ANNEX 1: TECHNICAL SPECIFICATION OF 4F0 OPTICAL CABLE

1. General requirement
- Fiber count: 01~ 04 single mode fibers G.652D

1.1. Fiber structure

Operating wavelengths: 1310nm; 1383nm; 1550nm; 1625nm

1.2. Materials of fiber

Optic Fibers is made from high quality silicon glass material and is covered with
a layer of material UV protection material (cladding). Outer of fiber is encased with
color code material to distinguish.
- Core: Silica (SiO2) Doped Germanium Dioxide (GeO2).
- Cladding: Silica (SiO2)
- Primary coating: UV acrylate plastic
2. Cable structure
- The fibers is placed in loose buffer tube with filling compound (gel) in side that helps
the fiber to easily move inside the tube and protect the fiber from water penetration,
external forces as well as changes in temperature.
- Cable sheath made of black HDPE to protect cable from shock and environment.
- Cable structure as reference:
Messenger Ø1

PE outer sheath
Loose tube PBT
Fiber G.652D, Japan, US..

Filling compound
Water blocking yarn
 Content Requirements
Fiber conts Single mode fiber: 01~04Fo
Loose tube Diameter 2,2 ± 0,1 mm
Thixotropic Jelly Compound in loose tube, nontoxic
and does not affect these other components in the cable
as well as the color of the fiber.
Filling compound
No mildew and no freezing at low temperatures,
interfering with the movement of optical fibers in liquid
tubes
Steel wire Galvanize or copper steel wire, diameter ≥ 1,0mm
Messenger HDPE plastic, black
Outer sheath
Thickness ≥ 0,5 mm
HDPE plastic, black
Has uniform thickness and does not contain metal
Material
Outer sheath components. Resistant to ultraviolet rays, no cracks,
Evenly rounded and uniform color over the entire cable
Thickness Average ≥ 1,0 mm
01 polyeste water blocking yarn with coating water
Water blocking,
blocking pounder, lay along cable core to blocking
reinforcement
water and reinforce strength for cable
Diameter of round section part (contain loose tube, not include messenger): 4,0~5,0 mm

3. Specifications detail
No. Parameter Required Testing method
I Fibers
1.1 Geometrical characteristic
1.1.1 Fiber type Single mode G.652D
Mode field diameter Equipment Test follow test method in
ITU-T Rec G.650.1 (07/2010) part
1.1.2 At 1310nm 9,2µm ±0,4µm
5.1and IEC 60793-1- 45 (07/2001)
At 1550nm 10,4µm ±0,8µm Sample fiber 2 ±0.2m
- Equipment Test follow test method in
Cladding ITU-T Rec G.650.1 (07/2010) part 5.2
1.1.3 125,0µm ±1µm
diameter and IEC 60793-1-20 (09/2001)
- Sample fiber < 2m

1
No. Parameter Required Testing method
Primary - Equipment Test follow test method IEC
1.1.4 coating 245,0µm ± 5µm 60793-1-21 (08/2001)
diameter - Sample fiber < 2m

- Equipment Test follow test method

Core
in ITU-T Rec G.650.1 (07/2010) part
1.1.5 concentricity ≤ 0,5µm
5.2 and IEC 60793-1-20 (09/2001).
error
Sample fiber < 2m
- Equipment Test follow test method in
Cladding ITU-T Rec G.650.1 (07/2010) part 5.2
1.1.6 ≤ 1%
noncircularity and IEC 60793-1-20 (09/2001)
- Sample fiber < 2m
1.1.7 Color code TIA/EIA – 598
1.2 Transmission attribute
- Equipment Test follow test method in
Cable cut-off ITU-T Rec G.650.1 (07/2010) part 5.2
1.2.1 λ cc ≤ 1260 nm
wavelength and IEC 60793-1-20 (09/2001)
- Sample fiber < 2m
Attenuation: - Using OTDR
- Sample is the cable in new drums
1.2.2 At 1310nm ≤ 0,35 dB/km - The result of attenuation is equal to
the value of attenuation coefficient
At 1550 nm ≤ 0,25 dB/km 1km (dB/km)

Fiber macrobend loss Test method: ITU-T Rec

G.650.1(07/2010) part 5.6.1
- With R=30 mm; 100 turn -Circle the fiber 100 turns,
Mandrel Diameter: 60 mm
+ At 1550 nm ≤ 0,1 dB -Use powermeter to measure the
attenuation of this length of fiber
1.2.3 + At 1310 nm ≤ 0,1 dB
first( put the fiber straight, not bend,
- With R=50 mm; 100 turn not twist) and after bending
Acceptance Criteria: the attenuation
+ At 1310 nm ≤ 0,1 dB between 2 times of measure not
different over 0.1 dB at 1625
+ At 1550 nm ≤ 0,1 dB wavelength

2
2 Mechanical attribute of cable
Torsion Test
- Fibers not brake, shell no
- Follow IEC-60794-1-2-E7/EIA-445-85
cracked when viewed through
- Length of sample ≤ 2m
1.1 Microscop up 5 times
- Cycle 10; Speed 1 min/Cycle
- Loss increment ≤ 0.2dB at 1310nm
- Angle: ± 1800C
and 1550nm
- Load: 20 N
Strength and bending
- Follow IEC-60794-1-2-E1/EIA-445-33
- Loss increment ≤ 0.2dB at 1310nm
- Length of sample 150m with length for
and 1550nm
test device
2.2 - Fibers not brake, shell no
- Diameter of pully: ≥ 300mm
cracked
- Max loading: max loading when install
200N
- Time: 10 min
Impact
- Follow IEC-60794-1-2-E4/EIA-445-25 - Loss increment ≤ 0.2dB at 1310nm
- Hummer: 0,5kg and 1550nm
2.3 - Height: 50 cm - Fibers not brake, shell no
- Hit: 10 (each point apart cracked
Minimum 500mm)
- Temperature: 23 oC
Repeat bending
- Loss increment ≤ 0.2dB at 1310nm
- Follow IEC-60794-1-2-E6/EIA-445-104
and 1550nm
- Cycle: 25 time
2.4 - Fibers not brake, shell no
- Speed: 2s/cylce
cracked
- Angle: ± 900
- Speed: 2s/cylce
Crush resistance - Loss increment ≤ 0.2dB at 1310nm
- Follow IEC-60794-1-2-E3/EIA-445-41 and 1550nm
2.5
- Load: 700N/10cm - Fibers not brake, shell no
- Cycle: 1 point cracked
3 Environment requirement
The stability of attenuation when
temperature changes
- Follow IEC-60974-1-2-F1/EIA-445-3 - Loss increment ≤ 0.2dB at 1310nm
- Sample length: Enough for testing and 1550nm
3.1
- Range: - 100C to +600C - Fibers not brake, shell no
- Time at each Temperature peak: 6 hours Cracked
- Times for a cycle: 6 hours
- Number of cycle: 02
3.2 Water blocking No water leakage through the open cable end

3
 - Follow IEA-60794-1-2-F5/EIA-445- 82
- Sample length: 3m
- Hight of water column: 1 m
- Time: 24h
Filling compound test
- Follow IEA-60794-1-2-E14/EIA-445- 81
-Samples number: 5 samples
-Length of sample 300mm ± 5mm
-Take off outer sheath about 130mm ±
2.5mm, the take off cable‘s elements and left Acceptance criteria : Filling compound fall out
3.3 less than 0.05g
the loose tubes uncuted with length 80mm ±
2.5mm
- Hang the sample vertically wtih the taked
off end below without sealing.
-Testing temperature : 60±5oC
-Time to test : 24hrs
4 Working conditions
Hang on the poles
Span 50m
4.1 Fiber srink back in the cable ≤ 0,03%
Sag 1%
Load 200N at each pole
4.2 Life time ≥ 10 năm
4.3 Acceptance bending radius ≤ 20D
4.4 Operating temperature -10oC to + 60 oC