So, starting from the four units of the existing packet switches on the right, we’ve been gradually switching over to these new switches. And we saw a very steadfast progress, completing the accommodation of 23 units of fiber RNC. But now, the remaining 37 radio network controllers were about to be accommodated in a new packet switches.But then immediately after the switch over, which was completed after around 3:00 in early morning, then starting from around 8:30 in the morning, we saw a gradual occurrence of congestion in the nodes. And then around 9:00, we have seen a steep increase of convectors – steep degradation of the congestion around 9:00 in the morning of 25th of January.
NTT DoCoMo's CEO Discusses F3Q 2012 Results - Earnings Call Transcript
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