The Optical Network Node (ONN) is an essential link in local fibre optic networks as the convergence point of various lines and the connection point for network subscribers. This technical room houses the active equipment and technical infrastructure that make it possible for the operator to manage and activate the connected lines. To secure and stabilise these installations against external aggressions, Grolleau offers prefabricated shelters:
- Lightweight, double-skinned aluminium shelters insulated from 5 to 20 m²
- Heavy concrete prefabricated shelters from 5 to 20 m²
These volumes allow for a connection capacity ranging from 1,000 to 4,000 lines. These plant rooms are made up of large shelters, positioned upstream of the mutualisation points (SAP cabinets) located in the heart of urban spaces.
However, Optical Network Nodes (ONNs) are allocated a minimum of two distinct spaces:
- A first space for hosting service operator equipment (bays housing active equipment, low-voltage switchboard (LVGS), air conditioning, control and alert systems, etc.);
A second space for the bays or clusters housing the cable heads of the FTTH (Fibre To The Home) service network.