically found at the edge of a fiber network, where the service provider's infrastructure connects to the customer's premises. They're a key component in Fiber to the Premises (FTTP) or Fiber to the Home (FTTH) deployments. They may serve from one to multiple customer drops. They may also be referred to as an Optical Network Terminal (ONT). Typically server a single customer.

Copper Network Interfaces are the termination point of the drop cable to the customer premise before the cable is distributed within the building. They act like a mini distribution box and can server one or a few unique lines.

Coax interfaces are the termination point of the drop cable to the customer premise before the cable is distributed within the building. They act like a mini distribution box and can server one or a few unique lines.