Revision No.:00 Date: 08.03.2010 SPECIFICATION OF 192F SM LOOSE TUBE, DRY CORE MINI CABLE PART NO.:D-192/SM/MTY(F)-MFN-O9.1 Checked By: Pavan Maheshwari Process Associate Design & Development Team Approved By: C.S. Gupta Process Associate Manufacturing Team
1. SCOPE APPLICATION This Specification covers the general requirements for Mini fibre optic telecommunication cables used for Micro duct applications. CABLE DESCRIPTION Single mode colour coded fibres, filled with thixotropic jelly colour coded loose tubes, water swellable yarn, SZ stranded in two layers around the dielectric central strength member, rip cord and outer Nylon jacket. 2. OPTICAL FIBRE 1) Manufacturing Process : VAD 2) Fibre Type : Single Mode Matched clad fibre as per ITU-T G652D 3) The optical Geometrical, Mechanical and Environment performance of the optical fibre shall be in accordance with table 1 and 2 below. Table 1. The Optical and Geometrical Performance of Single Mode Fibre CHRACTERISTICS UNITS SPECIFICATION Attenuation db/km 0.38 & Average 0.35 at 1310 nm 0.25 & Average 0.21 at 1550 nm Chromatic Dispersion ps/nm.km 3.2 at 1285 nm 1330 nm 18.0 at 1550 nm Zero Dispersion nm 1302 1322 Wavelength Zero Dispersion Slope ps/nm2.km 0.092 Polarization Mode ps/ km 0.20 Dispersion Cutt-off Wavelength nm 1260 (λcc, 22m of a cabled fibre) Point Discontinuity db 0.10 at 1310 nm & 1550 nm Attenuation at Water db/km 0.34 at 1383 ± 3 nm Peak Attenuation Vs Wavelength Attenuation Vs Bending (60mm x 100 turns) db/km db 0.05 at 1285 nm & 1330 nm (from the 1310 nm value) 0.05 at 1525 nm & 1575 nm (from the 1550 nm value) 0.10 at 1550 nm
Mode Field Diameter µm 9.3 ± 0.5 at 1310 nm 10.5 ± 1.0 at 1550 nm Core Clad Concentricity µm 0.6 Cladding Diameter µm 125 ± 0.7 Cladding Non Circularity % 1.0 Coating Diameter µm 245 ± 10 Fibre Curl m 4 Effective Group Index (Typical) - 1.4670 at 1310 nm 1.4675 at 1550 nm Table 2. The Mechanical and Environment Performance of Single Mode Fibre CHRACTERISTICS UNITS SPECIFICATION Proof Test Kpsi 100 Temperature Cycling db/km 0.05 at1310 nm & 1550 nm (-60 C to +85 C) Temperature Humidity Cycling db/km 0.05 at1310 nm & 1550 nm (-10 C to +85 C, up to 98 % RH) Water Immersion, 23 C db/km 0.05 at1310 nm & 1550 nm Heat Aging, 85 C db/km 0.05 at1310 nm & 1550 nm 3. CABLE CONSTRUCTION The construction of the cable should be in accordance with table 3. below. Table 3. Construction of the Cable ITEMS DESCRIPTION Number of Fibres 192 Type of Fibre Single Mode (ITU T G652D) No. of Fibres per Tube 12 Loose Buffer Tube Material PBT (Polybutylene Terephthalate) Loose Buffer Tube Diameter Nom. 1.5 mm Filling Compound in Loose Buffer Thixotropic Jelly Compound Tube Water Blocking Material Water Swellable Yarn around the CSM (To prevent the ingress of water) Central Strength Member FRP (Fibre Reinforced Plastic) Rip Cord Two rip cord (To provide easy cable end preparation) Outer Jacket Material Nylon-12 Outer Jacket Thickness 0.4 mm
4. FIBRE AND LOOSE BUFFER TUBE IDENTIFICATION The colour code of the loose buffer tubes and the individual fibres within the loose buffer tube shall be in accordance with Table 4 and 5 below. Table 4. The colour code of the Individual fibres No. of Fibres Colour of Fibre No. of Fibres Colour of Fibre 1 Blue 7 Red 2 Orange 8 Black 3 Green 9 Yellow 4 Brown 10 Violet 5 Grey 11 Pink 6 White 12 Turquoise Table 5. The colour code of the Loose Buffer Tubes No. of Loose Buffer Tubes Colour of Buffer Tube (LAYER-1) No. of Loose Buffer Tubes 1 Blue 1 Blue 2 Orange 2 Orange 3 Green 3 Green 4 Brown 4 Brown 5 Grey 5 Grey 6 White 6 White 7 Red 8 Black 9 Yellow 10 Violet 11 Filler-1 12 Filler-2 5. PHYSICAL / MECHANICAL / ENVIRONMENTAL PERFORMANCE AND TESTS Colour of Buffer Tube (LAYER-2) The Mechanical and Environmental performance of the cable shall be in accordance with Table 6. Unless otherwise specified, all attenuation measurements required in this section shall be performed at 1550 nm. Table 6. The Mechanical and Environmental Performance of the cable TEST Tensile Loading and Bending Test TEST METHOD AND ACCEPTANCE CRITERIA # Test Method :TIA/EIA-455-33A - Mandrel Diameter: 30 D (D= Cable Diameter) - Short term tensile load: 1000 N for 1 hour - Long term tensile load: 500 N for 10 minutes
Compressive Loading Resistance Test Cyclic Flexing Test Cable Twist Test Temperature Cycling Test - Fibre Strain: less than 60% of the fibre proof strain for short term tensile load - Attenuation increment : 0.10 db for long term tensile load. # Test Method:TIA/EIA-455-41A - Applied Load: 220N/cm - Duration of loading:10 minutes - Attenuation increment: 0.10 db after the completion of the test # Test Method:TIA/EIA-455-104A - Sheave Diameter: 20D (D= Cable diameter) - No. of flexing cycles: 25 cycles - Flexing speed: 30 cycles/minute - Attenuation increment: 0.10 db after the completion of the test - No jacket cracking and fibre breakage # Test Method:TIA/EIA-455-85A - Cable length twisted: 2 meter - No. of twist cycles : 10 cycles - Twist angle: 180 Degree - Attenuation increment: 0.10 db after the completion of the test - No jacket cracking and fibre breakage # Test Method:TIA/EIA-455-3A - Temperature cycling schedule: 23 C - 30 C 70 C - 30 C 70 C - Soak time at each temperature: 12 hours - Attenuation increment: 0.10 db/km 6. PACKING AND MARKING Cable Marking The jacket shall be marked with black colour inkjet printing at the intervals of every meter with following information. a. Name of manufacturer b. Number of fibres & Cable type c. Year of manufacture d. Sequential length marking in meters
Or as per purchase order Cable Packing - Standard length of cable shall be 2000 meters and 4000 meters + 10 %. Other cable length is also provided if required by customer. - Short length up to 10% of the deliveries may be shorter than 2000 and 4000 meter but never shorter than 800 meters. - Each length of the cable shall be wound on a separate wooden reel. - Both ends of the cable shall be sealed with a suitable plastic cap to prevent the entry of moisture during shipping, handling and storage. - The inner end of the cable is housed into a slot on the side of the reel without extra cable length for testing. - Circumference battens shall be secured with steel bands to protect the cable during normal handling and shipping. Cable Reel Details given below shall be distinctly marked with a weather proof material on the both outer sides of the reel flange. Other shipping mark is also available if requested by customer. - Purchaser Name - Length of cable - Number of Fibres & Size - Gross weight - Reel Number - Name of the Manufacturer - Year of Manufacture - Arrow showing the direction the drum shall be rolled. The cable shall be shipped on reels designed to prevent damage to the cable During shipment and installation.
CROSS SECTIONAL DRAWING OF CABLE OUTER SHEATH (NYLON) DUMMY WATER SWELLABLE YARNS CENTRAL STRENGTH MEMBER LOOSE TUBE WITH FIBRES RIP CORD Diameter, Weight and Minimum Bending Radius No. of Fibres Cable Diameter mm Cable Weight Kg/Km Minimum Bending Radius (mm) Under Load No Load 192F 9.1 + 0.4 70 + 7 182 91 Number of loose tubes & number of fibres per loose tube No. of Fibres No. of Loose tube No. of Fibres per Loose tube 192F 16 12 =================== End of Specification ========================