The Asia Pacific Cable Network 2 (APCN-2) is a 19,000-km submarine cable system linking Japan, Korea, China, Taiwan, Hong Kong, Philippines, Malaysia, and Singapore in a ring configuration, with four fiber-pairs connecting 10 submarine cable landing stations in Asia region, ready for service on December 20, 2001.

The APCN-2 is the first submarine cable system that has a self-healing function in the Asia region, and is capable of restoring itself instantly with its ring configuration when a failure occurs in a part of the system.

The APCN-2 has an initial design capacity of 2.56 Tbps by operating with 64x10 Gbps DWDM technology and four fiber-pairs ring.

The total initial investment of APCN-2 project is more than US$ 1 billion, including US$800 million supply contract awarded to NEC Corporation.

In 2010, the APCN-2 cable system was upgraded with 40Gbps DWDM technology. And it was further upgraded with 100Gbps DWDM technology in 2014. 

For further information, please refer to articles about APCN-2 Consortium and APCN-2 cable network.