ANCIT WORKSHOPTorino, 30-31 March 1998

Conversion to simple underground facility network under modern und

erground facility technologies

Taishi DeguchiNTT Access Network Systems Laboratories

ANCIT WORKSHOPTorino, 30-31 March 1998

Social Background in Japan

ANCIT WORKSHOPTorino, 30-31 March 1998

Social Background in Japan

• Expansion of Underground Facilities

ANCIT WORKSHOPTorino, 30-31 March 1998

Social Background in Japan

• Expansion of Underground Facilities

• Restrictions on Underground Work

ANCIT WORKSHOPTorino, 30-31 March 1998

Social Background in Japan

• Expansion of Underground Facilities

• Restrictions on Underground Work

• Provision of Basic Facilities using Social Capital

ANCIT WORKSHOPTorino, 30-31 March 1998

Social Background in Japan

• Expansion of Underground Facilities

• Restrictions on Underground Work

• Provision of Basic Facilities using Social Capital

• Ensuring Reliability during Earthquake

ANCIT WORKSHOPTorino, 30-31 March 1998

NTT Building

User Buildings / Houses

Configuration of Simplified Basic Facilities for Underground Networks

ANCIT WORKSHOPTorino, 30-31 March 1998

Cable Tunnels

Trunk Conduits

Configuration of Simplified Basic Facilities for Underground Networks

ANCIT WORKSHOPTorino, 30-31 March 1998

Shared Facilities

Configuration of Simplified Basic Facilities for Underground Networks

Cable Tunnels

Trunk Conduits

General Conduits

ANCIT WORKSHOPTorino, 30-31 March 1998

Distribution Conduits

Configuration of Simplified Basic Facilities for Underground Networks

General Conduits

Shared Facilities

Cable Tunnels

Trunk Conduits

ANCIT WORKSHOPTorino, 30-31 March 1998

Cable Tunnels

Routes Scheduled to be Provided

Aged Conduits

Existing Conduits

Example of Integrating Routes

Conventional

ANCIT WORKSHOPTorino, 30-31 March 1998

Cable Tunnels

Trunk Conduits

Use of Existing Conduits

Example of Integrating Routes

Future

ANCIT WORKSHOPTorino, 30-31 March 1998

[Route Classification]

Fundamental Concepts for the Provision of Basic Facilities

Routes that will become necessary in the future

ANCIT WORKSHOPTorino, 30-31 March 1998

[Route Classification] [Topics] [Detailed Plans]

Fundamental Concepts for the Provision of Basic Facilities

Routes that will become necessary in the future

Provision of flexibleand simple facilities

Planned construction andmaintenance of facilities

ANCIT WORKSHOPTorino, 30-31 March 1998

[Route Classification] [Topics] [Detailed Plans]

Fundamental Concepts for the Provision of Basic Facilities

Routes that will become necessary in the future

Provision of flexibleand simple facilities

Effective use of existing facilities

Planned construction andmaintenance of facilities

Prolongation of life of existing facilities

ANCIT WORKSHOPTorino, 30-31 March 1998

[Route Classification] [Topics] [Detailed Plans]

Fundamental Concepts for the Provision of Basic Facilities

Routes that are not necessary in the future

Routes that will become necessary in the future

Provision of flexibleand simple facilities

Effective use of existing facilities

Planned construction andmaintenance of facilities

Prolongation of life of existing facilities

ANCIT WORKSHOPTorino, 30-31 March 1998

[Route Classification] [Topics] [Detailed Plans]

Fundamental Concepts for the Provision of Basic Facilities

Routes that are not necessary in the future

Effective utilization for new needs

Routes that will become necessary in the future

Use of distribution facilities

Lending facilities to other companies

Provision of flexibleand simple facilities

Effective use of existing facilities

Planned construction andmaintenance of facilities

Prolongation of life of existing facilities

ANCIT WORKSHOPTorino, 30-31 March 1998

[Route Classification]

Provision of flexibleand simple facilities

[Topics] [Detailed Plans]

Routes that are not necessary in the future

Effective use of existing facilities

Effective utilization for new needs

Reduction of assets

Fundamental Concepts for the Provision of Basic Facilities

Routes that will become necessary in the future

Planned construction andmaintenance of facilities

Prolongation of life of existing facilities

Use of distribution facilities

Lending facilities to other companies

Elimination of unused facilities

ANCIT WORKSHOPTorino, 30-31 March 1998

Promotion of productivity improvements

[Environment]

Replacement of cables forbringing “Fiber to the home”

Lending facilities to other companies

Spreading superannuation of facilities

Trends within and outside the Company and Service Tools

ANCIT WORKSHOPTorino, 30-31 March 1998

Simplification &Flexibility

Effective use

Free access

Shared use

[Topics]

Trends within and outside the Company and Service Tools

Promotion of productivity improvements

[Environment]

Replacement of cables forbringing “Fiber to the home”

Lending facilities to other companies

Spreading superannuation of facilities

ANCIT WORKSHOPTorino, 30-31 March 1998

[Service Tools]

Smoothening ofbusiness

Management offacilities

Management ofinstallation space

[Topics]

Trends within and outside the Company and Service Tools

Promotion of productivity improvements

[Environment]

Replacement of cables forbringing “Fiber to the home”

Lending facilities to other companies

Spreading superannuation of facilities

Free access

Shared use

Simplification &Flexibility

Effective use

ANCIT WORKSHOPTorino, 30-31 March 1998

Facilities data

Maps data

Ground data

Users data

Capacity

Position

Aging status

Cable data

Facilities Management System

Shared Database System

Paper mapsavailablein the market

Urban plans

Conversion toelectronic data

ANCIT WORKSHOPTorino, 30-31 March 1998

Facilities data

Maps data

Ground data

Users data

Capacity

Position

Aging status

Cable data

Facilities Management System

Shared Database System

Conversion toelectronic data

Offer the required data

Paper mapsavailablein the market

Urban plans

ANCIT WORKSHOPTorino, 30-31 March 1998

Facilities data

Maps data

Ground data

Users data

Capacity

Position

Aging status

Cable data

Facilities Management System

Shared Database System

Conversion toelectronic data

Applications

Shared use of facilities

Construction plan

MaintenanceO

ffer the required data

Paper mapsavailablein the market

Urban plans

ANCIT WORKSHOPTorino, 30-31 March 1998

Subscriber lead-in conduit

Single conduit

System Configuration of New Underground Distribution Facility

Single conduit 2 ~ 6 inches

DiameterComponents

1 or 2 inches

2 ~ 6 inches

Subscriber lead-in conduit

Modified branch conduit

Modified branch conduit

ANCIT WORKSHOPTorino, 30-31 March 1998

System Configuration of New Underground Distribution Facility

Single conduit

Lead-in cable

Distribution cable

Single conduit 2 ~ 6 inches

DiameterComponents

1 or 2 inches

2 ~ 6 inches

Subscriber lead-in conduit

Modified branch conduit

ANCIT WORKSHOPTorino, 30-31 March 1998

Conventional Type Conduits Arrangement

Occupancy ratio ; 100%

Concept of Trunk Conduit

ANCIT WORKSHOPTorino, 30-31 March 1998

Free-space Conduit Arrangement

Equal spacefor installing optical fibercable cores in

Compactness

Conventional Type Conduits Arrangement

Occupancy ratio ; 100%

Concept of Trunk Conduit

Occupancy ratio ; 50%

Outer pipe

Inner pipes

ANCIT WORKSHOPTorino, 30-31 March 1998

Outer pipe

Inner pipes

Manhole side wall

Duct sleeve

Inner pipes fixing socket

Arrangement of Free-space Conduit

ANCIT WORKSHOPTorino, 30-31 March 1998

Large diameter optical fiber cable

Cables of other companies, etc.

Metalic cable(temporarily placed)

Arrangement of Free-space Conduit

ANCIT WORKSHOPTorino, 30-31 March 1998

Inner pipes

Arrangement of Free-space Conduit

ANCIT WORKSHOPTorino, 30-31 March 1998

Small diameter optical fiber cable

Free space

Arrangement of Free-space Conduit

ANCIT WORKSHOPTorino, 30-31 March 1998

PitPit

High density installation of cables

Installation technique of concentrating cable connection points in pit

Cable Tunnel

High Density Cable Tunnel

ANCIT WORKSHOPTorino, 30-31 March 1998

PitPit

High density installation of cables

Installation technique of concentrating cable connection points in pit

Cable Tunnel

High Density Cable Tunnel

Shared use

Space used by NTT

Space used by other companies

ANCIT WORKSHOPTorino, 30-31 March 1998

Examples of Aseismatic Technologies

ANCIT WORKSHOPTorino, 30-31 March 1998

Expansible and flexible joint for open-cut cable tunnel

Steel fiber mixing into manhole duct concrete

Flexible conduit for building access facilities

Examples of Aseismatic Technologies

ANCIT WORKSHOPTorino, 30-31 March 1998

• by FAX ; +81 298 52 2676

• by E-mail ; deg@ansl.ntt.co.jp

Taishi DeguchiNTT Access Network Systems Laboratories

Please notify me of questions that I could notanswer to today or of additional questions