Marine System
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A Leading Global Manufacturer of Cable Systems

Submarine FO cable

ZTT Submarine Optical Fiber Cables (SOFC) are designed for both the repeater and non-repeater systems, and widely used in

-Telecom industry

-Offshore oil and gas industry

-Ocean observation network

ZTT has delivered over 10,000km SOFC since 1999, when she started to produce the cable. Over 1,000 km was applied in oversea projects.


Design & Construction

●Up to 8000m design water depth

●Seamless welded stainless steel tube with fiber jelly

●On-line fiber excess control

●Galvanized steel wires armoring

●Outer PE or PP-yarn protection


Reference Standards

●IEC 60793 & 60794 series

●ITU-T G.652D, G.654, G.655, G.971~978

●EIA/TIA 598

Type & Purposes

Typical structure of SOFC (S17- for Repeater System)



Typical structure of SOFC (Q10- for Unrepeater System)



Qualification & Certificates

ZTT is qualified by ISO 9001, OHSAS 18001 and ISO 14001 system. The quality assurance system covers the design and engineering, raw material selection, manufacturing, FAT and load out etc.

ZTT SOFC has been qualified as per IEC and ITU test standards, which is witnessed and certified by worldwide famous third-parties, like DNV, GL, BV and SGS etc.

ZTT SOFC was approved and accepted by many international end users and clients, including Saudi Aramco, Qatar Petroleum, Saipem, NPCC, McDermott, TechnipFMC, Subsea 7 and many more.


-UJ & UQJ Certified

-With sea trail in deep sea

-Operational experience over 3,000 meters

-Strict quality control and site management

-Domestic and international reference


Representative Projects

Product Catalogues