23 TECHNICAL SPECIFICATION OPTICAL FIBRE CABLE LOOSE TUBE / JELLY FILLED DOUBLE JACKET / SINGLE ARMORED (LTD ARM CABLE) 23 PAGE 2 OF 8 1. SCOPE 1.1 Application This specification covers the general requirements for fiber optic telecommunication cables used for inter-building backbone in duct, direct buried and lashed aerial installation. 1.2 Cable Description 1) Jelly Filled / Double Jacket / Single Armored Rodent Protected Cable Single and 50 or 62.5 Multi mode color coded fibers, jelly filled color coded loose tubes, PE filler (if required), water swellable yarn around the central strength member, SZ-stranded around the dielectric CSM, water swellable tape, outer strength member, inner PE jacket, water swellable tape, corrugated steel tape armor and outer PE jacket. 2. OPTICAL FIBER The optical, geometrical and mechanical performance of the optical fiber shall be in accordance with Table 1 and 2 below. Table 1. The Optical, Geometrical and Mechanical Performance of the Multi Mode Fiber SPECIFICATION ITEMS UNITS 50 Multi Mode 62.5 Multi Mode Attenuation dB/km ≤ 3.0 at 850nm ≤ 1.0 at 1300nm ≤ 3.5 at 850nm ≤ 1.0 at 1300nm Bandwidth MHz.km ≥ 400 at 850nm ≥ 600 at 1300nm ≥ 200 at 850nm ≥ 400 at 1300nm Numerical Aperture - 0.20±0.015 0.275±0.015 Core Diameter µm 50±3.0 62.5±3.0 Core Non-circularity % ≤ 6.0 ≤ 6.0 Cladding Diameter µm 125±2.0 125±2.0 Cladding Non-circularity % ≤ 2.0 ≤ 2.0 Core/Cladding Concentricity Error µm ≤ 3.0 ≤ 3.0 Coating Diameter µm 245±15 245±15 Proof Test Kpsi ≥ 100 ≥ 100 *Note) Superior performance available upon request. 23 PAGE 3 OF 8 Table 2. The Optical, Geometrical and Mechanical Performance of the Single Mode Fiber ITEMS UNITS SPECIFICATION Attenuation dB/km ≤ 0.4 at 1310nm ≤ 0.25 at 1550nm Chromatic Dispersion ps/nm.km ≤ 3.2 at 1285nm ~ 1330nm ≤ 18 at 1550nm Zero Dispersion Wavelength nm 1300 ~ 1324 Zero Dispersion Slope ps/nm 2 .km ≤ 0.093 Cut-off Wavelength (λcc, 22m of a cabled fiber) nm ≤ 1270 Mode Field Diameter µm 9.3±1.0 Mode Field Concentricity µm ≤ 0.8 Cladding Diameter µm 125±1.0 Cladding Non-circularity % ≤ 1.0 Coating Diameter µm 245±15 Proof Test Kpsi ≥ 100 *Note) Superior performance available upon request. 3. CABLE CONSTRUCTION The construction of the cable shall be in accordance with Table 3 below. Table 3. Construction of the Cable ITEMS DESCRIPTION Type of Fiber Single Mode or 62.5 Multi Mode or 50 Multi Mode Number of Fibers 2 ~ 72 No. of Fibers per Tube Max. 12 Material PBT (Polybutylene Terephthalate) Loose Buffer Tube Diameter Nom. 2.4mm Filling Compound in Loose Buffer Tube Thixotropic Jelly Compound Material Polyethylene rods (Natural color) Filler (if necessary) Diameter Nom. 2.4mm Central Strength Member FRP (Fiberglass Reinforced Plastic) Water Blocking Material Water Swellable Yarn around the CSM (To prevent the water ingress into the cable core) Core Wrapping Tape Water Swellable Tape (To prevent the water ingress into the cable core) 23 PAGE 4 OF 8 Table 3. Construction of the Cable(continued) ITEMS DESCRIPTION Outer Strength Member Glass yarns (To provide the required tensile strength together) Ripcord Two Ripcords (To provide easy cable entry, approx. 180° separation) Material Black HDPE or MDPE Inner Jacket Thickness Nom. 1.0mm, Min. 0.7mm Water Blocking Material Water Swellable Tape (To prevent the ingress of water) Ripcord Two Ripcords (To provide easy cable entry, approx. 180° separation) Material Steel Tape with Plastic Coating on Both Sides Armor Thickness Nom. 0.15mm (Steel Tape) Nom. 0.05mm (Plastic Coating) Material Black HDPE or MDPE Outer Jacket Thickness Nom. 1.5mm, Min. 1.2mm 4. FIBER AND LOOSE BUFFER TUBE IDENTIFICATION The color code of the loose buffer tubes and the individual fibers within each loose buffer tube shall be in accordance with Table 4 below. Table 4. The Color Code of the Individual Fibers and Loose Tubes No. Color No. Color 1 Blue 7 Red 2 Orange 8 Black 3 Green 9 Yellow 4 Brown 10 Violet 5 Gray 11 Pink 6 White 12 Aqua 23 PAGE 5 OF 8 5. PHYSICAL / MECHANICAL / ENVIRONMENTAL PERFORMANCE The mechanical and environmental performance of the cable shall be in accordance with Table 5 below. Unless otherwise specified, all attenuation measurements required in this section shall be performed at 1550nm for single mode fiber (SM) and at 1300nm for multi mode fiber (MM). Table 5. The Mechanical and Environmental Performance of the Cable ITEMS TEST METHOD AND ACCEPTANCE CRITERIA Tensile Performance # Test method: IEC 794-1-E1 -. Mandrel diameter: 30D (D = cable diameter) -. Tensile load: 2,700N for 1 hour # Acceptance Criteria -. Fiber strain: ≤ 0.33% -. Attenuation increment: ≤ 0.10 dB (SM) ≤ 0.20 dB (MM) for long term tensile load Crush # Test method: IEC 794-1 Method E3 -. Applied load: 3500N/100mm -. Duration of loading: 1 minute # Acceptance Criteria -. Attenuation Increment: ≤ 0.10 dB (SM) ≤ 0.20 dB (MM) after completion of the test Impact # Test method: IEC 794-1 Method E4 -. Drop hammer mass: 1 kg -. Height of impact: 1 m -. Diameter of drop hammer: 25 mm -. Radius impact surface: 300 mm -. No. of impact per point: 1 time -. No. of impact points: 5 points (500mm interval) # Acceptance Criteria -. No jacket cracking and fiber breakage -. Attenuation Increment: ≤ 0.10 dB (SM) ≤ 0.20 dB (MM) after completion of the test Repeated Bending # Test method: IEC 794-1 Method E6 -. Sheave diameter: 20D (D = cable diameter) -. No. of flexing cycles: 30 cycles -. Flexing speed: 30 cycles/minute # Acceptance Criteria -. No jacket cracking and fiber breakage -. Attenuation Increment: ≤ 0.10 dB (SM) ≤ 0.20 dB (MM) after completion of the test 23 PAGE 6 OF 8 Table 5. The Mechanical and Environmental Performance of the Cable (continued) ITEMS TEST METHOD AND ACCEPTANCE CRITERIA Torsion # Test method: IEC 794-1 Method E7 -. Cable length twisted: 2m -. No. of twist cycles: 10 cycles -. Twist angle: ± 180° # Acceptance Criteria -. No jacket cracking and fiber breakage -. Attenuation Increment: ≤ 0.10 dB (SM) ≤ 0.20 dB (MM) (after completion of the test) Temperature Cycling # Test method: IEC 794-1 Method F1 -. Temperature cycling schedule : 23°C → -30°C → 70°C → -30°C → 70°C -. Soak time at each temperature: 8hours # Acceptance Criteria -. Attenuation increment: ≤ 0.15 dB/km (SM) ≤ 0.20 dB/km (MM) Water Penetration # Test method: IEC 794-1 Method F5 -. Length of specimen: 3m -. Height of pressure head: 1m -. Test time: 24 hours # Acceptance Criteria -. No leakage through the open cable end 6. PACKING AND MARKING 6.1 Cable Marking The jacket shall be marked at intervals of one meter with following information. 1) Cable type and fiber counts 2) Name of the manufacturer 3) Year of manufacture 4) Length marking 23 PAGE 7 OF 8 6.2 Cable Packing 6.2.1 Standard length of cable shall be 2km. Other cable length is also available if requested by customer. 6.2.2 Short lengths: up to 10% of the deliveries may be shorter than standard length but never shorter than 1,000 meters. 6.2.3 Each length of the cable shall be wound on a separate wooden reel. 6.2.4 Both ends of the cable shall be sealed with suitable plastic caps to prevent the entry of moisture during shipping, handling and storage. 6.2.5 The cable ends shall be securely fastened to the reel to prevent the cable from becoming loose in transit or during placing operations. 6.2.6 The inner end of the cable is housed into a slot on the side of the reel without extra cable length for testing. 6.2.7 Circumference battens or wood-fiber board shall be secured with steel bands to protect the cable during normal handling and shipping. 6.3 Cable Reel 6.3.1 Details given below shall be distinctly marked with a weather proof material on both outer sides of the reel flange: (1) Purchaser’s name (2) Cable type and fiber counts (3) Length of cable in meters (4) Gross weight in kilograms (5) Reel number (6) Year of manufacture (7) Name of the manufacturer (8) Arrow showing the direction the drum shall be rolled Other shipping mark is also available if requested by customer. 6.3.2 The cable shall be shipped on reels designed to prevent damage to the cable during shipment and installation. 6.3.3 The arbor holes provided in the reels shall be at least 65 mm and at most 120 mm in diameter. The arbor hole on each flange shall be reinforced with a bearing plate. 23 PAGE 8 OF 8 < Cross-section Drawing of Cable > 1. 36-fiber cable No. of Fibers Nominal Cable Diameter (mm) Approx. Cable Weight (kg/km) 2 ~ 72 16.0 240 *) Actual values for cable weight and diameter may deviate from the calculated values given in the table above. == End of Specification == Optical Fibers Thixotropic Jelly Compound Loose Tubes PE Filler Central Strength Member Water Swellable Yarn Water Swellable Tape Outer Strength Member Ripcords Inner PE Jacket Water Swellable Tape Corrugated Steel Tape Outer PE Jacket . Tensile Performance # Test method: IEC 79 4-1 -E1 -. Mandrel diameter: 30D (D = cable diameter) -. Tensile load: 2,700N for 1 hour # Acceptance Criteria -. Fiber. Temperature Cycling # Test method: IEC 79 4-1 Method F1 -. Temperature cycling schedule : 23°C → -3 0°C → 70°C → -3 0°C → 70°C -. Soak time at each temperature: