NTT Communications’ Disaster Preparedness Initiatives

NTT Communications' relay transmission paths use multiple routes throughout the country, ensuring that even if one route is affected by a disaster, the system can automatically switch to alternative routes to maintain the availability of communication services.

Multi-routing network

NTT Communications continually enhances the physical strength of its facilities and builds highly reliable communications infrastructure capable of withstanding disasters and other challenges.

 

Wind and Water-related Disasters

• Measures to protect against floods, ocean tides and heavy snow, including the use of waterproof panels and walls to protect machine rooms
• Wind-pressure designs to enable buildings to withstand typhoons

 

Fire Prevention

• Fire shutters and fire doors to prevent the spread of fires
• Gas-based fire-suppression systems installed in rooms housing electronic communications equipment
• Flame-retardant and fire-resistant cables to prevent fires

 

Earthquake Resistance (Indoor Equipment)

• Seismic racks and other measures to withstand a quake registering 7 on Japan’s seismic-intensity scale

NTT Communications is steadily improving its buildings in terms of equipment (power supply, air conditioning, etc.) and access control (entry/exit) to ensure appropriate security levels for the IT age.

Fire prevention and resistance are priorities in all buildings operated by NTT Communications.

 

Fireproofing of exterior walls against surrounding fires

• Fire shutters and doors

Gas-based fire suppression systems in machine rooms

Fire-retardant and fire-resistant cables

Seismic measures are taken to maintain communications during major earthquakes.

 

Communication Buildings

• Built to withstand a quake registering 7 on Japan’s seismic-intensity scale, such as the Great Hanshin-Awaji Earthquake
• Seismic-resistant telecommunications equipment, racks, etc.

Power-generation Equipment Systems

• Water supply for system startup as well as fuel lines

Storage Batteries

• Seismic-resistant racks for sealed storage batteries and liquid lead-acid batteries.

Underground Pipelines

• Seismic reinforcement of connection points

NTT Communications maintains a highly reliable backup system consisting of batteries, emergency engines and power-supply vehicles for use during prolonged power outages due to disasters (see routes 1 to 4 below).

When disasters are reported on television and other media, typically there is an immediate influx of phone calls from people nationwide seeking information or expressing sympathy. To alleviate congestion and ensure uninterrupted phone communications with the affected area, measures are taken to control remote exchanges, such as limiting the number of calls at a given time.