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. Last Updated: 07/27/2016

MTS Explains Outage

The blackout of the Mobile TeleSystems network last Thursday was caused by a failure of the fiber-optic lines that string the cellular network together, the company has said in a statement.

The fiber-optic network that connects base stations to base station controllers was down for about 30 minutes Thursday afternoon, blacking out the center of Moscow, where about 40 percent of the company’s subscribers are located, the statement said.

It took nearly six hours to revive the network as the company feared a traffic surge would overload the switching center as subscribers redialed. The company switched the network on selectively as traffic began to fall, the statement said.