AS2478 - MM Fibre to ROLI / RILO Rack mount Card
The fibre to ROLI/RILO signalling adaptor can provide conversion for both signal variants on the one PCB.
The unit can also be configured for operating on Singlemode or Multimode Fibre.
The units can be connected as shown below to provide a long line extension or hotline facility between two handsets in a lift to ring configuration.
Local signal connections and DC power are presented on a DIN41612, fibre is via ST connectors.
Future options include input for low speed data over speech (evacuation and status signalling).