Fiber Drop Cable

fiber drop cable is mostly single-core, double-core structure, can also be made into four-core structure, cross-section is 8-letter, reinforcement is located in the center of the two circles, metal or non-metallic structure can be used, the fiber is located in the geometric center of the 8-letter. The optical fiber inside the skin cable adopts G.657 small bending radius optical fiber, which can be laid with a bending radius of 20mm, and is suitable for entering the house in the way of piping or laying open wire in the building.

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Description

General

This specification covers the design requirements of structure, mechanical, physical and performance standards for the supply of optical fiber cables. The features described in this document are intended to provide information on the performance of optical cable.

Specifications

2.1 General Specifications

Cable Type	FTTH Outdoor Indoor Drop Cable
Fiber Type	SM G657A1/ SM G657A2
Application	FTTH, LAN, CCTV
Recommended installation methods	Aerial
Environment	Indoor/Outdoor
Temperature Range	-40℃ to 70℃

2.2 Fiber Specifications

Fiber style			Unit	SM G652D	SM G657A1	SM G657A2
condition			nm	1310/1550	1310/1550	1310/1550
attenuation			dB/km	≤0.36/0.23	≤0.35/0.21	≤0.35/0.21
Dispersion		1310nm	Ps/(nm*km)	≤18	≤18	≤18
Dispersion		1550nm	Ps/(nm*km)	≤22	≤22	≤22
Zero dispersion wavelength			nm	1312±10	1312±10	1300-1324
Zero dispersion slope			ps/(nm²×Km)	≤0.091	≤0.090	≤0.092
PMD Maximum Individual Fiber			[ps/√km]	≤0.2	≤0.2	≤0.2
PMD Design Link Value			ps/(nm²×Km)	≤0.08	≤0.08	≤0.08
Fiber cutoff wavelength λc			nm	≧1180,≤1330	≧1180,≤1330	≧1180,≤1330
Cable cutoff wavelength λcc			nm	≤1260	.....	.....
MFD	1310nm		um	9.2±0.4	9.0±0.4	9.8±0.4
MFD	1550nm		um	10.4±0.8	10.1±0.5	9.8±0.5
Step(mean of bidirectional measurement)			dB	≤0.05	≤0.05	≤0.05
Irregularities over fiber length and point discontinuity			dB	≤0.05	≤0.05	≤0.05
Difference backscatter coefficient			dB/km	≤0.03	≤0.03	≤0.03
Attenuation uniformity			dB/km	≤0.01	≤0.01	≤0.01
Cladding diameter			um	125.0±0.1	124.8±0.1	124.8±0.1
Cladding non-circularity			%	≤1.0	≤0.7	≤0.7
Coating diameter			um	242±7	242±7	242±7
Coating/chaffinch concentrically error			um	≤12.0	≤12.0	≤12.0
Coating non circularity			%	≤6.0	≤6.0	≤6.0
Core/cladding concentricity error			um	≤0.6	≤0.5	≤0.5
Curl(radius)			um	≥4	≥4	≥4

2.3 Standard Color Identification of Fiber

No.	1	2	3	4	5	6
Color	blue	Orange	Green	Brown	Slate	White

2.4 Cable Design

Item	Description
Model No	GJYXCH/GJYXFCH
1. Fiber count	1 Core , 2 Core, 4 Core,6core
2. Cable Diameter	2.0*5.0mm
3. Cable Weight	20KGS/18KGS
4. Strength member
-Material	Steel/FRP
-Diameter	0.45mm*2
5.Outer Sheath
-Material	LSZH
6. Sheath marking
-Type of marking	Laser printing
7. Messenger
OD	1.0mm
Material	Steel wire

2.4.1 Strength Member

The strength member is made of steel or FRP. It provides both tensile and anti-buckling strength to the cable.

2.4.2 Outer Jacket

LSZH sheath is extruded over the fiber.

2.4.3 Cable Sheath Marking

Each cable have the following information clearly marked on the outer jacket of cables:

a. Name of manufacturer.

b. Year of manufacturer

c. Type of cable and fiber

d. Length mark (printing on each meter normally)

e. Or as customer’s requirements.

Cable Structure

product-427-153

Cable Performance

Items		Description
Installation Temperature range		-20--+60℃
Operation and transport temperature		-40-+70℃
Min Bending Radius(mm)	Long term	10D
Min Bending Radius(mm)	short term	20D
Allowable Tensile Strength(N)	Long term	300
Allowable Tensile Strength(N)	short term	600
Crush Load (N/100mm)	Long term	1100
Crush Load (N/100mm)	short term	2200

Connection methods of fiber optic cables？

The main methods are permanent connection, emergency connection, and active connection.

1, permanent fiber optic connection

This connection is used to melt and connect the connection points of two optical fibers together by means of electrical discharge.

2, emergency connection

Emergency connection is mainly mechanical and chemical methods, the two optical fibers fixed and bonded together.

3、Activity connection

Activity connection is the use of various fiber optic connection devices (plugs and sockets), site to site or site to fiber optic cable connected to a method.

What is fiber optic cable used for?

Fiber optic cable is a communication line used for optical signal transmission.

Fiber optic cable consists of several parts such as core, reinforcement wire, filler and jacket, in addition to waterproof layer, buffer layer, insulated metal conductor and other components as needed.

Fiber optic cable consists of 3 parts: reinforcement core and core, sheath and outer sheath. Cable core structure has a single-core type and multi-core type two: single-core type has the filling type and tube bundle type two; multi-core type has the band and unit type two. The outer sheath has two kinds of metal armor and non-armor.