1.2 Cable Description 1 Single Jacket/Non Armor Single and 50 or 62.5 Multi mode color coded fibers, jelly filled color coded loose tubes, PE filler if required, SZ-stranded around the d
Trang 1TECHNICAL SPECIFICATION
LOOSE TUBE / SINGLE JACKET
NON-ARMOR / JELLY FILLED CABLE
Trang 21 SCOPE
1.1 Application
This specification covers the general requirements for fiber optic telecommunication cables used for inter-building backbone in duct installation and lashed aerial use
1.2 Cable Description
1) Single Jacket/Non Armor
Single and 50 or 62.5 Multi mode color coded fibers, jelly filled color coded loose tubes, PE filler (if required), SZ-stranded around the dielectric central strength member, jelly filled, plastic tape, dielectric strength member and outer PE jacket
2 OPTICAL FIBER
1) Manufacturing process: MCVD
2) Fiber type: Matched clad fiber
The optical, geometrical and mechanical performance of the optical fiber shall be in accordance with Table 1 and 2 below
Table 1 The Optical, Geometrical and Mechanical Performance of the Multi Mode Fiber
SPECIFICATION
50 Multi Mode 62.5 Multi Mode
Attenuation DB/km 3.5 at 850nm
1.0 at 1300nm 1.0 at 1300nm3.5 at 850nm Bandwidth MHz.km 400 at 850nm
600 at 1300nm 500 at 1300nm200 at 850nm Numerical Aperture - 0.200.015 0.2750.015 Core Diameter 503.0 62.53.0 Core Non-circularity % 6.0 6.0
Cladding Diameter 1252.0 1252.0 Cladding Non-circularity % 2.0 2.0
Core/Cladding Concentricity Error 3.0 3.0
Coating Diameter 24515 24515 Proof Test Kpsi 100 100
*Note) Superior performance available upon request
Trang 3Table 2 The Optical, Geometrical and Mechanical Performance of the Single Mode Fiber
Attenuation dB/km 0.4 at 1310nm
0.25 at 1550nm Chromatic Dispersion Ps/nm.km 3.2 at 1285nm ~ 1330nm
18 at 1550nm Zero Dispersion Wavelength nm 1300 ~ 1324
Zero Dispersion Slope Ps/nm2.km 0.093
Cut-off Wavelength
(cc, 22m of a cabled fiber) nm 1270
Mode Field Diameter 9.31.0%
Mode Field Concentricity 0.8
Cladding Diameter 1251.0
Cladding Non-circularity % 1.0
Coating Diameter 24515
*Note) Superior performance available upon request
3 CABLE CONSTRUCTION
The construction of the cable shall be in accordance with Table 3 below
Table 3 Construction of the Cable
Number of Fibers 2 ~ 72
Type of Fiber 62.5 Multi Mode, 50 Multi Mode and Single Mode
No of Fibers per Tube Max 12
Material PBT (Polybutylene Terephthalate) Loose Buffer
Tube Diameter Nom 2.4 mm
Filling Compound
in Loose Buffer Tube Thixotropic Jelly Compound
Filling Compound
between Loose Buffer Tubes Polybuthane Type Jelly Compound
Central Strength Member FRP (Fiberglass Reinforced Plastic)
Core Wrapping Tape Plastic Tape
(To provide heat barrier and good forming of core)
Dielectric Strength Member
Glass yarn (To provide the required tensile strength together with the central strength member)
Material Black MDPE Outer Jacket
Thickness Min 1.25mm, Nom 1.8mm
Trang 44 FIBER AND LOOSE BUFFER TUBE IDENTIFICATION
The color code of the loose buffer tubes and the individual fibers within each loose buffer tube shall be in accordance with Table 4 below
Table 4 The Color Code of the Individual Fibers and Loose Tubes
No of Fibers/
Loose Buffer Tubes Color
No of Fibers/
Loose Buffer Tubes Color
5 PHYSICAL / MECHANICAL / ENVIRONMENTAL
PERFORMANCE
The mechanical and environmental performance of the cable shall be in accordance with Table 5 below Unless otherwise specified, all attenuation measurements required in this section shall be performed at 1550nm for single mode fiber (SM) and at 1300nm for multi mode fiber (MM)
Table 5 The Mechanical and Environmental Performance of the Cable
ACCEPTANCE CRITERIA
Tensile Loading
And Bending Test
# Test method: TIA/EIA-455-33A - Mandrel diameter: 30D (D = cable diameter) - Short term tensile load: 2,700N for 1 hour - Long term tensile load: 1,000N for 10 minutes
# Acceptance Criteria - Fiber strain: Less than 60% of the fiber proof strain
for short term tensile load - Attenuation increment: 0.10 dB (SM) 0.20 dB (MM)
for long term tensile load
Compressive Loading
Resistance Test
# Test method: TIA/EIA-455-41A - Applied load: 110 N/cm - Duration of loading: 10 minutes
# Acceptance Criteria - Attenuation Increment: 0.10 dB (SM)
Trang 5Table 5 The Mechanical and Environmental Performance of the Cable (continued)
ACCEPTANCE CRITERIA
Repeated Impact Test
# Test method: TIA/EIA-455-25B - Height of impact: 150mm - Drop hammer mass: 2.0kg - No of impact cycles: 25 cycles
# Acceptance Criteria - Attenuation Increment: 0.10 dB (SM) 0.20 dB (MM)
- No jacket cracking and fiber breakage
Cyclic Flexing Test
# Test method: TIA/EIA-455-104A - Sheave diameter: 20D (D = cable diameter) - No of flexing cycles: 25 cycles
- Flexing speed: 30 cycles/minute
# Acceptance Criteria - Attenuation Increment: 0.10 dB (SM) 0.20 dB (MM)
- No jacket cracking and fiber breakage
Cable Twist Test
# Test method: TIA/EIA-455-85A - Cable length twisted: 2m - No of twist cycles: 10 cycles - Twist angle: 180
# Acceptance Criteria - Attenuation Increment: 0.10 dB (SM) 0.20 dB (MM)
- No jacket cracking and fiber breakage
Temperature Cycling Test
# Test method: TIA/EIA-455-3A - Temperature cycling schedule : 23-3065-306523
- Soak time at each temperature: 8hours
# Acceptance Criteria - Attenuation increment: 0.15 dB/km (SM) 0.20 dB/km (MM)
Water Penetration Test
# Test method: TIA/EIA-455-82B - Length of specimen: 3m - Height of pressure head: 1m - Test time: 24 hours
# Acceptance Criteria - No leakage through the open cable end
Trang 66 PACKING AND MARKING
6.1 Cable Marking
The sheath shall be marked at intervals of one meter with following information
1) Cable type and fiber counts
2) Name of the manufacturer
3) Year of manufacture
4) Length marking
6.2 Cable Packing
6.2.1 Standard length of cable shall be 2km and 4km Other cable length is also available if required by customer
6.2.2 Each length of the cable shall be wound on a separate wooden reel
6.2.3 Both ends of the cable shall be sealed with a suitable plastic cap to prevent the entry of moisture during shipping, handling and storage
6.2.4 Wood-fiber board or circumference battens shall be laid on cable between flanges and fixed by steel bands
6.2.5 The cable ends shall be securely fastened to the reel to prevent the cable from becoming loose in transit or during placing operations
6.3 Cable Reel
6.3.1 Details given below shall be distinctly marked on a weather proof materials on both outer sides of the reel flange:
(1) Length of cable in meters
(2) Cable type and fiber counts
(3) Gross weight in kilograms
(4) Reel number
(5) Name of the manufacturer
(6) Year of manufacture
(7) Arrow showing the direction the drum shall be rolled
6.3.2 The cable shall be wound on the reel designed to prevent damages during shipment and installation
6.3.3 The arbor hole on each flange shall be lined with a metal plate
Trang 7< Cross-section Drawing of Cable >
12-Fiber Cable
1 Diameter, Weight and Minimum Bending Radius
Minimum Bending Radius (mm)
No of Fibers
Nominal Cable Diameter (mm)
Approx
Cable Weight (kg/km) Under Load No Load
*) Actual values for cable weight and diameter may deviate from the calculated values given
in the table above
== End of Specification ==
Optical Fibers Jelly Compound Loose Buffer Tube Filler(if necessary) Jelly Compound Dielectric CSM Core Wrapping Plastic Tape Dielectric Strength Member Outer PE Jacket