Digital Line Systems Based on the 1544 kbit/s and the 2048 kbit/s Hierarchy on Optical Fibre Cables - Series G: Transmission Systems and Media Digital Systems and Networks Digital Transmission Systems - Digital Sections and Digital Line System - Digital L
The aim of this Recommendation is to achieve longitudinal compatibility on elementary cable sections of different digital line systems, i.e. the possibility of installing digital line systems, produced by different manufacturers, on the same optical fibre cable.