Optical Network Construction in Customer Premises

1
Optical Network Constructionin Customer Premises
by Sadaaki TAKANO NTT Access Network Systems
Laboratories
2
Typical Model of Optical Access Network in Japan
Business Building
3
Key Point of New Optical Distribution System for
Customer Premises

• Cost Reduction
• Adaptability to

Demand Fluctuation Terminal Replace Service
Upgrade
4
Typical Model of Optical Network Construction in
Customer Premises
Premises Optical Fiber Cable
Distribution Cabinet
Mini-MPO Connector
Optical Outlet Box
Under-Carpet Cable
Indoor Cable
Field-Installable Single-Fiber Connector
Floor Distribution Pipe Cable
Premises Pipe Cable
Termination Cabinet
Termination Cable
Outside Cable
5
Premises Optical Fiber Cable Structure
Mono-coated Fiber (Diameter 0.25mm)
Wrapping Tape
4-Fiber Bundle
Slotted-rod (SZ-structure)
Sheath
Strength Member ( Steel Wire )
100 Fibers Cable
Reverse
Optical Fiber
Easy Mid-span Access
8,12,24,40
60,80,100
Number of Fiber
Diameter
13.5 mm
15 mm
Cable Variety
6
Pipe Cable Structure
Outer Coating
Pipe
Notch
Sheath
Coated Optical Fiber
Strength Member ( Steel Wire )
Outer Dimension 9.5 9.5mm

20 Pipes Cable
8 Core Optical Fiber Unit
1 Pipe Floor Distribution Cable
Number of Pipe
4
10
20
1, 2
4, 6, 8
Number of Fiber
Diameter (mm)
20
31
37
Diameter (mm)
1.0
1.5
Cable Variety
Unit Variety
7
Optical Fiber Feeding Technology
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
Feeding Direction
Controller
Pipe Connector
(1) Several hundreds meters optical fiber
installation without a fiber joint (2) High
speed fiber installation 10 30 m/min.
Technical Features
8
Distribution Cable Structure
Notch
Strength Member ( Steel Wire )
Mono-coated Fiber (Diameter 0.25mm)
Sheath
Optical Fiber Cord (Diameter 1.5mm)
Indoor Optical Cable
Notch
Strength member ( Steel Wire )
Sheath
Notch
Mono-coated Fiber (Diameter 0.25mm)
Termination Cable
Flat-Floor Optical Cable
Termination Cable
Indoor Cable
Under-carpet Cable
1, 2
1, 2
1
2
Number of Fiber
1.6
3.8
1.4
3.6
2.6
3.8
2.6
5.8
Outer Dimension
Cable Variety
9
Cabinet Specification
Type
Termination
Distribution
Outside
Premises
Cable
Premises
Distribution
Distribution
Connector
SC
Fusion Splice or SC
Size variety
SS, S, M, L
SS, S, M
Size
SS
S
M
L
8
40
120
200
Number of Fiber Connector
Dimension
Height
215
390
850
1500
(mm)
Width
326
440
440
440
Depth
63
100
100
190
Weight
(kg)
2
5
9
39
10
Cabinet Inner Structure
Optical Cord
Fun-out Module
SC-connector
Splice Point
Outside Cable Fixer
Organizer
Double Door
Distribution Cable Fixer
Premises Cable Fixer
Comparison to old model
Article cost 50 cut
Work cost 20 cut
Volume 50 cut
Termination Cabinet S
11
Organizer Structure
SC-connector Pigtail Cord
Av.
Max.
to Fun-out Module
(dB)
(dB)
Cord Clamp
Accommodating
0.24
0.78
Splice
Re-accommodating
0.18
0.33
Measurement Wavelength 1.55 micron
Loss Change Caused By Fiber Handling
to next Floor
Double Door
Spare Length for Fiber Splice
12
Field-istallable SC-connector Structure
Mechanism of connecting
Mechanical Splicing Part
Connector Plug
Internal Optical Fiber
Mechanical Splicing Part
Rubber Boot
(1)
Internal Optical Fiber
Optical Fiber
(2)
Wedge
Wedge Insertion
(3)
Connector Plug
Clamp Spring
(4)
Housing
13
Connector Assembly Time and Insertion Loss
Histogram
Av. Max. Min.
0.30 dB 0.97 dB 0.02 dB ( N 110 )
Av. Max. Min.
2.6 min. 4.2 min. 1.9 min. ( N110 )
Fiber SM 1.55 micron
Number of connectors
Number of connectors
Connector Assembly Time (min.)
Insertion Loss (dB)
14
Mini-MPO Connector
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.
2-Fiber Ribbon (2 to 4 fibers)
Ferrule
Plug
Adapter
Plug
Features
-
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
Insertion loss Av. 0.12 dB Max.
0.41 dB (N50)
15
Compact Mass-Fusion Splicer
Technical Points
Splice picture
Compact and Lightweight 15 15 15 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)
Wind Protection
Reinforcing
Battery
LSD Indicator
Operation Switch
16
Cost Comparison of Cabling
80 Core Optical Fiber Cable
10 Pipes Cable 8 Core Units 40 Core
Optical Fiber Cable 40 Core
Optical Fiber Cable
Cost Ratio per 1 Core ( Ratio1 when 80 core out
of 80 Core Cable is used)
Conclusive Demand
Optical Fiber Cable
Expanding Demand
Pipe Cable
Demand (Optical Fiber Core)
17
Set Up Form of Cabinet
Centralization
Dispersion
Cabinet
Cabinet
Easy to through The Fire Resistant Floor
Difficult to through The Fire Resistant Floor
18
Thank you for your kind attention.
If you have question, please ask me by E-mail or
Fax. E-mail takano_at_ansl.ntt.co.jp Fax 81
298 52 2529