The Central African Backbone (CAB) is a backbone connecting the countries of the (ECCAS) in via high speed internet. The countries included in the CAB project are:, the,,,, and. It's split up into five phases, each phase focusing on the fibre rollout in one or more countries.
The objective of relay protection is to quickly isolate a faulty section from both ends so that the rest of the system can function satisfactorily. The functional requirements of the relay:.