1993 Specifications CSJ SPECIAL SPECIFICATION ITEM Fiber Optic Cable System

Transcription

1 1993 Specifications CSJ SPECIAL SPECIFICATION ITEM 6540 Fiber Optic Cable System 1.0 Description. This item shall govern for the furnishing and installation of fiber optic cables in designated field and satellite building locations as shown on the plans and as detailed in the Specifications. 2.0 Material. 2.1 General Requirements. All materials furnished, assembled, fabricated or installed under this item shall be new, corrosion resistant and in strict accordance with the details shown on the plans and in the specifications. The Contractor shall furnish, install, splice, field terminate, and test all the required fiber optic cables. All splicing kits, fiber optic cable caps, moisture/water sealants, terminators, splice trays, fiber distribution housings, fiber interconnect housing, connector panel module housings snap-in simplex connector panel modules, fiber optic jumpers, and accessories to complete the fiber optic network shall be provided as incidentals. All equipment for installation, splicing and testing shall be provided by the Contractor. 2.2 Functional Requirements. The fiber optic cables shall consist of two fiber classifications, namely, multimode and singlemode. Multimode fibers shall be used for video, voice and data communications between the satellite building and the field cabinets. The singlemode fiber optic cable shall be used as future communications medium between satellite buildings for voice, data and video transmission. The cables shall be suitable for installation in an underground conduit environment including constant immersion in water. All multimode and singlemode fibers in the fiber optic cables shall be spliced and/or terminated only in surveillance cabinets and in the satellite building as shown on the plans and as specified herein. One fiber cable shall be composed of multimode dual window (graded index) glass fibers while the second fiber cable shall be composed of singlemode glass fibers. All fiber optic glass shall be from Corning, AT&T, or an approved equal manufacturer. All fiber optic cable shall be provided from the same manufacturer. 2.3 Optical Requirements Cable Configuration The multimode dual window glass fibers shall have a graded index profile with a core/cladding size of 62.5/125 microns

2 The single mode glass fibers shall have a core/cladding size of (8-8.3)/125 microns Attenuation. For the single mode fibers, the nominal attenuation of single mode coherent light shall be 0.4 db/km or less at a wavelength of 1310 plus or minus 10 nanometers (nm). Attenuation of 0.30 db/kilometer or better shall be provided for a wavelength range in the vicinity of 1550 nanometers. For the multimode fibers, the nominal attenuation shall be 1.0 db/km or less at a wavelength of 1300 nm, and 3.5 db/kilometer or less at a wavelength of 850 nanometers Bandwidth and Dispersion. Single mode fibers shall have a maximum dispersion of 2.6 picoseconds/nanometers-kilometer at 1310 nm, and 17 picoseconds/nm-kilometer at 1550 nm. Multimode fibers shall have bandwidth of 500 MHz-km or higher at 1300 nm, and 160 MHz-km or higher at 850 nm. 2.4 Mechanical Requirements Fibers. Type 1 cable shall consist of thirty-six (36) multimode glass fibers. Type 2 cable shall consist of thirty-six (36) single mode glass fibers. Type 3 cable shall consist of six (6) multimode glass fibers. Type 4 cable shall consist of seventy-two (72) multimode glass fibers. Type 5 cable shall consist of seventy-two (72) single mode glass fibers. The multimode fibers shall have a nominal core diameter of 62.5 plus or minus 3 microns. Fiber outer diameter shall be 125 plus or minus 3 microns. The single mode fibers shall have a nominal core diameter of 8 to 8.3 microns. Fiber outer diameter shall be 125 plus or minus 3 micron Core/Clad Concentricity. Core/Clad concentricity shall be within plus or minus 1 microns Primary Coating. Each multimode and singlemode fiber shall have a minimum primary coating of 250 micron to prevent abrasion of the fiber surface Buffering. Individual fibers shall be enclosed in oversized plastic tubes which are filled with a nonhygroscopic compound to provide strength for practical handling, to prevent microbends and to preserve the individual fibers during installation and long-term service. The buffering tube or jacket shall have an outer diameter of 1.0 to 3.0 mm Tensile Strength. The cable shall be capable of withstanding a pulling tension of 600 lbs., without changing the characteristics of the optical fibers. Requirements for a higher pulling tension shall be provided as directed by the Engineer

3 2.4.6 Bend Radius. The cable shall be capable of withstanding a minimum bending radius of 10 times its outer diameter during operation and 20 times its outer diameter during installation without changing the characteristics of the optical fibers Cable Configuration. All type cables shall have a reverse oscillation structure of the buffer tubes. In Type 1, Type 2 and Type 3 cables, the buffered fibers shall be grouped to the degree practical in sub-bundles of six. In Type 4, and Type 5 cables, the buffered fibers shall be grouped to the degree practical in sub-bundles of twelve. Each grouping shall be distinctly color coded for quick and easy identification, even in dim light. Jacket construction and the configuration of the groups shall be such that they can easily be separated at splice points, permitting one set of fibers to be cut and spliced while the others remain continuous. The Contractor shall submit proposed cable designs for the Engineer's approval prior to procurement and installation of cable plant. All strength members shall be dielectric aramid yarn and shall provide the cable with the specified strength. The loose buffer tubes (filled) shall be stranded (reverse oscillation) around a dielectric central strength member and another polyethylene outer jacket shall enclose the entire cable. The cable shall be fully filled with non-hygroscopic water blocking compound to prevent water and moisture penetration. The Contractor shall also demonstrate crush and abrasion resistance of final cable design and adequacy for conduit installation under full tensile loads and multiple bends Diameter. The outer diameter of Type 1, Type 3, and Type 4 Multimode and Type 2, and Type 5 singlemode cables shall each be less than 14 mm Color Coding. Each fiber buffer tube shall be color coded separately. Within unit tubes or sub-bundles, each fiber shall have a distinctly different color coding. The color code separating multimode groupings from single mode groupings shall be distinctly different. The color coding shall be as follows: For the buffer tube (Multimode Fiber): No: Color: 1 Blue 2 Orange 3 Green 4 Brown 5 Slate 6 White

4 For the buffer tube (Singlemode Fiber): No: Colors: 1 Red 2 Black 3 Yellow 4 Violet 5 Blue Stripe 6 Orange Stripe For the fibers in each buffer tube, 1, and 3 multimode and and Type 2 singlemode: No: Color: 1 Blue 2 Orange 3 Green 4 Brown 5 Slate 6 white For the fibers in each buffer tube, 4 multimode and Type 5 single mode : No: Color: 1 Blue 2 Orange 3 Green 4 Brown 5 Slate 6 White 7 Red 8 Black 9 Yellow 10 Violet 11 Blue Stripe 12 Orange Stripe 2.5 Installation Requirements. The fiber optic cable installation techniques shall be such that the optical and mechanical characteristics of the cables are not degraded at the time of installation Experience Requirements. The Contractor's personnel involved in the installation, splicing and testing of the fiber optic cable shall meet the following requirements: - Three (3) years continuous experience in the installation of fiber optic cables, including fusion splicing, terminating, OTDR and end to end attenuation testings of both single mode and multimode fibers. - Two (2) installed systems where fiber optic cables are installed in outdoor conduits and the systems have been in continuous satisfactory operation for at least two (2) years. The Contractor shall submit the names, addresses and telephone numbers of the operating personnel who can be contacted regarding the fiber optic systems which the Contractor has installed. - One (1) fiber optic cable system (which may be one of

5 the two in the preceding paragraph) which the Contractor can arrange for demonstration to the Engineer and/or his representatives. - Splicers shall have been trained and experienced on the specific splicing equipment to be used Installation in Conduit. A part of the fiber optic cables will be installed in existing Department conduits. These conduits have been inventoried to determine that there is space available to route the new cables. However, if any relocation of existing cable is required to allow routing of cables installed on this project, it will be done by the Contractor and will be considered to be subsidiary to the "Fiber Optic Cable System". The cable pulling operation shall be performed such that a minimum bending of the cable shall not occur in the unreeling and pulling operations. Entry guide shutes shall be used to guide the cable into the pull-box conduit ports. Lubricating compound shall be used to minimize cable-to-conduit friction. Corner rollers (wheels), if used, shall not have radii less than the minimum installation bending radius of the cable. A series array of smaller wheels can be used for accomplishing the bend if the array is specifically approved by the cable manufacturer. The pulling tension shall be continuously measured and it shall not be allowed to exceed the maximum tension specified by the manufacturer of the cable. Fuse links and breaks shall be used to insure cable tensile strength not being exceeded Cable Installation between Pullboxes and Cabinets. When pulling the cable from the nearest ground box to the surveillance cabinet at the roadside, the cable shall not be broken or spliced to a second interconnecting cable to complete the run. Instead, a length of cable shall be pulled out of the exit end of the primary conduit in the ground box sufficient in length to reach the designated surveillance cabinet at curb side. A pull cable shall be used to pull this remaining length of cable through and up into the cabinet with sufficient length to reach and coil in the splice tray in the cabinet, or to be terminated to the fiber optic terminal equipment in the cabinet. Care shall be taken during this procedure to avoid bending the cable beyond its minimum bend radius Splicing Requirements. Multimode and Singlemode glass fibers shall be spliced and/or terminated by the Contractor as shown in the "Optic fiber connection" sheets in the plans. Splices/terminations shall be allowed only in the fiber distribution housings placed in the surveillance cabinets and in the fiber distribution unit in the satellite building as shown in the plans. In the surveillance cabinet(s) shown in the plans, one hundred feet of the singlemode glass fiber cable shall be coiled up and tied inside the cabinet for future splicing/termination. The open end of the coiled singlemode fiber cable shall be coated with protective coating and provided with dust cap to prevent them from

6 being damaged and scored. All splices shall use the fusion technique. Fusion splicing equipment shall be provided by the Contractor and shall be cleaned, calibrated and specifically adjusted to the fiber and environmental conditions at the start of each shift. Fusion splicing equipment used shall be approved by the Contractor's cable supplier(s). Splice enclosures, organizers and incidentals, and cable end preparation tools and procedures, shall be approved by the cable manufacturer as being compatible with the cable type being delivered. Each spliced fiber shall be packaged in a protective sleeving or housing. Bare fiber shall be completely recoated with a protective 8 RTV, gel or similar substance, prior to application of the sleeve or housing, so as to protect the fiber from scoring, dirt or microbending. In the surveillance cabinet, all fibers shall be terminated or spliced inside the compact and modular fiber distribution housing. The housing dimension shall be approximately H:9" X W:17" X D:11". Each housing shall have four snap-in simplex connector panel modules and each module shall have six fibers terminations/connections capabilities. The snap-in simplex connector panel module shall include, but not be limited to, pigtails, connectors sleeves and dust caps. The connectors shall be ST connectors. The housing shall have twelve fusion splice trays capability and each splice tray shall be capable of holding 12 fusion splices. The number of splice trays shall be as indicated on the plans. The Splice trays shall be stacked on a rack that shall permit the access to individual trays without disturbing other trays. The rack shall be located on a pull-out shelf such that the splicing operations can be performed at a distance away from the mounted unit. The housing unit shall be protected by doors capable of pivoting up or down and sliding into the unit. The function of each terminated/spliced fiber as well as the designation of each connector shall be documented by labels and charts provided on the housing door. Each housing shall be provided with strain relief. The fiber distribution housing shall be an integral unit and shall be installed as shown on the plans. The Contractor shall supply and install a connector panel module housing with snap-in simplex connector panel modules for the existing fiber distribution unit in the satellite building. The Contractor shall also supply and install singlemode fusion splice trays for the existing splice housing in the fiber distribution unit. Each connector panel module housing dimension shall be approximately H:9" X W:17" X D:11". Each connector panel module housing shall have 12 snap-in simplex connector panel modules and each such module shall have 6 fiber terminations/connectors capabilities. The snap-in simplex connector panel module shall include, but not be limited to, pigtails, connectors sleeves and dust caps. The

7 connectors shall be ST connectors for singlemode fibers. The connector panel module housing shall be equipped with a jumper routing shelf which shall store up to a minimum of five feet of cable slack for each termination within the housing. Each splice tray for the splice housing shall be capable of holding 12 fusion splices. These splice trays shall be stacked on the existing specially designed rack which permits access to individual tray without disturbing the other trays. The connector panel module housing, snap-in simplex connector modules and the splice trays shall match existing like equipment in the existing fiber distribution unit in the satellite as shown on the plans. The number of simplex connector panel modules and splice trays for the fiber distribution unit are as shown on the plans. Both ends of the type 3 multimode glass fibers shall be field connectorized with ST connectors by the Contractor. Terminations shall be allowed only in the fiber interconnect housings placed in the cabinets, as shown on the plans and as directed by the Engineer. In the cabinets, as shown on the plans, all type 3 field connectorized fibers shall be terminated inside the wallmountable compact and modular fiber interconnect housing. The housing dimensions shall be approximately H:9" X W:3" X D:10". Each housing shall have two 6-fiber capacity connector panels. Each panel shall have six ST compatible, ceramic insert, interconnection sleeves installed. Dust caps for the ST connectors shall also be provided. The housing shall be designed to allow protection of cable routing, easy of access to individual connectors, and simple arrangement of cable slack without exceeding bend radius requirements. Strain relief provisions for multiple cables within the unit shall also be provided. The housing shall contain mounting provisions for a multimode splice tray. For reliability and ease of handling of each fiber, splice tray and fan-out tubing shall be used. Each housing shall provide a splice tray and six fan-out tubings for use with the 250 microns coated fiber. The fan-out shall occur within the splice tray (no splicing of the fiber shall be required). Each tubing shall allow for the fanning out of each fiber for ease of connectorization. Each fan-out tubing shall provide 3 layers of protection; consisting of a fluoropolymer inner tube (into which each fiber is inserted), a dielectric strength member for added protection and strain-relief, and a minimum of 2.9 mm outer protective PVC orange jacketing. The cables shall be installed according to the manufacturer's recommended standards for the fiber distribution housing/unit and fiber interconnect housing

8 A maintenance loop of at least five feet of buffer tube shall be coiled up and protected inside the modular fiber distribution housings, unit and interconnect housing. This will allow for future splices in the event of a damaged splice or pigtail. Splice loss shall not exceed 0.3 db All splice losses shall be recorded in tabular form and submitted to the Engineer for approval. Splices that are made between two cables shall be tested using an Optical Time Domain Reflectometer (OTDR). These splices shall be tested at 1300 nm for multimode and at 1310 nm for singlemode and printouts of the splice tests shall be provided. Connections at patch panel and splices that are made between cable to pigtails shall be tested with OTDR to verify exceptable losses. The end to end attenuation test shall involve precalibrating the power meter and light source to 0 dbm. This calibration shall be performed using a one meter jumper. After this calibration, an end to end reading shall be taken with the cable and two jumpers (one at each end) between the light meter and optical source. The maximum allowable loss is to be less than or equal to.6db (.3 per splice times two) plus the kilometer length times the db per kilometer as per the pre-installation test. Example of 1 Km of 3.0dB/Km.6dB + (1 x 3.0) = 3.6 db maximum allowable loss These tests shall be taken in both directions and the average shall be recorded Termination Requirements. In cabinets where the optical fibers have to be connected to terminal equipment, the Contractor shall provide matching connectors with 900 micron buffer fiber pigtails of sufficient length and shall splice them to the corresponding optical fibers. Fiber pigtails shall be buffered, strengthened with dielectric aramid yarn and protected with outer PVC jacket to reduce possibility that accidental mishandling will damage the fiber or connection. The connector pigtail/splice loss for complete connection at the patch panel in front of the terminal equipment shall not exceed a mean of 0.5 db mated pair with a maximum loss of 0.8 db. This loss characteristic shall be maintained for a minimum of 500 connections (with periodic cleaning). Connectors will be qualified and accepted on the basis of connector-to-connector mating using similar fibers. All terminal connectors shall use epoxy style ST connectors. Crimp on connectors shall not be used

9 All the ST connectors ferrules shall be made of ceramic and the interconnect sleeves shall also have ceramic inserts. Connectors shall meet the EIA fiber optic test procedures for multimode and singlemode specifications Fiber Optic Jumpers. Fiber optic jumper cables shall be provided for interconnection with the terminal equipment as shown on the plans, or as directed by the Engineer. The jumper shall match the multimode cable in core size, type and attenuation. These jumpers shall be orange in color for the multimode fiber, yellow in color for the single mode fibers and shall have strain relief on the connectors. The fiber shall have a 900 micron polymer buffer, Kevlar strength member and a PVC jacket with a minimum outer jacket of 2.4 mm in diameter. The jumpers shall be three meters in length. One end of each jumper shall have an ST connector and the other end shall be a connector that is suitable to be connected to the fiber optic transmission equipment selected. Eight, one foot each, 62.5/125 multimode fiber jumpers with ST connectors shall be provided in each surveillance cabinet for testing purposes. These one foot jumpers shall remain the property of the Department after the testing is completed. 2.6 Environmental Requirements. The cable shall function within specifications over its full life time for a temperature range of 0 degrees F (minus 17.8 C) to 140 degrees F (60 degrees C), and when totally immersed in water for indefinite periods of time. 3.0 Construction Methods. 3.1 General. The installation of the cable, the splicing of the fibers, the attachment of connectors and mounting of hardware in cabinets and the methods employed in the above "Mechanical Requirements" sections shall utilize the latest available installation machinery, jacking equipment, cable pulling machinery with appropriate tension monitors, splicing equipment and testing equipment and other miscellaneous tools. All installation techniques and fixtures shall result in ease of maintenance and ready access to all components for testing and measurements. 3.2 Electronic Components. All electronic components shall comply with Special Specification "Electronic Components". 3.3 Mechanical Components. All external screws, nuts, and locking washers shall be stainless steel. No self-tapping screws shall be used unless specifically approved by the Engineer. All parts shall be made of corrosion resistant material, such as plastic, anodized aluminum or brass. All materials used in construction shall be protected from fungus growth and moisture deterioration

10 Dissimilar metals shall be separated by an inert dielectric material. 3.4 Documentation Requirements. Ten (10) complete sets of operation and maintenance manuals shall be provided. The manuals shall, as a minimum, include the following: - Complete and accurate schematic diagrams showing the fiber optic cable system. - Complete performance data of the cable system showing the losses at each splice joint and each terminal connector. - Installation, splicing, terminating and testing procedures. - Complete parts list including names of vendors. - Complete maintenance and trouble-shooting procedures. Thirty (30) days prior to installation, ten (10) copies of the Contractors Installation Practices shall be submitted for approval. This shall include practices, list of installation equipment, and splicing and test equipment. Field quality control procedures shall be detailed as well as procedures for corrective action Manufacturer's Certification. Each reel of fiber optic cable shall be accompanied by the manufacturer's test data showing the conformance to the requirements described in this Special Specification. 3.5 Testing. The testing shall be in accordance with the Special Specification "Testing, Training, Documentation and Warranty", Sections and Testing shall also include the following. 1. Pre-installation Tests. The fiber optic cable shall be tested and recorded at the site storage area prior to installation. Each optical fiber in the cable shall be tested from one end with an OTDR compatible with wavelength and fiber type. Testing shall check for length, point discontinuity and approximate attenuation. Each measurement will be recorded with color, location and type of fiber measured. In the event that a meaningful measurement cannot be made from one end, it shall be performed from the opposite end of that fiber. If the tested loss per Km exceeds the loss from the manufacturer's test data by more than.5db per Km or point discontinuity greater than 0.2 db, the Engineer shall be notified before the cable is installed. 2. Post Installation Tests. After installation, before termination, each optical fiber in the cable shall be tested and recorded again for the length, point discontinuity and loss characteristics. After each splice and connector installation, the cable shall also be tested, recorded and the data shall be submitted to the Engineer as basis for acceptance. OTDR and end to end insertion loss testings with optical meter and optical source shall be used for the testings

11 3. Subsystem Tests. The Contractor shall conduct approved fiber optic Network Subsystem Tests after the integration of the fiber optic terminal equipment to the fiber optic network. The tests, as a minimum, shall demonstrate the capability of the fiber optic cable to transmit video and digital information. Approved data forms shall be completed and turned over to the Engineer as the basis for review and for rejection or acceptance. If Subsystem Tests fail because of any components in the subsystem, the particular components shall be corrected or substituted with other components and the tests shall be repeated. If a component has been modified as a result of the Subsystem Test failure, a report shall be prepared and delivered to the Engineer prior to retesting. 3.6 Test Procedure. The Contractor shall prepare and submit all test procedures and data forms for the pre-installation, postinstallation, subsystem and system integration tests to the Engineer for approval. The test procedures shall have the Engineer's approval before the tests. The Contractor shall furnish data forms containing all of the data taken, as well as quantitative results for all tests. The data forms shall be signed by an authorized representative of the Contractor. At least one copy of the data forms shall be sent to the Engineer. 3.7 Training. The training shall be in accordance with the Special Specification "Testing, Training, Documentation and Warranty", Section 4.0. Training material shall include, as a minimum, installation techniques, use of installation tools, splicing and terminating equipment and test instruments and methods of recording installation and test data. 3.8 Warranty. The warranty shall be in accordance with the Special Specification "Testing, Training, Documentation and Warranty", Section Measurement. This Item will be measured by the linear foot of cable furnished, installed, spliced, connected and tested in accordance with these specifications. 5.0 Payment. The work performed and materials furnished in accordance with this Item and measured as provided for under "Measurement" will be paid for at the unit price bid for "Fiber Optic Cable System" of the specified type. This price shall be full compensation for furnishing and installing all cable, for pulling through conduit or duct, testing, splicing, connecting, and for all materials, labor, tools, equipment, documentation, warranty, training and incidentals necessary to complete the work