ROVworld Subsea Information

In Japan, many under sea cables are damaged
Date: Monday, March 14, 2011 @ 14:00:11 EDT

The horrific earthquake and the ensuing tsunami have caused some widespread damage to the undersea communications, according to data collected by telecom industry sources. Initially, it was thought that the damage to the cables that connect Japan and Asia to each other and other parts of the world was limited, but new data shows the extent of problems.

According to research firm, Telegeography, following cables have been damaged.

* APCN-2 – which is an intra-Asian cable, which forms a ring linking China, Hong Kong, Japan, the Republic of Korea, Malaysia, the Philippines, Singapore and Taiwan.

* Pacific Crossing West and Pacific Crossing North, which are out of service.

* PacNet has reported outages on segments of its East Asia Crossing network.

* Korea Telecom reports that a segment of the Japan-US Cable Network is damaged

* NTT has reported damage to some segments of the PC-1submarine cable system.

Most of the damaged network routers land in the Ajigaura or Kitabaraki landing stations, which are between Tokyo and Sendai. (See the map.) The tsunami and earthquake have not Japan’s cable landing stations that are in the South of Tokyo, or on other side of the sheltered inlet that become Tokyo Bay, Telegeography said.

“We’re not aware of disruptions to any of the many cables that land here,” Stephan Beckart of Telegeorgraphy wrote in an email. “All of the cable systems that have reported outages also operate cables that land to the South of Tokyo, so no system appears to have suffered a complete outage.

A report in Dow Jones Newswires suggests that most companies are working hard to fix the network problems. The Dow Jones report has following additional details.

- KDDI says its cable between US and Japan is broken and it cannot transmit signals.
- NTT is using back-up cable systems.
- PCCW says the Internet traffic to US is slow.

In a story on Friday, Stacey Higginbotham had pointed out that Chunghwa of Taiwan had reported an outage on the APCN-2 system, while China Unicom had reported some unspecified damage to “2 or 3 cables.” There is clear decline in the Japan’s Internet performance, according to the data from JPNAP.


This article comes from ROVworld Subsea Information

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