Monday, April 25, 2011
Japanese quake: impact on the telecom network
Japanese quake: impact on the telecom network
David Kennedy/Ovum |
March 23, 2011

Japan’s major telcos have been able to restore some fixed and mobile services in the worst affected areas, but the remaining problems will be harder to fix. We expect that some new problems will emerge in the coming weeks as stressed or damaged infrastructure fails, both on land and undersea.
Power shortages have led to rolling blackouts across the country, and these have disrupted access to fixed broadband and VoIP as terminal devices have been left without power.
Earthquakes damage telecommunications infrastructure in several ways. The vibrations from the quake, apart from shaking electronic equipment and civil infrastructure, can cause soil to liquefy, stressing or breaking pits, ducts, and cables. Liquefied soil can also enter pits and ducts.
Residual shearing, compression, and tension stresses in surrounding rock and soil also damage infrastructure, which can result in failure days or weeks after the initial earthquake.
Damaged ducts and pits can allow water to enter the system, which causes other failures, and undersea cables are particularly vulnerable to this threat. As a result, it is highly likely that further failures will occur.
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