1. General

This specification covers the design and performance of the single mode optical cables to be used in indoor/outdoor application.

1.1  Cable Description

•  1 G.657A2 SM-fibers.
• Tight Buffer (not semi-tight buffer).
• duct / facade and / or aerial for FTTX applications.

1.2  Quality

Huawei ensures a continuing level of quality in our cable products through several programs including ISO 9001.

1.3  Reliability

Huawei ensures product reliability through rigorous qualification testing of each product family.  Both initial and periodic qualification testing are performed to assure the cable’s performance and durability in the field environment.

1.4  Reference

ITU-T G.657	Characteristics of a bending-loss insensitive single-mode optical fibre and cable for the access network
03/E-3316	Telecom Standard of Single-mode Optical Fiber
IEC 60794-1-1	Optical fiber cables- part1-1-Generic specification-General
IEC 60794-1-2	Optical fiber cables- part1-2-Generic specification-Basic optical cable test procedure
IEC 60794-2	Optical fiber cables- part2- Indoor cables-Sectional specification
IEC 60794-2-20	Optical fiber cables- part2-20- Indoor cables-Family specification for multi-fiber optical distribution cables

1.1  Working Condition

Transportation and storage temperature: -40℃～+70℃

Installation temperature: -5℃～+60℃

Operation temperature: -15℃～+65℃

1.2  Minimum Allowable Bending Radius

Static: 5D

Dynamic: 20D

D is the out diameter of the cable

1.3  Life Time

Optical fiber cables supplied in compliance with the specifications can be capable of withstanding the typical service condition  for a period of twenty-five (25) years without detriment to the transmission or operation and maintenance characteristics of the cable.

 

1. Optical Fiber In Cable(ITU-G.657A2)

Optical properties of the SM fiber are achieved through a germanium doped silica based core with a pure silica cladding which meets ITU-T G.657, UV curable acrylate protective coating is applied over the glass cladding to provide the necessary maximum fiber lifetime.

Geometrical, optical, and mechanical characteristics of fiber in cable as the following table:

Category	Description	Specification
		Before cable	After cable
Geometrical Characteristics	Cladding diameter	125.0 ± 0.7 mm
	Cladding non-circularity	£ 1.0 %
	Coating diameter	245± 10 mm(Before Colored) 250 ± 15 mm (Colored)
	Fiber curl (Radius)	³ 4 m
	Core concentricity error	£ 0.5 mm
Optical Characteristics	Mode field diameter at 1310 nm	8.6-8.8  ± 0.4mm
	Mode field diameter at 1550 nm	9.6-9.8 ± 0.5 um
	Point discontinuity	£ 0.05dB
	Attenuation at 1310 nm	£ 0.35 dB/km	£ 0.4 dB/km
	Attenuation at 1383 nm	£ 0.34 dB/km	£ 0.4dB/km
	Attenuation at 1550 nm	£ 0.21 dB/km	£ 0.25 dB/km
	Attenuation at 1625 nm	£ 0.23 dB/km	£ 0.3 dB/km
	Dispersion in 1285 – 1330 nm	£ 3.2 ps/(nm·km)
	Dispersion in 1271 – 1360 nm	£ 5.3 ps/(nm·km)
	Dispersion at 1550 nm	£ 18 ps/(nm·km)
	Dispersion at 1625 nm	£ 23 ps/(nm·km)
	Zero dispersion wavelength	1300 – 1324 nm
	Zero dispersion slope	£ 0.092 ps/(nm2·km)
	Cable cut-off wavelength	£ 1260 nm
	Polarization mode dispersion individual fiber	£ 0.2 ps/Ökm
	Polarization mode dispersion design link value (M=20, Q=0.01%)	£ 0.1 ps/Ökm
	Macro-bend loss (10 turns, 15mm radius,)	£0.03 dB at 1550nm £ 0.1 dB at 1625nm
	Macro-bend loss (1 turns, 10mm radius,)	£ 0.1 dB at 1550nm £ 0.2 dB at 1625nm
	Macro-bend loss (1 turns, 7.5mm radius,)	£ 0.5 dB at 1550nm £ 1.0 dB at 1625nm
	Mating with G.652D cable	There will be 30 (Thirty) Mergers. Take 20m Fiber for each Joint.  A maximum value of attenuation splicing <0,25dB for both directions is ensured, the measurement will take place bidirectionally and the attenuation value will be the average.
Mechanical Specification	Proof stress level	³100kpsi (0.69 GPa)

 

2. Optical Cable

3.1  General Design

An inner cable is housed in cable.

Aramid yarns are applied as strength member.

HDPE is applied over the cable core as outer sheath.

3.2  Construction

3.2.1 Cross Section of Cable

 

3.2.1 Dimensions and Descriptions of Cable Constructions

Item	Contents	Value
Tight Buffer	Fiber counts	1
	Diameter(mm)	0.9 ± 0.05
	Tight buffer color	Blue
Inner sheath	Material	LSZH
	Color	Ivory (RAL 9001 △E≤4)
	Thickness (mm)	0.4 ± 0.1
Inner cable	Diameter	2.2 ± 0.1
Strength member	Material	Water blocking aramid yarn
Outer Sheath	Material	HDPE
	Color	Black
	Thickness (mm)	≥0.8
FRP	Diameter(mm)	0.6 ± 0.1
Ripcord (1 pcs)	Color	Red (≥1500 denier，should be able to rip a 5 m long sheath / armor structure without breaking)
Color stripe	Color	Blue ( RAL5005 △E≤4 )
	Width (mm)	1.5-2.0mm
Ovalling		≤10% O = 100.(Dmax–Dmin)/Dnom%
Cable diameter(mm).		5.0 ± 0.2
Cable weight(kg/km)		20 ± 2

3.2.2 Mechanical Performance of Cable 

Tensile performance(N)	Crush(N/100mm)
1000	1000

3.2.3 Color Code of the Fiber

Each fiber can be identifiable throughout the length of the cable  in accordance with the following color sequence.

Fiber color code	1
	nature

 

 

3.2.4 Strippability and access to the fiber

The 900μm tight buffered fiber coating must be removed minimum 2cm in a single operation , without altering the primary coating of the fiber.

3.2.5 INNER LSZH SHEATH CHARACTERISTICS

Item	REQUIREMENTS	VALUES	TESTING METHOD
1.	Resit. Tensile min. (the extruded material) -unaged -aged	10 MPa 7.5MPa	ASTM D-638-84
2.	Elongation at break min. (the extruded material) -unaged -aged	150% 75%	ASTM D-638-84
3	The amount of halogen acid gas Emission of corrosive gases	<0.5% PH＞4.3 Conductivity: ≤10μS/mm	IEC 60754-1 and 60754-2
4	Oxygen Index	≧26%	ASTM D2863-74
5.	Smoke density	≥60%	IEC 61034
6.	Propagation resistance of Cable fire	a)The distance between the lower edge of the top support and the onset of charring is greater than 50 mm. b)The distance from the lower edge of the top support to the lower onset of charring is less than 540mm.	IEC 60332-1
7.	Absorption of water	90 C, 24hs, Max. 15mg/cm2	IEC 60811-1-3
8	Density	1.5 ±0.1 g/cm3	ASTM D792
9	Contraction of sheath	100 ° C ,4h,   <5%	See 3.3.7
10	Dielectric strength of the sheath During extrusion of the sheath Cable terminated	10 kv / 50Hz for 0.1 sec 3 kV / 50 Hz for 2 minutes 6 kVdc for 2 minutes
11	Thermal shock	EN 6081 1-3-1 150±2 ºC, 1 hour	No crack
12	Bending at low temperature	EN 60811-1-4 -15±2℃	No crack
13	Elongation without break	EN 60811-1-4 IEC 60811-1-1 -15℃±2℃	Min Elongation 20%
14	Pressure at high temperatures	EN 60811-3-1 8.2 80 ±2ºC, 4 hours	Maximum mean depth of footprint: 50%
15	Impact under low temperatures	EN 60811-1-4 -25 ± 2  ºC	No crack
16	Oil resistance（IRM 902）: · Tensile strength · Breakage stretching	IEC 60811-2-1    70 ± 2  ºC, 4 hours   IEC 60811-1-1	· Tensile strength Maximum variation: ± 30% · Breakage stretching Minimum average value: 100% Maximum variation: ± 30%

 

3.2.6 OUTER SHEATH CHARACTERISTICS

The sheath will be medium density polyethylene and black color. The polyethylene must meet the requirements for the type ASTM D1248, type III or IV, Class C, Category 4 or 5 Grade J4, also containing a suitable antioxidant, as well as the addition of UV stabilizers .

 

 

 

 

 

The carbon black content will be 2.6 +/- 0.25 weight% according to ASTM D1603 with an average size of 20 nm according to ASTM D1765 N110.

The absorption coefficient measured by ASTM D3349 light is at least 400 measured at a wavelength of 375 nm.

 

3.2.7 Characteristics of aramid yarns

Parameter	Acceptance Criteria
Specific gravity	1,44 gr/cm3
Elasticity module	³ 10 5 MPa
Breakage load	³ 2300 Mpa
Breakage stretching	< 3%

 

3.1  Mechanical, Electrical and Environmental Test Characteristics

The finished cables can be subjected to the following mechanical, electrical and environmental conditions.

Item	Test Method	Requirements
3.3.1Tensile performance	IEC 60794-1-2-E1 Load: According to 3.2.3 Cable length under tension: about 100m. Intermediate load steps shall be maintained for a minimum of 15 minutes (minimum 3 steps), while the maximum load condition (1000N) must be applied by an hour Velocity of transfer device: either 100 mm/min Diameter of chuck drums and transfer devices:20 times cable diameter	Elongation of the cable must be less than or equal to 0.6%, and reversible Elongation of the fibres must be less than or equal to 0.33%, and reversible The maximum residual fiber elongation must not exceed 0.03% Variation of attenuation must be less or equal to 0.1 dB.
3.2.2 Tensile performance For long term(with anchor clamps)	The purpose of this test is to verify the stretch fiber optic cable under natural conditions or EDS (Every Day Stress). To this was used on the traction machine two holding jaws compression, whose radius of curvature is greater than 3cm. a tractive force of 500N (1/2 CMO) applied for 24 hours will be exercised.	At the end of the same cable must not have been stretched more than 2% and the attenuation should not have increased more than 0.1 dB.
3.3.2  Crush	IEC 60794-1-2-E3 Load: According to 3.2.3 Duration: 15 min. 3 poionts.	Variation of the attenuation must ≤0.1 dB throughout the test. No change in attenuation after test. No damage to the cable elements.
3.3.3 Impact	IEC 60794-1-2-E4 Striking surface Radius: 12.5mm Impact energy: 5N.m Number of impacts: each 5 times at 5 point, total 25 times, each separated at least 10 cm Height:1m	Variation of the attenuation must ≤0.1 dB throughout the test. No damage to the cable elements.
3.3.4 Torsion	IEC 60794-1-2-E7 Cycles:10 Distance between fixed and ration clamp:1m Turns: ±180° Load: 25N	Variation of the attenuation must ≤0.1 dB throughout the test. No damage to the cable elements.
3.3.5 Re-bending	IEC 60794-1-2-E6 Bending radius: 20 times cable diameter Cycles: 100 (90 °) Load: 55N Duration of cycle: Approximately 2s.	Variation of the attenuation must ≤0.1 dB throughout the test. No damage to the cable elements under 10X magnification..
3.3.6 Bend at low temperature	IEC 60794-1-2-E11A Mandrel diameter:60mm Turns:4 Cycles:3 The sample is conditioned for a period of 4 hours at the test temperature -15 ° C, the measurement of attenuation will be held at the extremes of temperature	Variation of the attenuation must ≤0.1 dB throughout the test. No damage to the cable sheath under 10X magnification.
3.3.7 Contraction of sheath	EIA-RS-455-86 The sample under test will consist of two sections cover of 5 cm long and 0.6 cm wide each, removed a section of cable. They will be subjected to a temperature of 110 ° C ± 2 ° C(HDPE); 100 ° C ± 2 ° C(LSZH) for 4 hours.	The maximum contraction of the outer cable jacket should be less than 5% once cooled
3.3.8 Temperature cycling	IEC 60794-1-2-F1 Length: not less than 500m The sample coil is preconditioned a spool and at room temperature for 24 hours. Temperature range TA~TB: -15℃ to +65℃ Cycles:2 Dwell time t1 : 24 hours	The change of attenuation to extreme operating temperatures with respect to the extent preconditioning, shall not exceed 0.1 dB / km
3.3.9 Thermal ageing	IEC 60794-1-2-F1 Temperature: 85±2℃ Duration: 120 hours	The variation in attenuation coefficient shall be less than 0.2dB/km. No change in attenuation after test.
3.3.10 Color persistence	This test is to verify the degree of persistence of coloration applied for identification and fiber cover	the cable 500 m subjected to the test cycles and thermal aging, a sample of 1m length is extracted. color quality used in the identification of the cover, coating the fibers and buffer tubes will be discussed, these must not be discernable gradations of color register, for the unaged sample of the same cable.
3.3.11 Water penetration	IEC 60794-1-F5B Sample length: 3m Water column: 1m Duration: 24 hours	No water leakage.
3.3.12 Abrasion resistance of sheath markings	IEC 60794-1-2 E2B Method 2. Load: 4N Number of cycles: 100	The marking shall be legible after test.
3.3.13 Resistance to cracking under environmental stress	For HDPE : ASTM D 1693-70/80 Condition B As a reagent solution Igepal CO- 630 will be used at 10% by volume, to which the sample is exposed for a period of not less than 500 hours. For LSZH: IEC 60811-4-1 test method, CO-630(canbe replaced by TX-10)will be used at 10% by volume , 96h.	At the end of the test, there shall be no evidence of cracks

Remark: “No attenuation changes” is considered as the attenuation changes ≤ 0.05 dB.

1.  Cable Sheath Marking

Unless otherwise specified, the cable sheath marking shall be in accordance with follows:

• Color: White
• Contents: Telecom¨HUAWEI ¨ yyyy¨ ITU¨G.657A2¨ 30701196 ¨ xxxxx m¨ DD/MM/YYYY ¨ Distribution¨ cable

_ Telecom

_¨ means one blank space

_ HUAWEI

_ Number NP: yyyy

_ Fiber type: ITU G.657A2

_Catalogo of Telecom: 30701196

_ Length marking: xxxxxm( example: 12345m )

_Year of production: DD/MM/YYYY ( example: 12/05/2016 )

_Desprition: Distribution cable

• Interval: 1m

Marking height: 2.5±0.3mm