Specification of Cables

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Technical Specification

For

Single Mode Optical Fiber Cable

for Aerial or Duct Application

Metallic or Non-Metallic Type

(SM 2-48 Fibers)

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1. GENERAL

This specification covers the constructional, optical and mechanical properties of single mode

optical fiber cables.

2. OPTICAL FIBER CHARACTERISTICES

Optical Fiber Characteristics shall be as bellow (The optical properties listed in the following

table are according to ITU-T recommendation G.652

2.1 CONSTRUCTIONS:

SINGLE-MODE OPTICAL FIBER

FIBER REGION

PROPERTY TEST PROCEDURE SPECIFICATION

Core(Glass) Diameter

Effective Area

Non-Circularity

Core/Cladding Offset

EIA/TIA-455-176-A

EIA/TIA-455-132-A

ANSI/TIA-455-176-A

ANSI/TIA-455-176-A

Typ8.3m, Shall be

mentioned in the SOC 2

72 m 6%

0.5m

Cladding

(Glass)

Diameter

Non-Circularity

Concentricity Error

EIA/TIA-455-176-A

EIA-TIA- 455-176-A

EIA-TIA- 455-176-A

125 0.7 m

< 0.7%

0.5 m

Coating Material

Diameter (Uncolored)

Non-Circularity Concentricity-Error coating/Cladding

Offset

IEC 60793-1-21(2001-8)

IEC 60793-1-21(2001-8) IEC 60793-1-21(2001-8) EIA-TIA- 455-176-A

UV-Acrylate

2455m

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2.2 Optical Characteristics:

SINGLE-MODE OPTICAL FIBER

PROPERTY TEST

PROCEDURE

SPECIFICATION

Maximum Individual 1310 nm

Fiber Attenuation at: 1550 nm

ANSI/TIA-455-78-B

0.35dB/Km 0.25dB/Km

Temperature Variation of attenuation EIA/TIA-455-52 0.05dB/Km

Point Discontinuities at 1310/1550nm ANSI/TIA-455-78-B 0.10dB

Water Peak Attenuation at 13833nm TIA-455-78-B 0.31dB/Km

Attenuation Change 1285 to 1330nm vs .Wavelength

1525 to 1575nm

TIA-455-78-B

0.05dB/Km 0.05dB/Km

Attenuation Change 100wraps/50mm dia

vs .Bending at 1550nm 1wrap/32mm dia

EIA/TIA-455-62-B

0.1dB 0.5dB

Zero Dispersion Wavelength EIA/TIA-455-175-B 1300-1324nm

1310nm

Maximum Dispersion at : 1550nm

EIA/TIA-455-175-B 3.2ps/nm.Km 18.0ps/nm.Km

Zero Dispersion Slope EIA/TIA-455-175-B 2 0.092ps/nm .Km

1310nm

Nominal Mode Field Diametr: 1550nm

IEC 60793-1-45

9.20.4m Typ 10.40.8m

Cabled Fiber Cut off Wavelength (cc) IEC 60793-1-44 < 1260nm

PMDQ (M=20 cables,Q=0.01%) EIA/TIA-455-113

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2.3 Mechanical & Environmental Characteristics

SINGLE-MODE OPTICAL FIBER PROPERTY TEST PROCEDURE SPECIFICATION

Proof Test Stress EIA/TIA-455-31-C Min 0.69Gpa Dynamic Fatigue Parameter(Nd) EIA/TIA-455-28-C, 76 20

Static Fatigue (Ns)@85 c,85% RH EIA/TIA-455-28-C, 76 20

Dynamic Tensile Strength GP Aged EIA/TIA-455-28-C, 76 3

3.8 unaged

Cleavability 100% Telcordia

GR-20-Core

2.0

90% 1.0

Fusibility @1310

@1550

Per link Telcordia

GR-20-Core

0.05dB

Per splice 0.07 dB for %10 of

splicing

0.05 dB for %90 of

splicing

Coating Strip Force N TIA-455-178-B 1.3 Min , 8.9 Max

Induced

Attenuation@1310-

1550 nm dB/km

Temperature Cycling

Performance (-60c

to85c)

EIA/TIA-455-3-A 0.05

Water Immersion,

(23c/70c)at1550

and1625nm

EIA/TIA-455-74-A 0.05

Filling compound

immersion,(23c/70c

30days) at 1550 and

1625nm(mineral oil)

EIA/TIA-455-74-A 0.05

Retention of coating

color

Nodiscernible change in color when aged for 30

days at 95c and 95%humitdity and for 20 days in

dry heat 125c

Pull out force

(Adhsion of coating

to glass surface)

EIA/TIA-455-28-C, 76 Min: 6.2 N

Max: 22 N

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3 Cable Construction

3.1 Figure 8 Self Supporting Aerial Cable

3.2 Armored cable

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3.3 Unarmored cable

3.4 Drop Cable

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4 Fiber Identification: 4.1 Fibers shall be identified by the following colors

Fiber No. 1 2 3 4 5 6

Color Code Blue Orange Green Brown Gray White

Fiber No 7 8 9 10 11 12

Color Code Red Black Yellow Violet Pink Aqua

4.2 Color Code for Loose Tube (LT) and Filler Rod (FR)

Fiber number

Element no.

1 2 3 4 5 6

24 Blue (LT) Orange(LT) White(FR) White(FR) White(FR) White(FR)

48 Blue(LT) Orange(LT) Green(LT) Brown(LT) White(FR) White(FR)

5 Performance of Optical Cable

5.1 Cable bending radius: 10 x cable diameter (static)

20 x cable diameter (dynamic

5.2 Application temperature range

Operating temperature range :-20 C to +70 C

Storage / Transport temperature range :-20 C to +70 C

Installation temperature range :-20 C to +50 C

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6 Packing and Marking

6.1 Packing

6.1.1 Each single length of cable shall be wound on a pure wooden drum.

6.1.2 Standard drum length is 2000m 1%, or it can be delivered according to custo

mer requirement but not longer than 6000m with a tolerance.

6.1.3 Covered by plastic buffer sheet.

6.1.4 Sealed by strong wooden battens 6.1.5 At least 1m of inner end of cable should be reserved for testing.

6.2 Drum marking

- Custmers name & logo;

- Manufacturing year and month;

- Roll-direction arrow;

- Cable outer end position indicating arrow;

- The word OPTICAL FIBER CABLE;

- Cable type and size;

- Drum number;

- Drum length;

- Gross / net weight;

-

Caution plate indicating the correct method for loading, unloading and convey the cable;Other

customer information such as contract no., project no., and delivery destination. (if needed)

6.3 Cable quality certificate documents

- Quality certificate;

- Test report.

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Fiber Optic Termination System

Fiber Optic Distribution System 1. OPTICAL DISTRIBUTION FRAME,

2. HIGH DENSITY FIBER DISTRIBUTION RACK

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3. FIBER OPTIC SPLICE CLOSURE,

4. FIBER OPTIC SPLICE CLOSURE - Locking & Connecting

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4.1 FIBER OPTIC SPLICE CLOSURE Gaskets

4.2 FIBER OPTIC SPLICE CLOSURE Feeder & Drop Cabling

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4.3 FIBER OPTIC SPLICE CLOSURE Splitters for Distribution

5.1 FIBER OPTIC SPLICE CLOSURE,

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5.2 FIBER OPTIC SPLICE CLOSURE,

6.1 FIBER DISTRIBUTION HUB,

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6.2 FIBER DISTRIBUTION HUB,

7.1 OPTICAL TERMINATION BOX

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7.2 OPTICAL TERMINATION BOX Specification

7.3 OPTICAL TERMINATION BOX Specification

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7.4 OPTICAL TERMINATION BOX for Outdoor Drop Solution

8.1 OUTLET BOX

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Fiberoptic Cable Testing Methods

Quality Assurance Test

1. Tensile performance

1.1. Object

This measuring method applies to optical fiber cables, which are tested at a particular tensile strength in order to examine the behavior of the attenuation and the fiber elongation strain as a function of the load on a cable, which may occur during installation and/or operation.

1.2. Sample

The cable length under test is 150 meters. Additional cable length is needed to connect the fibers to be tested.

1.3. Apparatus

The apparatus consists of: An attenuation measuring apparatus, typically an OTDR. A fiber elongation strain measuring apparatus based on dispersion testing equipment. A specially designed tensile test machine capable of tensioning 150 meters of optical cable in

six legs of 25 meters each. The machine is equipped with a motor for controlled tensioning and a load cell for measuring the actual tension applied on the cable. Figure 1 shows a typical machine.

Figure 1: Typical Tensile Load Machine

1.4. Procedure

The cable is wound in the machine over appropriately sized sheaves. The cable ends extend to reach the measuring instruments. A pre-determined number of fibers within the cable are concatenated by fusion splicing. Typically, two sets of fibers are used, one will serve to measure attenuation change and the other serves for elongation monitoring. After all initial measurements and calibration are carried out, the cable is pulled at a specified rate until a pre-determined tension is applied. The cable is laid to rest under tension as per detail specifications, and then the attenuation and fiber length are measured. This process may involve several tensile levels in order to characterize the entire tensile behavior of the cable, or be carried out only at the defined maximum allowed tension level.

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1.5. Pass/Fail criteria

Under load, the fiber attenuation is not increased more than a predetermined value, typically 0.05 dB over the fiber length measured.

Under load, the fiber does elongate by more than a pre-determined value over its initial length. The allowed elongation under installation load is typically 0.25%.

2. Crush (Compression)

2.1. Object

The purpose of this test is to determine the ability of an optical fiber cable to withstand compression.

2.2. Sample

The sample is a representative cable length sufficient to carry out the specified test.

2.3. Apparatus

The apparatus allows a sample of cable to be crushed between a flat steel base plate and a movable 100 mm long steel plate. The edges of the movable plate are rounded with a radius of about 5 mm. A typical apparatus is shown in Figure 2.

Figure 2: Typical Compressive Load Machine

2.4. Procedure

The cable sample is mounted between the plates so that lateral movement is prevented, and a pre-determined force is applied gradually. The maximum applied force is typically maintained for 10 minutes. Two types of measurements may be defined: The fiber attenuation is measured at the end of the 10-minute period while the cable is still

under pressure. The fiber attenuation is measured 5 minutes after pressure release. This requirement is

usually carried out at higher compressive loads than the previously described measurement.

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The attenuation must not change by more than a pre-determined value, typically 0.05 dB. In all cases, the cable elements should not fracture or crack. Signs of compression are not

considered as damage to the cable elements.

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3. Impact

3.1. Object

The purpose of this test is to determine the ability of an optical fiber cable to withstand impact.

3.2. Sample


3.3. Apparatus

The apparatus allows a hammer with a 25 mm rounded edge to drop vertically on a cable sample fixed on a flat steel plate. The apparatus may allow a single or multiple repeated impacts to be imparted on the cable sample. The energy of the impact is determined by the drop height and by the weight of the hammer. A typical impact test set-up is shown in Figure 3.

Figure 3: Typical Impact Testing Machine

3.4. Procedure

Two procedures are commonly used: A repeated impact test whereby the hammer drops on the same location in the cable sample

25 times. The hammer is allowed to drop on 3 different locations in the cable, typically separated by

50 cm from each other. The number of impacts in each location is limited (1 to 3).


The fiber attenuation does not increase by more than a predetermined value, typically 0.05 dB.

In some case, the cable passes the test if there are no fiber breaks. This requirement is usually applied when very high impact energy is used.

There are no breaks or cracks in the cable elements. Signs of the impact are considered normal.

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4. Repeated bending (Cyclic Flexing)

4.1. Object

The purpose of this test is to determine the ability of an optical fiber cable to withstand repeated bending.

4.2. Sample


4.3. Apparatus

The apparatus allows a cable sample to be bent backwards and forwards through at an angle of

180, the two extreme positions making an angle of 90 on both sides of the vertical, while the

sample is subjected to a tensile load. A typical apparatus is shown in Figure 4.

The bending arm is designed to permit holding the cable securely during the entire test, without

crushing the optical fibers or inducing optical loss. The bending radius is controlled by

replaceable cushioning reels chosen to match the cable bending radius.

The apparatus is capable of cycling at a rate of 30 cycles per minute.

Figure 4: Typical Cyclic Flexing Machine 4.4. Procedure

A cable sample is secured to the bending arm while it is in an upright position. A predetermined

weight is attached to the bottom of the cable sample. The motor is turned on and the arm

oscillates between the two extreme positions flexing the cable. The number of flexing cycles

depends on the cable design.


The fiber attenuation does not increase by more than a predetermined value, typically 0.05 dB.

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5. Torsion

5.1. Object

This test method is intended to establish the ability of a fiber optic cable to withstand mechanical twisting.

5.2. Sample

The length of the specimen under torsion should be sufficient to permit the appropriate clamping and twisting, and long enough to sustain the applied torsion. A typical value for small cables is 1 m, whereas larger cable samples are usually defined in terms of the cable diameter. A common length value is 125 times the cable diameter. Armored cables may require a longer cable sample or a smaller number of torsion cycles. The actual sample length is longer than the part under torsion to allow connecting the fibers to be tested.

5.3. Apparatus

The twisting apparatus consists of two cable gripping devices or clamps, one fixed and one that can rotate. The distance between the clamps defines the cable length under twist and is adjustable. The rotating clamp is connected to suitable turning equipment. A typical apparatus is illustrated in Figure 5. The clamps are designed to prevent crushing force on the cable and to allow the cable end to exit from both sides to allow optical measurements.

Figure 5: Typical Torsion Testing Machine

5.4. Procedure

The cable is installed in the test fixture. A pre-determined weight is fixed to one of the clamps to provide tension to the cable sample. The fiber ends are connected to suitable attenuation or optical power measurement equipment

. The rotating clamp is then rotated as follows: 180 in one direction back to the starting position 180 in the opposite direction Back to the starting position.

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These four steps constitute a cycle. The cable sample is subjected to a predetermined number of such cycles, typically 10.


The attenuation must not change by more than a pre-determined value, typically 0.05 dB. The cable should not show any indications of mechanical failure, such as jacket cracks,

armor opening etc.

6. Bend Method 6

6.1 Object

The purpose of this test is to determine the ability of an optical fiber cable to withstand bending

around a test mandrel.

6.2 Sample


6.3 Apparatus

The apparatus is a simple mandrel of the specified diameter on which a cable sample can be wrapped tangentially in a close helix. A simple apparatus is shown in Figure 6.

Figure 6: A mandrel and bent cable sample

6.4 Procedure

The sample is wrapped in a close helix around the mandrel at a uniform rate. Sufficient tension is applied to ensure that the sample contours the mandrel. The sample is then unwrapped. A cycle consists of one wrapping and one unwrapping. This test is often performed at low temperature to verify the cable ability to be installed at such temperatures without being damaged.

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6.5 Pass/Fail criteria

The attenuation must not change by more than a pre-determined value, typically 0.05 dB. The cable should not show any indications of mechanical failure, such as jacket cracks.

7. Temperature Cycling Method 7

7.1 Object

This measuring method is designed to determine the stability of the fiber attenuation in cables submitted to extreme temperature conditions.

7.2 Sample

The sample is a standard cable of a length sufficient to make accurate measurement of the attenuation change. Single mode fiber cables should be at least 500 meters long, and preferably 1000 m long. Multi-mode fiber cables may be shorter. A sufficient number of fibers distributed over the cable structure are tested, at least one fiber per tube in Loose Tube cables. It is important to test a different fiber in each tube to receive a statistically meaningful estimate of the cable performance under different temperature conditions. In order to gain reproducible values, the cable sample is placed in the climate chamber as a loose coil or on a reel. In most cases the tested fibers (from different tubes) are fusion spliced in series and measured together using OTDR. The fusion splices are located outside the climate chamber.

7.3 Apparatus

A climate chamber is used of a suitable size to accommodate the sample. The chamber temperature can be controlled to within 3 C of the specified testing temperature. Such a chamber is illustrated in Figure 7. The fiber attenuation may be monitored using a stabilized light source / power meter combination or, preferably, an OTDR.

Figure 7: A Climate Chamber and tested cables

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7.4 Procedure

A typical temperature cycle is depicted in Figure 8.

A reference value for attenuation is determined on the cable sample already installed in the

climate chamber and ready for the temperature cycling.

The temperature in the chamber is then lowered to the appropriate low temperature TA at

the appropriate rate of cooling.

After temperature stability in the chamber has been reached, the sample is exposed to the

low temperature conditions for the appropriate period t1.

The temperature in the chamber is then raised to the appropriate high temperature TB at the

appropriate rate of heating.

After temperature stability in the chamber has been reached, the sample is exposed to the

high temperature conditions for the appropriate period t1.

The temperature in the chamber is lowered to ambient temperature at the appropriate rate

of cooling.

This procedure constitutes one cycle. Typically, cables are exposed to 2 such cycles.

Figure 8: A Typical Temperature Cycle

7.5 Pass / Fail Criteria

The attenuation of the fibers in the cable should not increase by more than a pre-determined value.

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8. Water penetration Method 8

8.1 Object

The purpose of this test is to determine the ability of a cable to block water migration along a specified length.

8.2 Sample

A 1 to 3 meter long representative cable sample is used. A watertight seal is applied to one end

of the sample to allow a 1 m height of water to be applied.

8.3 Apparatus

The apparatus consists of a vertical pipe containing water at a height of 1 meter. The pipe is

connected at its bottom to a flexible tube that allows watertight connection to the cable under

test. See Figure 9 for a basic representation of such a set-up. The cable sample is laid flat and a

suitable arrangement is made in order to determine if water leaks from its exposed end.

Figure 9: Water penetration test set-up

8.4 Procedure

The sample is supported horizontally and a 1 m height of water is applied for 24 h. A water-soluble fluorescent dye or other suitable coloring agent may be used to aid in the detection of water seepage.

8.5 Pass / Fail Criteria

No water leaks are detected from the exposed cable end.

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Fiber Optic Cable Acceptance Test

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General

The following three acceptance tests are required.

I. Cable Reel Acceptance Test: conducted upon receipt of cable from a shipper. II. Cable Installation Acceptance Test: conducted after cable burial.

III. Final Acceptance Test: conducted after all splices and connectors are installed.

All tests must be preformed at 1310 nm and 1550 nm. The differences in operating characteristics at these two wavelengths indicate whether the fiber has any particular anomalies. These tests are designed to find fiber anomalies.

1. Acceptance Test Documentation

Documentation of all tests is a high priority. The data accumulated from these tests will be an invaluable resource in the future. Before the project is completed, Therefore, awell-organized documentation system is a necessity. The recommended acceptance testforms are attached and are available in MS Excel format. The recommended organization of the documentation is as follows.

1. A three ring binder should be created to contain all Reel Acceptance tests, and should be organized by Reel ID.

2. A three ring binder should be created to contain all Installation Acceptance tests, and should be organized by Cable ID.

3. A three ring binder should be created to contain all Final Acceptance tests, and should be organized by Antenna Pad ID.

4. The binders should be kept and maintained in the Fiber Optic Field

2 OTDR Trace File Names

Every OTDR trace associated with an acceptance test must be saved on computer disk and archived. These computer files are useful for future reference, and could also become a legal document. This means a very large number of files will accumulate; we will have more than 9000 files. Therefore, it is important that we have a file system that is well organized and easy to use. The following organization is recommended.

1. All acceptance test sub-folders should be kept in a folder named Cable_Acceptance.

2. Reel acceptance test OTDR files should be kept in a sub-folder named after the Reel ID.

3. Installation acceptance test OTDR files should be kept in a sub-folder named

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after the Cable ID. 4. Final acceptance test OTDR files, and future troubleshooting test files, should

be kept in a sub-folder named after the antenna pad that the fiber serves. 5. Files names should have a logical and consistent format such as follows.

Date code Test location

Tube color, Fiber color

XXX-XXXX-XXXX-XXX-mmddyy

RAT - Reel ID = Reel Test IAT - Cable ID = Installation Test FAT - Pad ID = Final Test

6. The color code for fiber and tubes is shown below. A yellow fiber in an orange tube would have the color code ORYW

1. blue = BU 2. orange = OR 3. green = GR 4. brown = BN 5. slate = SL 6. white = WT 7. red = RD 8. black = BK 9. yellow = YW 10. violet = VL 11. rose = RS 12. aqua = AQ

7. Test Location should be a location code such as ASP (Array Splice Panel), DW7 (Manhole at DW7), etc.

8. All files and folders should be backed up onto CD daily, and should be kept and maintained in the Fiber Optic Field

3 Cable Reel Acceptance Test

The Cable Reel Acceptance Test (Reel Test) is a preliminary test to be preformed When cable from the shipper. This test should be performed as soon as

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possible after receipt of the shipment. The Reel Test only requires one end of the cable (normally the inside end), and does not require connectors on the fiber. This test is intended to verify that the fiber is received from the shipper in sound condition and without manufacturing defects. Any anomalies must be reported immediately to the shipper and manufacturer. Cable should not be used until it passes this test.

3.1 Tools Required

1. Knife 2. Armor Stripper 3. Kevlar Shears 4. Alcohol and wipes 5. Fiber Stripper 6. Fiber Cleaver 7. Bare Fiber Adapter, glass adapter, or mechanical splice 8. OTDR 9. Floppy Disk 10. Heat Shrink and Cable Ties 11. Reel Acceptance Test data sheet

3.2 Procedure

1. Record the following information. a. Cable ID b. Cable type c. Number of fibers d. Cable length as shown on reel e. Maximum specified loss at 1550 nm f. Maximum specified loss at 1310 nm g. Date h. Test Crew i. OTDR model and s/n

2. Inspect the cable and record any visible signs of defects. 3. Strip at least two feet of the cable end. Clean and strip the fibers. 4. Use a bare fiber adapter and an OTDR to take the following measurements from

one end of the cable. a. Total loss at 1550 nm b. Attenuation per kilometer at 1550 nm c. Total loss at 1310 nm d. Attenuation per kilometer at 1310 nm e. Total length as indicated by ODTR f. Note any anomalies (rescale for clarity and record)

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Date ________ Technician(s) ___________________________ File Name __________

5. Print and record the OTDR traces on disk. Indicate direction of measurement, and loose tube and fiber color.

6. Note differences between the 1550nm trace and the 1310nm trace.

a. Slightly greater attenuation over a length of fiber at the shorter wavelength is normal. b. Uncut cable should have no reflections or attenuation steps. c. Larger attenuation steps at the longer wavelength may indicate macrobending. d. Attenuation steps or gains at both wavelengths indicate spliced, broken or damaged fiber. e. Reflections indicate broken fiber.

7. Compare the test results to the manufacturers specifications. 8. Remove bare fiber adapter and cut off excess fiber from the cable end. 9. Install heat shrink or other protective covering to the cable end to prevent the

entry of moisture or other contaminants.

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3.3 Fiber Optic Reel Acceptance Test (Report)

Reel ID Cable ID(s) PO number Cable length (m) Cable type/fiber count Cable end tested Fiber A (max) at 1550 nm (dB/km) Cable foot marking Fiber A (max) at 1310 nm (dB/km) OTDR model Fiber Rayleigh coefficient OTDR s/n Fiber index of refraction OTDR pulse width Visible cable defects

Color

Tube/Fiber

As tested at 1310 nm

A (dB) L (m) A (dB/km)


A (dB) L (m) A (dB/km)

1

2

3

4

5

6

7

8

9

10

11

12

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4 Cable Installation Acceptance Test The Cable Installation Acceptance Test (Installation Test) is similar to the Cable Reel Acceptance Test except the Installation Test is conducted from both ends of the fiber. The Installation Test is performed immediately after the cable is buried, and before splices or connectors are added.

4.1 Tools Required

1. Knife 2. Armor Stripper 3. Kevlar Shears 4. Alcohol and wipes 5. Fiber Stripper 6. Fiber Cleaver 7. Bare Fiber Adapter, glass adapter, or mechanical splice 8. OTDR 9. Floppy Disk 10. Heat Shrink and Cable Ties 11. Installation Acceptance Test data sheet

4.2 Procedure

1. Record the following information. a. Cable ID b. Cable type c. Number of fibers d. Cable length as shown on reel e. Maximum specified loss at 1550 nm f. Maximum specified loss at 1310 nm g. Date

h. Test Crew i. OTDR model and s/n

2. Inspect the cable and record any visible signs of defects. 3. Strip at least two feet of the cable end. Clean and strip the fibers. 4. Use a bare fiber adapter and an OTDR to take the following measurements from

one end of the cable. a. Total loss at 1550 nm b. Attenuation per kilometer at 1550 nm c. Total loss at 1310 nm d. Attenuation per kilometer at 1310 nm e. Total length as indicated by ODTR

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f. Note any anomalies (rescale for clarity and record) 5. Print and record the OTDR traces on disk. Indicate direction of measurement, and

record tube and fiber color. 6. Note differences between the 1550nm trace and the 1310nm trace.

a. Slightly greater attenuation over a length of fiber at the shorter wavelength is normal.

b. Uncut cable should have no reflections or attenuation steps. c. Larger attenuation steps at the longer wavelength may indicate macrobending. d. Attenuation steps or gains at both wavelengths indicate spliced, broken or

damaged fiber. e. Reflections indicate broken fiber.

7. Compare the test results to the manufacturers specifications. 8. Remove bare fiber adapter and cut off excess fiber from the cable end. 9. Install heat shrink or other protective covering to the cable end to prevent the

entry of moisture or other contaminants. 10. Repeat steps 2 to 9 from the opposite end of the cable. 11. Note differences in measurements taken from opposite directions.

a. Traces should be similar in both directions. b. Reflections in one direction and attenuation steps in the other direction indicate a poor splice or fiber mismatch

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Date ________ Technician(s) ___________________________ File Name __________

4.3 Fiber Optic Installation Acceptance Test(Report)

Reel ID Cable ID(s) PO number Cable length (m) Cable type/fiber count Cable end tested Fiber A (max) at 1550 nm (dB/km) Cable foot marking Fiber A (max) at 1310 nm (dB/km) OTDR model Fiber Rayleigh coefficient OTDR s/n Fiber index of refraction OTDR pulse width Visible cable defects

Color Tube/Fiber

As tested at 1310 nm A (dB) L (m) A (dB/km)

As tested at 1550 nm A (dB) L (m) A (dB/km)

1

2

3

4

5

6

7

8

9

10

11

12

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5 Final Acceptance Test

The Final Acceptance Test (Final Test) is conducted from both ends of the fiber after all splices have been installed. It is an end-to-end test, and the last test to be done before the fiber is used for transmission. This test can also be used for troubleshooting purposes whenever the integrity of the fiber is in question. Like the Installation Test, the Final Test is conducted from both ends of the fiber, but also includes return loss measurements. This test is conducted with connectors installed on the ends of the fiber, if possible.

5.1 Tools Required

1. Appropriate patch cords and adapters 2. OTDR 3. Floppy Disk

4. Return Loss Meter

5. Final Acceptance Test data sheet

5.2 Procedure

1. Record the following information. a. Pad ID b. Maximum specified loss at 1550 nm c. Maximum specified loss at 1310 nm d. Date e. Test Crew f. OTDR model and s/n g. RM model and s/n h. PM model and s/n i. Source model and s/n

2. Inspect the fiber and record any visible signs of defects. 3. Use the OTDR to take the following measurements from one end of the fiber.

a. Total loss at 1550 nm b. Attenuation per kilometer at 1550 nm c. Total loss at 1310 nm d. Attenuation per kilometer at 1310 nm e. Total length as indicated by ODTR f. Note any anomalies (rescale for clarity and record)

4. Print and record the OTDR traces on disk. Indicate direction of measurement, and record tube and fiber color.

5. Note differences between the 1550nm trace and the 1310nm trace. a. Slightly greater attenuation over a length of fiber at the shorter wavelength

is normal. b. Uncut cable should have no reflections or attenuation steps

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Date ________ Technician(s) _______Test Location__________ File Name __________

c. Connectors may have no more than 0.3 dB attenuation and low return loss (greater than 65 dB for APC Connectors).

d. Fusion splices may have no more than 0.1 dB attenuation and no return loss.

e. Mechanical splices may have no more than 0.3 dB attenuation and greater than 65 dB return loss.

f. Larger attenuation steps at the longer wavelength may indicate macrobending.

g. Attenuation steps or gains at both wavelengths indicate spliced, broken or damaged fiber.

h. Reflections where no connectors or splices are expected indicate broken fiber.

6. Compare the test results to the manufacturers specifications. 7. Use the RM to measure return loss. Save the measurement in an appropriate

file.

8. Repeat steps 2 to 7 from the opposite end of the cable. 9. Note differences in measurements taken from opposite directions.

a. Traces should be similar in both directions. b. Reflections in one direction and attenuation steps in the other direction

indicate a poor splice or fiber mismatch

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5.3 Fiber Optic Final Acceptance Test (Report)

Pad ID RM model

Fiber Rayleigh coefficient RM s/n

Fiber index of refraction PM model

OTDR model PM s/n

OTDR s/n Source model

OTDR pulse width Source s/n

Visible cable defects

Color

Tube/Fiber

Terminal

Panel/Position


A (dB) L (m) A (dB/km) IL (dB) RL (dB)

1

2

3

4

5

6

7

8

9

10

11

12

Color

Tube/Fiber

Terminal

Panel/Position


A (dB) L (m) A (dB/km) IL (dB) RL (dB)

1

2

3

4

5

6

7

8

9

10

11

12

2015


Specification of Cables

Documents

nm fiber attenuation

nm tia

nm iec

c to85c eiatia

rh eiatia

nm ansitia

nm 1wrap32mm dia eiatia

dispersion wavelength