7-271300 COMMUNICATIONS BACKBONE CABLING.pdf

PROJECT NO. 22125 COVINGTON CITY HALL

COMMUNICATIONS BACKBONE CABLING 27 13 00 - 1

SECTION 27 13 00 - COMMUNICATIONS BACKBONE CABLING

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

1.2 SUMMARY

A. Section Includes:

1. Pathways.

2. 8/125-micrometer, optical fiber cabling.

3. Cable connecting hardware, patch panels, and cross-connects.

4. Cabling identification products.

1.3 DEFINITIONS

A. Cross-Connect: A facility enabling the termination of cable elements and their interconnection or cross-connection.

B. EMI: Electromagnetic interference.

C. IDC: Insulation displacement connector.

D. LAN: Local area network.

E. RCDD: Registered Communications Distribution Designer.

1.4 BACKBONE CABLING DESCRIPTION

A. Backbone cabling system shall provide interconnections between communications equipment rooms, main terminal space, and entrance facilities in the telecommunications cabling system structure. Cabling system consists of backbone cables, intermediate and main cross-connects, mechanical terminations, and patch cords or jumpers used for backbone-to-backbone cross-connection.

B. Backbone cabling cross-connects may be located in communications equipment rooms or at entrance facilities. Bridged taps and splitters shall not be used as part of backbone cabling.

COMMUNICATIONS BACKBONE CABLING 27 13 00 - 2

1.5 PERFORMANCE REQUIREMENTS

A. General Performance: Backbone cabling system shall comply with transmission standards in TIA/EIA-568, when tested according to test procedures of this standard.

1.6 ACTION SUBMITTALS

A. Product Data: For each type of product indicated.

B. Shop Drawings:

1. System Labeling Schedules: Electronic copy of labeling schedules, in software and format selected by Owner.

2. System Labeling Schedules: Electronic copy of labeling schedules that are part of the cabling and asset identification system of the software.

3. Cabling administration drawings and printouts.

4. Wiring diagrams to show typical wiring schematics including the following:

a. Cross-connects.

b. Patch panels.

c. Patch cords.

5. Cross-connects and patch panels. Detail mounting assemblies, and show elevations and physical relationship between the installed components.

C. Sustainable Design Submittals:

1.7 INFORMATIONAL SUBMITTALS

A. Qualification Data: For Installer, qualified layout technician, installation supervisor, and field inspector.

B. Source quality-control reports.

C. Field quality-control reports.

D. Maintenance Data: For splices and connectors to include in maintenance manuals.

1.8 CLOSEOUT SUBMITTALS

A. Software and Firmware Operational Documentation:

1. Software operating and upgrade manuals.

2. Program Software Backup: On magnetic media or compact disk, complete with data files.

COMMUNICATIONS BACKBONE CABLING 27 13 00 - 3

3. Device address list.

4. Printout of software application and graphic screens.

1.9 QUALITY ASSURANCE

A. Installer Qualifications: Cabling Installer must have personnel certified by BICSI on staff.

1. Layout Responsibility: Preparation of Shop Drawings and Cabling Administration Drawings by an RCDD.

2. Installation Supervision: Installation shall be under the direct supervision of Level 2 Installer, who shall always be present when Work of this Section is performed at Project site.

3. Testing Supervisor: Currently certified by BICSI as an RCDD to supervise on-site testing.

B. Testing Agency Qualifications: An NRTL.

1. Testing Agency's Field Supervisor: Currently certified by BICSI as an RCDD to supervise on-site testing.

C. Surface-Burning Characteristics: As determined by testing identical products according to ASTM E 84 by a qualified testing agency. Identify products with appropriate markings of applicable testing agency.

1. Flame-Spread Index: 25 or less.

2. Smoke-Developed Index: 50 or less.

D. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application.

E. Telecommunications Pathways and Spaces: Comply with TIA/EIA-569.

F. Grounding: Comply with ANSI-J-STD-607.

1.10 DELIVERY, STORAGE, AND HANDLING

A. Test cables upon receipt at Project site.

1. Test optical fiber cable to determine the continuity of the strand end to end.

Use optical loss test set.

2. Test optical fiber cable while on reels. Use an optical time domain reflectometer to verify the cable length and locate cable defects, splices, and connector, including the loss value of each. Retain test data and include the record in maintenance data.

COMMUNICATIONS BACKBONE CABLING 27 13 00 - 4

1.11 PROJECT CONDITIONS

A. Environmental Limitations: Do not deliver or install cables and connecting materials until wet work in spaces is complete and dry, and temporary HVAC system is operating and maintaining ambient temperature and humidity conditions at occupancy levels during the remainder of the construction period.

1.12 COORDINATION

A. Coordinate layout and installation of telecommunications pathways and cabling with Owner's telecommunications and LAN equipment and service suppliers.

PART 2 - PRODUCTS

2.1 PATHWAYS

A. General Requirements: Comply with TIA/EIA-569.

B. Cable Support: NRTL labeled for support of cabling, designed to prevent degradation of cable performance and pinch points that could damage cable.

1. CABLE/ZIP TIES SHALL NOT BE USED

2. Lacing bars, spools, J-hooks, and D-rings.

3. Straps and other devices.

2.2 OPTICAL FIBER CABLE

A. Singlemode Cable Elements (OS2) shall conform to the following specification:

1. 8.3-micron core diameter, 125-micron cladding diameter (+/- 1 micron)

2. Mode field diameter of between 8.7 and 9.3 (with +/- 0.5 micron tolerance) at

1310 nm

3. Attenuation coefficient at 1310 nm of 1.0 db/km or less

4. Attenuation coefficient at 1550 nm of 1.0 db/km or less

5. Cladding non-circularity of +/- 1%

6. Core to cladding concentricity error of or more than 0.8 micron

7. Maximum dispersion rate of 2.80 ps/nm-km at 1300 nm

8. Maximum dispersion rate of 17.00 ps/nm-km at 1550 nm

9. Individual glass elements proof tested at 100 kpsi (100,000 lbs. per square inch)

10. Number of elements as indicated on the drawings

COMMUNICATIONS BACKBONE CABLING 27 13 00 - 5

B. Backbone Optical Fiber Cable: Cable shall be plenum rated (OFNP) for use as an internal cable in a plenum environment. The cable shall be tight-buffered construction with optical fibers contained within 900-micron color-coded buffers.

The cable will be an all-dielectric construction, with a central strength member.

C. Internal/External Cable: Provide internal/external optical fiber cable. The cable shall be riser rated (OFNR) for use as an internal cable in a non-plenum m environment. The cable shall also be recommended by the manufacturer for use as an external cable suitable for installation in an underground duct. Optical fibers shall be contained within loose buffer tubes utilizing water blocking tapes or compounds surrounding these tubes. The cable will be an all-dielectric construction, with a central strength member.

D. External Cable: Provide external optical fiber cable. The cable shall be recommended by the manufacturer for use as an external cable suitable for installation in an underground duct. Optical fibers shall be contained within loose buffer tubes utilizing water blocking tapes or compounds surrounding these tubes.

The cable will be an all-dielectric construction, with a central strength member.

2.3 OPTICAL FIBER CABLE HARDWARE

A. Rack Mounted optical fiber patch panel, conforming to the following specification:

1. Each panel shall be suitable for installation in EIA 19" mounting frame.

2. Provide strain relief for each cable at the rear of the patch panel.

3. Allow for labeling of each individual connector.

4. Allow any individual cable to be terminated or otherwise handled without disturbing other cables.

5. Each panel shall provide fiber handling for fiber elements, including 36" fiber reserve (service loop) inside the patch panel with or bends sharper than 2" bend radius.

6. Provide blanking adapter plates to cover all unused spaces as necessary.

2.4 OPTICAL FIBER CONNECTORS

A. Singlemode Optical Fiber Connectors. Provide singlemode duplex LC optical fiber connectors, conforming to the following specification.

1. Small form factor LC connectors

2. Duplex, handling one pair (two elements) per connector.

3. Blue in color.

4. Compatible with both 900 micron buffered strands and 250micron loose tube strands.

5. Maximum insertion loss, of mated pair, less than 0.5 dB at acceptance.

6. Minimum return loss of greater than or equal to 40 (50 for LC) dB.

COMMUNICATIONS BACKBONE CABLING 27 13 00 - 6

7. Durability better than 500 matings, with a maximum increase in insertion loss of not more than 0.2 dB.

8. Meets ANSI/TIA/EIA 568-B and ISO 11801 standards.

2.5 PATCH CORDS

A. Optical Fiber. Provide one optical fiber patch cord per optical fiber pair installed.

These shall be sourced from the same manufacturer as the optical fiber connectors provided as a part of this project. Each cord shall meet or exceed the optical fiber performance specifications in this document.

1. 20% of the patch cords shall be 3 feet in length and yellow in color

2. 60% of the patch cords shall be 7 feet in length and yellow in color

3. 20% of the patch cords shall be 11 feet in length and yellow in color

B. The patch cords are to be passed to the client on completion of the project. Each cord is to have a manufacturer’s certificate of conformance and shall be in its original, unopened packaging.

2.6 GROUNDING

A. Comply with ANSI-J-STD-607.

2.7 IDENTIFICATION PRODUCTS

A. Comply with TIA/EIA-606 and UL 969 for a system of labeling materials, including label stocks, laminating adhesives, and inks used by label printers.

2.8 SOURCE QUALITY CONTROL

A. Testing Agency: Engage a qualified testing agency to evaluate cables.

B. Factory test cables on reels according to TIA/EIA-568.

C. Factory test singlemode optical fiber cables.

D. Cable will be considered defective if it does not pass tests and inspections.

E. Prepare test and inspection reports.

COMMUNICATIONS BACKBONE CABLING 27 13 00 - 7

PART 3 - EXECUTION

3.1 ENTRANCE FACILITIES

A. Coordinate backbone cabling with the protectors and demarcation point provided by communications service provider.

3.2 WIRING METHODS

A. Wiring Method: Install cables in raceways and cable trays except within consoles, cabinets, desks, and counters. Conceal raceway and cables except in unfinished spaces.

1. Install plenum cable in environmental air spaces, including plenum ceilings.

2. Comply with requirements for raceways and boxes specified in Section 260533

"Raceway and Boxes for Electrical Systems."

B. Wiring Method: Conceal conductors and cables in accessible ceilings, walls, and floors where possible.

C. Wiring within Enclosures: Bundle, lace, and train cables within enclosures. Connect to terminal points with no excess and without exceeding manufacturer's limitations on bending radii. Provide and use lacing bars and distribution spools.

3.3 INSTALLATION OF PATHWAYS

A. Cable Trays: Comply with NEMA VE 2 and TIA/EIA-569.

B. Comply with requirements for demarcation point, pathways, cabinets, and racks specified in Section 271100 "Communications Equipment Room Fittings." Drawings indicate general arrangement of pathways and fittings.

C. Comply with TIA/EIA-569 for pull-box sizing and length of conduit and number of bends between pull points.

D. Comply with requirements in Section 260533 "Raceway and Boxes for Electrical Systems" for installation of conduits and wireways.

E. Install manufactured conduit sweeps and long-radius elbows whenever possible.

F. Pathway Installation in Communications Equipment Rooms:

COMMUNICATIONS BACKBONE CABLING 27 13 00 - 8

1. Position conduit ends adjacent to a corner on backboard where a single piece of plywood is installed, or in the corner of room where multiple sheets of plywood are installed around perimeter walls of room.

2. Install cable trays to route cables if conduits cannot be located in these positions.

3. Secure conduits to backboard when entering room from overhead.

4. Extend conduits 3 inches (76 mm) above finished floor.

5. Install metal conduits with grounding bushings and connect with grounding conductor to grounding system.

G. Backboards: Install backboards with 96-inch (2440-mm) dimension vertical. Butt adjacent sheets tightly and form smooth gap-free corners and joints.

3.4 INSTALLATION OF CABLES

A. Comply with NECA 1.

B. General Requirements for Cabling:

1. Comply with TIA/EIA-568.

2. Comply with BICSI ITSIM, Ch. 6, "Cable Termination Practices."

3. Install 110-style IDC termination hardware unless otherwise indicated.

4. Terminate all conductors; no cable shall contain unterminated elements.

Make terminations only at indicated outlets, terminals, cross-connects, and patch panels.

5. Cables may not be spliced. Secure and support cables at intervals not exceeding 30 inches (760 mm) and not more than 6 inches (150 mm) from cabinets, boxes, fittings, outlets, racks, frames, and terminals.

6. Install lacing bars to restrain cables, to prevent straining connections, and to prevent bending cables to smaller radii than minimums recommended by manufacturer.

7. Bundle, lace, and train conductors to terminal points without exceeding manufacturer's limitations on bending radii, but not less than radii specified in BICSI ITSIM, "Cabling Termination Practices" Chapter. Use lacing bars and distribution spools.

8. Do not install bruised, kinked, scored, deformed, or abraded cable. Do not splice cable between termination, tap, or junction points. Remove and discard cable if damaged during installation and replace it with new cable.

9. Cold-Weather Installation: Bring cable to room temperature before dereeling.

Heat lamps shall not be used for heating.

10. In the communications equipment room, install a 10-foot- (3-m-) long service loop on each end of cable.

11. Pulling Cable: Comply with BICSI ITSIM, Ch. 4, "Pulling Cable." Monitor cable pull tensions.

C. Optical Fiber Cable Installation:

COMMUNICATIONS BACKBONE CABLING 27 13 00 - 9

1. Comply with TIA/EIA-568

2. Cable may be terminated on connecting hardware that is rack or cabinet mounted.

D. Open-Cable Installation:

1. Install cabling with horizontal and vertical cable guides in telecommunications spaces with terminating hardware and interconnection equipment.

2. Cable shall not be run through structural members or in contact with pipes, ducts, or other potentially damaging items.

E. Installation of Cable Routed Exposed under Raised Floors:

1. Install plenum-rated cable only.

2. Install cabling after the flooring system has been installed in raised floor areas.

3. Coil cable 6 feet (1800 mm) long not less than 12 inches (300 mm) in diameter below each feed point.

F. Group connecting hardware for cables into separate logical fields.

G. Separation from EMI Sources:

1. Comply with BICSI TDMM and TIA/EIA-569 recommendations for separating unshielded copper voice and data communication cable from potential EMI sources, including electrical power lines and equipment.

2. Separation between open communications cables or cables in nonmetallic raceways and unshielded power conductors and electrical equipment shall be as follows:

a. Electrical Equipment Rating Less Than 2 kVA: A minimum of 5 inches (127 mm).

b. Electrical Equipment Rating between 2 and 5 kVA: A minimum of 12 inches (300 mm).

c. Electrical Equipment Rating More Than 5 kVA: A minimum of 24 inches (610 mm).

3. Separation between communications cables in grounded metallic raceways and unshielded power lines or electrical equipment shall be as follows:

a. Electrical Equipment Rating Less Than 2 kVA: A minimum of 2-1/2 inches (64 mm).

b. Electrical Equipment Rating between 2 and 5 kVA: A minimum of 6 inches (150 mm).

c. Electrical Equipment Rating More Than 5 kVA: A minimum of 12 inches (300 mm).

COMMUNICATIONS BACKBONE CABLING 27 13 00 - 10

4. Separation between communications cables in grounded metallic raceways and power lines and electrical equipment located in grounded metallic conduits or enclosures shall be as follows:

a. Electrical Equipment Rating Less Than 2 kVA: No requirement.

b. Electrical Equipment Rating between 2 and 5 kVA: A minimum of 3 inches (76 mm).

c. Electrical Equipment Rating More Than 5 kVA: A minimum of 6 inches

(150 mm).

5. Separation between Communications Cables and Electrical Motors and Transformers, 5 kVA or HP and Larger: A minimum of 48 inches (1200 mm).

6. Separation between Communications Cables and Fluorescent Fixtures: A minimum of 5 inches (127 mm).

3.5 FIRESTOPPING

A. Comply with TIA/EIA-569, Annex A, "Firestopping."

B. Comply with BICSI TDMM, "Firestopping Systems" Article.

3.6 GROUNDING

A. Install grounding per BICSI TDMM, "Grounding, Bonding, and Electrical Protection" Chapter.

B. Comply with ANSI-J-STD-607.

C. Locate grounding bus bar to minimize the length of bonding conductors. Fasten to wall allowing at least 2-inch (50-mm) clearance behind the grounding bus bar.

Connect grounding bus bar with a minimum No. 4 AWG grounding electrode conductor from grounding bus bar to suitable electrical building ground.

D. Bond metallic equipment to the grounding bus bar, using not smaller than No. 6 AWG equipment grounding conductor.

3.7 IDENTIFICATION

A. Identify system components, wiring, and cabling complying with TIA/EIA-606.

1. Administration Class: 2.

2. Color-code cross-connect fields and apply colors to voice and data service backboards, connections, covers, and labels.

COMMUNICATIONS BACKBONE CABLING 27 13 00 - 11

B. Comply with requirements in Section 099123 "Interior Painting" for painting backboards. For fire-resistant plywood, do not paint over manufacturer's label.

C. Paint and label colors for equipment identification shall comply with TIA/EIA-606 for Class 3 level of administration.

D. Cable Schedule: Install in a prominent location in each equipment room and wiring closet. List incoming and outgoing cables and their designations, origins, and destinations. Protect with rigid frame and clear plastic cover. Furnish an electronic copy of final comprehensive schedules for Project.

E. Cabling Administration Drawings: Show building floor plans with cabling administration-point labeling. Identify labeling convention and show labels for telecommunications closets, backbone pathways and cables, entrance pathways and cables, terminal hardware and positions, horizontal cables, work areas and workstation terminal positions, grounding buses and pathways, and equipment grounding conductors.

F. Cable and Wire Identification:

1. Label each cable within 4 inches (100 mm) of each termination and tap, where it is accessible in a cabinet or junction or outlet box, and elsewhere as indicated.

2. Each wire connected to building-mounted devices is not required to be numbered at device if color of wire is consistent with associated wire connected and numbered within panel or cabinet.

3. Exposed Cables and Cables in Cable Trays and Wire Troughs: Label each cable at intervals not exceeding 15 feet (4.5 m).

4. Label each terminal strip and screw terminal in each cabinet, rack, or panel.

a. Individually number wiring conductors connected to terminal strips and identify each cable or wiring group being extended from a panel or cabinet to a building-mounted device with name and number of particular device as shown.

b. Label each unit and field within distribution racks and frames.

5. Identification within Connector Fields in Equipment Rooms and Wiring Closets:

Label each connector and each discrete unit of cable-terminating and connecting hardware. Where similar jacks and plugs are used for both voice and data communication cabling, use a different color for jacks and plugs of each service.

G. Labels shall be preprinted or computer-printed type with printing area and font color that contrasts with cable jacket color but still complies with requirements in TIA/EIA 606, for the following:

1. Cables use flexible vinyl or polyester that flexes as cables are bent.

COMMUNICATIONS BACKBONE CABLING 27 13 00 - 12

3.8 FIELD QUALITY CONTROL

A. Testing Agency: Engage a qualified testing agency to perform tests and inspections.

B. Perform tests and inspections.

C. Tests and Inspections:

1. Visually inspect optical fiber jacket materials for NRTL certification markings.

Inspect cabling terminations in communications equipment rooms for compliance with color-coding for pin assignments and inspect cabling connections for compliance with TIA/EIA-568.

2. Visually inspect cable placement, cable termination, grounding and bonding, equipment and patch cords, and labeling of all components.

a. Test instruments shall meet or exceed applicable requirements in TIA/EIA-

568. Perform tests with a tester that complies with performance requirements in "Test Instruments (Normative)" Annex, complying with measurement accuracy specified in "Measurement Accuracy (Informative)" Annex. Use only test cords and adapters that are qualified by test equipment manufacturer for channel or link test configuration.

3. General Instructions.

a. The testing is to show beyond reasonable doubt that there are or errors, damaged or incorrectly installed components, that the installation is correctly labeled and that all the installed components meet or exceed the criteria detailed in these specifications and applicable standards.

Any test that does not show that a component is satisfactorily installed, as per these specifications, shall be repeated. If a test procedure needs to be modified to satisfactorily test some components, the modification shall be submitted for approval of the Owner’s Representative, prior to the tests being conducted.

b. Following optical fiber and data cable installation, including labeling and termination at both ends, undertake and record tests to ensure that the cabling system will perform satisfactorily in service. In addition to the tests detailed in this specification, the Installer shall carry out any additional tests that the Installer deems necessary to ensure the satisfactory operation of the telephone and data systems. The costs of these additional tests shall be borne by the Installer.

c. All outlets, cables, patch panels and associated components shall be fully assembled and labeled prior to testing. Any testing performed on incomplete systems shall be redone on completion of the work.

d. Provide the Owners' Representative with the opportunity to witness all testing. On reasonable request, the installer shall demonstrate

COMMUNICATIONS BACKBONE CABLING 27 13 00 - 13

that the test procedure competently identifies the fault conditions being tested for.

e. Complete and record all of the tests identified in these specifications.

f. Notify the Owners' Representative ten working days before the date of commencement of the cable tests. Provide details in writing, on that advance date, of proposed tests, the test schedule, equipment to be used, its certification and calibration and the names and qualifications of test personnel.

g. The Owner and Owners Representative shall be invited, to the first instance of each type of test conducted. In the event of a number of tests being conducted by the Installer prior to this first inspection, the Owner’s Representative reserves the right to reject these tests as non-compliant and to require them to be repeated at the Installer’s cost.

h. Personnel shall be competent in and qualified by experience or training for comprehensive OTDR operation and troubleshooting, for both copper and optical fiber testing.

i. Include the cost of obtaining, calibrating and maintaining test equipment and the cost of carrying out and recording the tests detailed in this specification, including labor costs, in the bid sum. Or extra costs will be entertained.

j. Ensure that all test equipment is in calibration before delivery to site and throughout the testing period. The Installer shall be responsible for ensuring that any necessary tests and rework to maintain equipment's calibration status is carried out. Any tests performed on uncalibrated test equipment shall be repeated at the Installer’s cost.

k. The test documentation shall be available for inspection by the Owners' Representative during the installation period and copies shall be passed to the Owners' Representative within five working days of completion of tests on cables in each area. The Installer shall retain a copy to aid preparation of as-built information.

l. Failures detected during the testing shall be noted on the test results schedule, rectified and re-tested. On the fault being rectified, this shall also be noted. These notes shall not be deleted or obliterated.

m. Rectification of all damaged cables shall include replacing damaged cables with new cables in complete runs, replacing damaged connectors or remaking poor terminations. In-line cable joints, splices or distribution points will not be acceptable except where specified in this document. All damaged cables shall be removed from site.

n. If on submittal of the As-Built documentation there are any missing test results or incorrectly named files, the test shall be repeated at the Installer’s expense.

D. Optical Fiber Cabling

1. Test each Optical Fiber Cable and its associated connectors. Carry out the following tests on every element of every optical fiber cable:

COMMUNICATIONS BACKBONE CABLING 27 13 00 - 14

a. Length

b. End-to-End Attenuation

c. Connector Loss

d. Splice Loss

e. Power Loss

2. The tester shall have the following parameters:

a. Optical Time Domain Reflectometer (OTDR) shall be used to test every optical fiber cabling

b. OTDR shall be used to test optical in both directions and take the average. Provide a launch lead and far end drop off lead.

c. Singlemode optical fibers shall be tested at 1310nm and 1550nm

3. Test each optical fiber cable element and its associated connectors. Carry out the following test on every element of every optical fiber cable:

a. Visually check optical connectors using microscope (minimal magnification x200) to ensure that or physical damage has occurred during the installation process. There are to be or scratches on the core of the fiber or pits on the core or cladding. If any defect cannot be rectified with polishing, the connector is to be replaced.

b. Carry out OTDR tests on all elements at 1310 nm for singlemode. These tests shall be carried out from both ends using a near end launch lead and a far end drop lead.

c. The number of samples (averages) for each OTDR test shall be such that the noise amplitude is significantly less than the smallest loss of any component under test. This may vary for different cable runs, for shorter runs and fusion splices etc.; it may be necessary to run many samples.

d. Record the length and loss of each mated connector pair on the test results schedule for all elements.

e. Verify the labeling of the cable and connectors is correct.

f. If a element has an excessive attenuation coefficient, a sudden step in attenuation coefficient (greater than 0.2 dB) or back scatter, losses due to micro bending or macro bending or has any other fault then the fault on that element shall be rectified.

g. Data for each measurement shall be documented. Data for submittals shall be printed in a summary report that is formatted like Table 10.1 in BICSI TDMM, or transferred from the instrument to the computer, saved as text files, and printed and submitted.

h. Remove and replace cabling where test results indicate that they do not comply with specified requirements.

i. End-to-end cabling will be considered defective if it does not pass tests and inspections.

j. Prepare test and inspection reports.

k. The following table lists the pass/fail criteria for all connectors and fusion splices under test. Any component that does not pass these figures shall be re-worked or replaced.

COMMUNICATIONS BACKBONE CABLING 27 13 00 - 15

l. The attenuation of each singlemode connector shall be measured in both directions.

m. Each fusion splice shall be tested in both directions for singlemode elements. The measurements for each direction shall be averaged for the final attenuation figure for each fusion splice.

n. The return loss must be measured in both directions for singlemode connectors. The return loss shall be greater or equal to the value shown in the table above.

o. Any failures shall be recorded (including value of excessively lossy terminations) and the results obtained after rectification of the fault shall be recorded.

p. Graphical printouts shall be taken of OTDR tests for each element. These printouts shall be stapled or otherwise attached to 11" x 8.5" size sheets.

They shall be printed at an appropriate scale, such as 0.5 dB per division for the attenuation axis. Provide diskette copies of the OTDR traces to the owner on completion of the testing. Provide a copy of the emulation software and the appropriate license to the client.

END OF SECTION 27 13 00