ANCIT WORKSHOP Torino, March 1998 Optical Network Construction in Customer Premises by Sadaaki TAKANO NTT Access Network Systems Laboratories

ANCIT WORKSHOP Torino, March 1998 Business Building Typical Model of Optical Access Network in Japan

ANCIT WORKSHOP Torino, March 1998 Key Point of New Optical Distribution System for Customer Premises Cost Reduction Adaptability to Demand Fluctuation Terminal Replace Service Upgrade

ANCIT WORKSHOP Torino, March 1998 Premises Optical Fiber Cable Under-Carpet Cable Outside Cable Field-Installable Single-Fiber Connector Termination Cable Termination Cabinet Premises Pipe Cable Indoor Cable Floor Distribution Pipe Cable Optical Outlet Box Distribution Cabinet Typical Model of Optical Network Construction in Customer Premises Mini-MPO Connector

ANCIT WORKSHOP Torino, March 1998 Mono-coated Fiber (Diameter : 0.25mm) Wrapping Tape Slotted-rod (SZ-structure) Sheath 4-Fiber Bundle Premises Optical Fiber Cable Structure Easy Mid-span Access Reverse Strength Member ( Steel Wire ) 100 Fibers Cable Number of Fiber Diameter Cable Variety 8,12,24,4060,80, mm15 mm Optical Fiber

ANCIT WORKSHOP Torino, March 1998 Notch Pipe Sheath 8 Core Optical Fiber Unit 20 Pipes Cable 1 Pipe Floor Distribution Cable Coated Optical Fiber Outer Coating Pipe Cable Structure Outer Dimension : mm Strength Member ( Steel Wire ) Number of Pipe Diameter (mm) Cable Variety Number of Fiber Diameter (mm) Unit Variety 1, 24, 6,

ANCIT WORKSHOP Torino, March 1998 With this technology, optical fiber can easily installed in a small diameter pipe using drag force caused by blowing air and mechanical driving force. Optical Fiber Unit Supply Fiber Feeding Head Pipe Connector Pipe Controller (1) Several hundreds meters optical fiber installation without a fiber joint (2) High speed fiber installation : 10 ~ 30 m/min. Technical Features Optical Fiber Feeding Technology Feeding Direction

ANCIT WORKSHOP Torino, March 1998 Notch Mono-coated Fiber (Diameter : 0.25mm) Sheath Strength Member ( Steel Wire ) Flat-Floor Optical Cable Indoor Optical Cable Termination Cable Sheath Notch Mono-coated Fiber (Diameter : 0.25mm) Optical Fiber Cord (Diameter : 1.5mm) Strength member ( Steel Wire ) Distribution Cable Structure Number of Fiber Outer Dimension 1, Indoor Cable Under-carpet Cable Termination Cable 1, Cable Variety

ANCIT WORKSHOP Torino, March 1998 SizeSSSML Number of Fiber Connector DimensionHeight (mm)Width Depth Weight(kg)25939 Cabinet Specification Type TerminationDistribution OutsidePremises CablePremisesDistribution ConnectorSC Fusion Splice or SC Size varietySS, S, M, LSS, S, M

ANCIT WORKSHOP Torino, March 1998 Fun-out Module Optical Cord Organizer Cabinet Inner Structure Outside Cable Fixer Termination Cabinet S SC-connector Splice Point Double Door Premises Cable Fixer Distribution Cable Fixer Comparison to old modelArticle cost : 50 % cut Work cost : 20 % cut Volume : 50 % cut

ANCIT WORKSHOP Torino, March 1998 SC-connector Pigtail Cord Spare Length for Fiber Splice to next Floor Organizer Structure Splice Double Door to Fun-out Module Cord Clamp Av.Max. (dB) Accommodating Re-accommodating Measurement Wavelength : 1.55 micron Loss Change Caused By Fiber Handling

ANCIT WORKSHOP Torino, March 1998 Mechanical Splicing Part Connector Plug Housing Rubber Boot Wedge Insertion Internal Optical Fiber (1) (2) (3) (4) Mechanical Splicing Part Internal Optical Fiber Connector Plug Optical Fiber Wedge Clamp Spring Field-istallable SC-connector Structure Mechanism of connecting

ANCIT WORKSHOP Torino, March 1998 Number of connectors Connector Assembly Time (min.) Connector Assembly Time and Insertion Loss Histogram Av. Max. Min. = 0.30 dB = 0.97 dB = 0.02 dB ( N = 110 ) Fiber : SM 1.55 micron Number of connectors Insertion Loss (dB) Av. Max. Min. = 2.6 min. = 4.2 min. = 1.9 min. ( N=110 )

ANCIT WORKSHOP Torino, March 1998 Mini-MPO Connector 2-Fiber Ribbon (2 to 4 fibers) Ferrule Plug Adapter Plug The Mini-MPO connector is a smaller version of the MPO connector. It was developed in order to meet the emerging need for high density duplex connection. - Employs a reduced size MT style ferrule and MPO style housing - Precise guide pin alignment and easy push-pull coupling - High density: two and four fibers terminated in a 7 x 10 mm plug Features Insertion loss Av. : 0.12 dB Max. : 0.41 dB (N=50)

ANCIT WORKSHOP Torino, March 1998 Splice picture Reinforcing Wind Protection Battery Operation Switch LSD Indicator Compact Mass-Fusion Splicer Compact and Lightweight : cm : 3 kg Connection Loss : 0.11 dB (Av.) Splice Time : 6 min. (4-Fiber Ribbon) Driving with Battery Applicable to mono fiber, 2 or 4-Fiber Ribbon Low Price : 1 / 4 (comparison to old model) Technical Points

ANCIT WORKSHOP Torino, March 1998 : 80 Core Optical Fiber Cable : 10 Pipes Cable + 8 Core Units : 40 Core Optical Fiber Cable + 40 Core Optical Fiber Cable Demand (Optical Fiber Core) Cost Ratio per 1 Core ( Ratio=1 when 80 core out of 80 Core Cable is used) Conclusive Demand Expanding Demand Optical Fiber Cable Pipe Cable Cost Comparison of Cabling

ANCIT WORKSHOP Torino, March 1998 Set Up Form of Cabinet Dispersion Centralization Easy to through The Fire Resistant Floor Difficult to through The Fire Resistant Floor Cabinet

ANCIT WORKSHOP Torino, March 1998 Thank you for your kind attention. If you have question, please ask me by or Fax. Fax :