Restoration Status for Damage Caused by the Great East Japan Earthquake and Future Responses

Transcription

1 Restoration Status for Damage Caused by the Great East Japan Earthquake and Future Responses May

2 The forward-looking statements and projected figures concerning the future performance of NTT and its subsidiaries and affiliates contained or referred to herein are based on a series of assumptions, projections, estimates, judgments and beliefs of the management of NTT in light of information currently available to it regarding NTT and its subsidiaries and affiliates, the economy and telecommunications industry in Japan and overseas, and other factors. These projections and estimates may be affected by the future business operations of NTT and its subsidiaries and affiliates, the state of the economy in Japan and abroad, possible fluctuations in the securities markets, the pricing of services, the effects of competition, the performance of new products, services and new businesses, changes to laws and regulations affecting the telecommunications industry in Japan and elsewhere, other changes in circumstances that could cause actual results to differ materially from the forecasts contained or referred to herein, as well as other risks included in NTT s most recent Annual Report on Form 20-F and other filings and submissions with the United States Securities and Exchange Commission. 1

3 Restoration Efforts In fixed-line services, important sites were first specifically pin-pointed and restored by undertaking measures, such as temporarily restoring the transmission lines and employing emergency portable communications equipment. Thereafter, NTT EAST restored exchange buildings communication facilities as well as access lines. As for mobile services, large zone schemes were employed to cover multiple base station areas, and emergency fiber optic cables, microwave transmission and satellite circuits were utilized during base station restorations. In the area surrounding the Fukushima Nuclear Power Plant, the parent base station at the Iwaki Tomioka Building was restored and mobile satellite base station vehicles and high-performance antennas were installed. Restoration method 1 Securing transmission lines Detail of restoration Emergency restoration by connecting damaged sections and newly creating temporary aerial rerouting lines Amount of work Connecting severed sections 31 routes Rerouting to other lines 42 routes 2 Restoring exchange offices Remove debris, clean and temporarily repair buildings interiors in reusable buildings Install BOX in severely damaged buildings Building restorations BOX installations 29 buildings 4 buildings Building restoration Replacing power equipment Restoring communication equipment Storing in other stations Temporarily establishing new electric power equipment (Electric switchboard, Rectification circuit, batteries) Temporary restoration of power using mobile power supply vehicles and generators Establishing new communication equipment by using stock items and items that were to be used in planned construction. Where damage to the original exchange building was severe and could no longer be used as is, exchanges were extensively relocated from other exchange buildings. BuildingsEquipment - Electric switchboard - Rectification circuit - Batteries -Converters - IP Equipment - Exclusive equipment - RSBM-F Access zone restoration Restoring mobile base stations Restoration in area surrounding Nuclear Power Plant Prioritize restoration of social infrastructure by restoration of leased lines (self-defense force, airport, trains, etc.) Immediate installation of metal and optical fiber cables using materials stocked for planned constructions, etc. Restoration of facilities utilizing emergency fiber optic cables and microwave transmission and satellite circuits Multiple base station coverage through the employment of large zone schemes Restoration of Iwaki Tomioka Building facilitating parent base station as well as switch of circuit routes Installation of high-performance antennas and mobile satellite base station vehicles 2 Telephone poles: Cables: Base station restorations 770 Buildings Restored base stations 3, 600 poles 800km 6 buildings 51 stations

4 Restoration Status Restoration will be mostly complete by the end of April for exchange office buildings and mobile base stations in areas where customers currently reside. As for the areas around the Fukushima Daiichi Nuclear Power Plant, customer residential areas and the nuclear power plant operation area have been restored as well. Means of restoration are as follows: Renewal of power supplies and equipment in exchange offices, re-installation of relay transmission line Repair of base stations relay transmission lines using emergency fiber optic cable and entrance microwave system Area remedies for mobile phones using large zone schemes NTT Group will aim to restore areas where difficulties remain for customers to reside due to extensive damage to their homes, at the same pace roads and other infrastructure are restored. Exchange offices / base stations with disrupted service Nuclear power plant area etc. 385 exchange offices 4,900 base stations Fixed Mobile After disaster 46 exchange offices Iwate 21 Miyagi base stations Iwate 184 Miyagi 97 Fukushima 2Fukushima March 28 *1 3 0 exchange offices 17 *2 base stations End of April Iwate 15 Miyagi 1 Fukushima 1 *1 Small island regions experiencing island evacuation *2 Areas experiencing construction difficulties, including severed roads 0 0 base exchange stations offices End of May (scheduled)

5 1 Securing relay transmission lines Establish backup relay routes or switch routes to achieve connectivity at disrupted points or to bypass damaged relay transmission lines. Main relay transmission lines to be secured through the aforementioned measures. Example of restoring transmission through the establishment of a backup relay route from Ofunato Building to Kamaishi-Kaminakashima Building (Iwate Pref.) Kamaishi- Kaminakashima Restoration Image Ofunato Building Disconnection of the relay transmission line connecting Ofunato Building and Kamaishi- Kaminakashiima Buiding due to the earthquake Kamaishi- Kaminakashima Building Ofunato Near Sanriku Railways Horei Station : existing cables : new cables Photographs showing Cables were disconnected along the installation process with the Sanriku Railways railroad track. 11 new poles were erected for the new cabling. Connection of the core cabling between the existing cable and the backup relay route cable. 4

6 2 Example of restoration works (new installation of switching equipment) Shichigahama Building (Miyagi Pref.) Since the whole Shichigahama Building was lost to floods, a SBM-BOX and IP-BOX (outdoor-use circuit switch) was installed at the building s original site, for service restoration. Photographs showing the damaged Shichigahama Building Building was carried 500m away by flood from its original site *Tsunami took out the whole building Restoration Image : existing cables : new cables By suspending existing renewal and installation plans, equipment originally scheduled for a different use are to be diverted for use at the site. Municipal facilities, etc Shichigahama Building SBM-BOX IP-BOX New cables will be installed to connect with existing cabling *SBM : Subscriber Module (Equipment which accommodates PSTN and leased line circuits to be multiplexed and connected to a fiber optic line, connecting to a NTT exchange office building) 5

7 3 Restoration of Access Areas Extensive damages to telephone poles and cables caused by tsunami After the removal of debris, communication services were restored by installing telephone poles and laying out and connecting cables to residential areas. [Step 1] After the removal of debris, telephone poles were erected and tow cables were laid Damaged telephone poles [Step 2] Installation of aerial cables Flooded area [Step 3] Connections in manholes [Step 4] Connections of aerial cables 6

8 4 Restoration Using Optical Fiber/Stopgap Optical Fiber Installed stopgap optical fiber Connected with existing optical fiber Installed temporary optical fiber aggregation node to replace damaged aggregation node Use of existing optical fiber : Stopgap optical fiber : Existing optical fiber 7

9 4 Example of mobile base station restorations (microwave transmission / satellite circuits) countermeasure Disrupted optical fiber Utilization of microwave transmission Utilization of satellite circuits countermeasure Disrupted optical fiber, damage from tsunami 8

10 4 Restoration Using Large Zone Scheme Actively apply large zone scheme* in high-elevation base stations * a method that covers areas normally covered by multiple stations with a single station Countermeasure 9

11 5 Restoration in the Nuclear Power Plant Area Iwaki Tomioka Exchange Office, Fukushima Prefecture In order to restore non-functional exchange offices covering the area 20km ~ 30km from the Fukushima Daiichi Nuclear Power Plant, restoration of the function at the Iwaki Tomioka Exchange Office, located approximately 10km from the plant, was necessary. For this reason, NTT East, with the cooperation of Tokyo Electric Power Company and Tohoku Electric Power Company, recovered electricity while performing restoration activities at the office, successfully restoring functions of 6 buildings and 7 mobile base stations. As a result, some mobile base stations have also been restored. Status of work in the Iwaki Tomioka Exchange Office Radiation management engineers accompany the workers and, wearing protective clothing, perform the work Planned evacuation area (From 4/22) Iwaki Tsushima Order to remain indoors Radius: km (Lifted 4/22) 20 km radius evacuation order territory (Hazard area from 4/22) Emergency evacuation preparation area (From 4/22) Katsurao Iwaki Kawauchi Namie Iwaki Futaba Okuma Iwaki Tomioka Naraha Iwaki Hirono Fukushima Daiichi Nuclear Power Plant Fukushima Daini Nuclear Power Plant 10 *Names in white indicate the six restored buildings.

12 5 Restoration of Areas (within 20km from Fukushima Daiichi Nuclear Plant) Coverage restoration at J-Village (Taruha-cho) (Deployed satellite mobile base station vehicle on Apr. 1) Base station restoration by replacement of transmission line (Exchange office in Tomioka-city: Replaced on Apr. 13) Coverage restoration by using high-performance antenna (Base station site in Iwaki-city: Installed on Apr. 13) 11

13 6 Recovery from Great East Japan Earthquake: International Submarine Cables Damaged Japan US, APCN2, China US and PC-1 are gradually being repaired. Major cables linking Asia and the US Japan-US Damaged cable Recovered cable Undamaged cable Damaged Area PC-1 (To US) China-US APCN2 (To Taiwan) Copyright 2011 NTT Communications Corporation. All Rights Reserved. APCN2 TPE (To China, Korea, (To Taiwan, repaired on April 18) Korea) 12 PC-1 (To the US) Japan-US (Repaired on April 16)

14 Financial Impact of the Great East Japan Earthquake FY2010 FY2011 Forecasts Profit/loss Profit/loss Capital Investment NTT East Approx Approx Approx *1 *2 NTT DOCOMO Approx. 6.0 Approx Approx NTT Consolidated Approx Approx Approx *1 Includes special losses of approximately *2 The total capital investment for the fiscal year ending March 31, 2012 and onwards is approximately