Active optical network meaning

In telecoms contracts, property wayleaves and regulatory documents, an active optical network (AON) describes a fibre access network that uses powered equipment at the distribution point to route traffic to individual premises. Instead of a passive optical splitter, an AON deploys an active switch (for example, an optical line distribution unit or an Ethernet switch), enabling higher bit rates per route and longer reach than a passive optical network (PON). Key legal implications include: arrangements for local power supply and back‑up; allocation of installation, operation and maintenance obligations; access rights to cabinets and street works; service levels and fault‑repair times; and liability and indemnities for outages caused by power failures. Contract drafting often covers ownership of the active equipment, resilience and security standards, and recovery of electricity costs. This is an engineering/industry term rather than one defined in legislation or case law. Usage is broadly consistent across England & Wales, Scotland, Northern Ireland and Ireland. Regulatory frameworks (for example, Ofcom’s regime under the Electronic Communications Code in the UK and ComReg’s framework in Ireland) may affect siting, consents and wholesale access in FTTP deployments, but do not alter the basic meaning of AON.