It's not the case here. On their website, google states: ... Dunant is the first long-haul subsea cable to feature a 12 fiber pair space-division multiplexing (

It's not the case here. On their website, google states: ... Dunant is the first long-haul subsea cable to feature a 12 fiber pair space-division multiplexing (SDM) design ... Multi-mode fibers are not feasible for long distance transmission. For long distance communications, using suggested approach, may be better to use multi-core fibers.