ANCIT WORKSHOP Torino, March 1998 Conversion to simple underground facility network under modern underground facility technologies Taishi Deguchi NTT Access Network Systems Laboratories

ANCIT WORKSHOP Torino, March 1998 Social Background in Japan

ANCIT WORKSHOP Torino, March 1998 Social Background in Japan Expansion of Underground Facilities

ANCIT WORKSHOP Torino, March 1998 Social Background in Japan Expansion of Underground Facilities Restrictions on Underground Work

ANCIT WORKSHOP Torino, March 1998 Social Background in Japan Expansion of Underground Facilities Restrictions on Underground Work Provision of Basic Facilities using Social Capital

ANCIT WORKSHOP Torino, 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 WORKSHOP Torino, March 1998 NTT Building User Buildings / Houses Configuration of Simplified Basic Facilities for Underground Networks

ANCIT WORKSHOP Torino, March 1998 Cable Tunnels Trunk Conduits Configuration of Simplified Basic Facilities for Underground Networks

ANCIT WORKSHOP Torino, March 1998 Shared Facilities Configuration of Simplified Basic Facilities for Underground Networks Cable Tunnels Trunk Conduits General Conduits

ANCIT WORKSHOP Torino, March 1998 Distribution Conduits Configuration of Simplified Basic Facilities for Underground Networks General Conduits Shared Facilities Cable Tunnels Trunk Conduits

ANCIT WORKSHOP Torino, March 1998 Cable Tunnels Routes Scheduled to be Provided Aged Conduits Existing Conduits Example of Integrating Routes Conventional

ANCIT WORKSHOP Torino, March 1998 Cable Tunnels Trunk Conduits Use of Existing Conduits Example of Integrating Routes Future

ANCIT WORKSHOP Torino, March 1998 [Route Classification] Fundamental Concepts for the Provision of Basic Facilities Routes that will become necessary in the future

ANCIT WORKSHOP Torino, 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 flexible and simple facilities Planned construction and maintenance of facilities

ANCIT WORKSHOP Torino, 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 flexible and simple facilities Effective use of existing facilities Planned construction and maintenance of facilities Prolongation of life of existing facilities

ANCIT WORKSHOP Torino, 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 flexible and simple facilities Effective use of existing facilities Planned construction and maintenance of facilities Prolongation of life of existing facilities

ANCIT WORKSHOP Torino, 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 flexible and simple facilities Effective use of existing facilities Planned construction and maintenance of facilities Prolongation of life of existing facilities

ANCIT WORKSHOP Torino, March 1998 [Route Classification] Provision of flexible and 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 and maintenance of facilities Prolongation of life of existing facilities Use of distribution facilities Lending facilities to other companies Elimination of unused facilities

ANCIT WORKSHOP Torino, March 1998 Promotion of productivity improvements [Environment] Replacement of cables for bringing “Fiber to the home” Lending facilities to other companies Spreading superannuation of facilities Trends within and outside the Company and Service Tools

ANCIT WORKSHOP Torino, 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 for bringing “Fiber to the home” Lending facilities to other companies Spreading superannuation of facilities

ANCIT WORKSHOP Torino, March 1998 [Service Tools] Smoothening of business Management of facilities Management of installation space [Topics] Trends within and outside the Company and Service Tools Promotion of productivity improvements [Environment] Replacement of cables for bringing “Fiber to the home” Lending facilities to other companies Spreading superannuation of facilities Free access Shared use Simplification & Flexibility Effective use

ANCIT WORKSHOP Torino, March 1998 Facilities data Maps data Ground data Users data Capacity Position Aging status Cable data Facilities Management System Shared Database System Paper maps available in the market Urban plans Conversion to electronic data

ANCIT WORKSHOP Torino, March 1998 Facilities data Maps data Ground data Users data Capacity Position Aging status Cable data Facilities Management System Shared Database System Conversion to electronic data Offer the required data Paper maps available in the market Urban plans

ANCIT WORKSHOP Torino, March 1998 Facilities data Maps data Ground data Users data Capacity Position Aging status Cable data Facilities Management System Shared Database System Conversion to electronic data Applications Shared use of facilities Construction plan Maintenance Offer the required data Paper maps available in the market Urban plans

ANCIT WORKSHOP Torino, March 1998 Subscriber lead-in conduit Single conduit System Configuration of New Underground Distribution Facility Single conduit2 ~ 6 inches DiameterComponents 1 or 2 inches 2 ~ 6 inches Subscriber lead-in conduit Modified branch conduit

ANCIT WORKSHOP Torino, March 1998 System Configuration of New Underground Distribution Facility Single conduit Lead-in cable Distribution cable Single conduit2 ~ 6 inches DiameterComponents 1 or 2 inches 2 ~ 6 inches Subscriber lead-in conduit Modified branch conduit

ANCIT WORKSHOP Torino, March 1998 Conventional Type Conduits Arrangement Occupancy ratio ; 100% Concept of Trunk Conduit

ANCIT WORKSHOP Torino, March 1998 Free-space Conduit Arrangement Equal space for installing optical fiber cable cores in Compactness Conventional Type Conduits Arrangement Occupancy ratio ; 100% Concept of Trunk Conduit Occupancy ratio ; 50% Outer pipe Inner pipes

ANCIT WORKSHOP Torino, March 1998 Outer pipe Inner pipes Manhole side wall Duct sleeve Inner pipes fixing socket Arrangement of Free-space Conduit

ANCIT WORKSHOP Torino, March 1998 Large diameter optical fiber cable Cables of other companies, etc. Metalic cable (temporarily placed) Arrangement of Free-space Conduit

ANCIT WORKSHOP Torino, March 1998 Inner pipes Arrangement of Free-space Conduit

ANCIT WORKSHOP Torino, March 1998 Small diameter optical fiber cable Free space Arrangement of Free-space Conduit

ANCIT WORKSHOP Torino, March 1998 Pit High density installation of cables Installation technique of concentrating cable connection points in pit Cable Tunnel High Density Cable Tunnel

ANCIT WORKSHOP Torino, March 1998 Pit 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 WORKSHOP Torino, March 1998 Examples of Aseismatic Technologies

ANCIT WORKSHOP Torino, 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 WORKSHOP Torino, March 1998 by FAX ; by ; Taishi Deguchi NTT Access Network Systems Laboratories Please notify me of questions that I could not answer to today or of additional questions