The Thailand - Indonesia - Singapore Cable Network (TIS) is a 1100-km regional submarine network linking Songkhla (Thailand), Batam (Indonesia) and Changi (Singapore). The TIS consortium includes CAT Telecom Public Company Ltd. of Thailand (CAT), PT Telekomunikasi Indonesia Tbk of Indonesia (Telin) and Singapore Telecommunications Limited of Singapore (SingTel) which jointly invested 36 million to build the TIS cable network.

The TIS was ready for service on December 2, 2003, with an lit capacity of 30 Gbps and upgradeable up to 320Gbit/s.