The South Atlantic Cable System (SACS) is a submarine cable system connecting Sangano in Angola and Fortaleza in Brazil, the world's first submarine cable system across the South Atlantic.

The SACS cable consists of 4 fiber pairs, with an initial design capacity of 40Tb/s (100Gb/s x 100 wavelengths x 4 fiber-pairs).

The SACS is owned by Angola Cables, which is joint venture of five Angolan operators Angola Telecom (51%), Unitel (31%), MSTelcom (9%), Movicel (6%) and Startel (3%).

It is said, Telebras is a partner of Angola Cables to offer cable landing for the SACS.