UTP DATA CABLING SYSTEMS

A. The general topology shall be a "hierarchal star" configuration. All segments shall originate in NRTL-listed patch panels located in the telecommunication equipment racks/cabinets, and shall end at the Work Area Outlet.

B. Backbone cables shall be installed in EMT between the Head End (MDF/MCER) and the telecommunications closets (IDF/ICER).

C. Routing

1. All cabling shall be installed in conduit where indicated on plans, or shall be installed open using "J" hooks or Snake Tray.

2. Cables shall be routed, in large groups, down main cable pathways, until a direct path to the point of access to the work station outlet can be taken. At that point, cables shall be routed, above all building systems, to the outlet location, in accordance with standard installation practices as described herein.

3. Multiple cables to individual rooms shall be pulled as a bundle and terminated at each end in sequential order so that labeling within a room location is in sequence.

4. When not in conduit or tray, cables shall be supported to the deck and/or beams, every five feet throughout the length of their installed run. Hangers, clips, and other methods of grouping the cables and keeping them away from other systems installed in the building are to be provided and installed. Ensure that hangers and other methods of securing cable do not compress cable or damage insulation.

5. Route cables minimum of 12 inches (305mm) away to avoid light ballasts, transformers, power wiring, and other electrical devices, so that there is no EMI or RFI interference with data transmission.

6. Cable routes shall be within 90-degree angles whenever possible. Cables shall not be installed randomly or diagonally through the building.

7. Cables installed partially or fully within the communications room shall be routed through, and secured in, the cable tray or ladder rack wherever possible. No cables are to be routed across the rooms at angles, nor are the cables to be run from one portion of the room or tray to another. Cables placed in the cable tray or ladder rack are to be laced frequently to keep them neatly bundled and to prevent them from shifting from one side of the tray to the other as they are routed in the tray.

8. Station cables shall be routed to fixed-wall locations through EMT to back box. Secure and store four feet of slack cable above ceiling at cable entrance to EMT.

E. All cables shall have both ends completely terminated at their respective patch panel and Work Area Outlet. Individual conductors shall be trimmed flush with IDC block. Cables indicated to be "spare" shall have one end terminated at their respective patch panel or cross-connect block and the other end shall be hermetically sealed with a polyolefin heat-shrinkable cap. Provide Raychem Co. or approved equivalent after testing. Tape shall not be approved.

F. The total length of permanently installed cable for any complete segment shall not exceed 295 feet (90m). Do not splice or otherwise re-terminate any cable used. Terminate only at the patch panels, cross-connect blocks, and Work Area Outlets. Route cables (minimum of 12 inches (305mm) away) to avoid light ballasts, transformers, power wiring, and other electrical devices so that there is no EMI or RFI interference with data transmission. Permanently label all cables six inches from the connector at each end, according to the numbering convention outlined in the section on labeling. All cables shall be terminated at outlets, patch panels, or cross-connect blocks only.

G. Maximum pulling tension shall not exceed 25 lbs/ft. when installing cables.

H. Modular Jacks

1. Each Category 6A jack shall have a Category 6A cable home run back to its associated patch panel or cross-connect block.

3.15 FIBER OPTIC CABLING SYSTEMS

A. Cabling

1. The general topology shall be star configuration. All segments shall originate from NRTL-listed fiber optic patch panels, located in the MDF/MCER equipment rack/cabinet and be distributed to fiber optic patch panels in each IDF/CER equipment rack/cabinet. 2. All strands within the fiber optic backbone cables shall have both ends terminated in their

respective patch panels. "Dark" fibers are not allowed.

3. All fibers supplied in cable shall be usable fibers and meet required specifications. "Spare" unspecified fibers shall not be allowed.

4. Pulling tension shall not exceed 25 lbs/ft when installing cables.

5. Fiber Optic Cable Management

a. Hook-and-loop (Velcro) type cable wraps shall be secured with minimum required compression in order to secure cables properly without impeding the signal transmission rating (geometry) of the cable. Cable ties are strictly prohibited. b. Split-mesh, metal strain-relief’s (Kellums) shall be provided to secure cables

installed vertically. c. Fiber Optic Patch Panels

1) Provide silk screening on panel to distinctly identify transmit (Tx) and receive (Rx) at each port. Provide large, bold label, indicating information similar to "CAUTION - SEVERE EYE DAMAGE! DO NOT LOOK INTO FIBER OPTIC CONNECTOR WHILE ENERGIZED!", and mount signage to the fiber optic patch panel.

DOUGLAS MIDDLE SCHOOL

d. Innerduct

1) All fiber optic cabling shall be installed in inner duct.

2) Provide 1 1/4 inch inner ducts with 200-pound-test pull line, above ceilings

through the building from one equipment rack/cabinet to the next rack/equipment.